A method, device and medium for optimizing base entrance and exit settings

Abstract

The present invention discloses a method, device and medium for optimizing the setting of entrances and exits of a base. This application obtains static and dynamic traffic data of the base, combines the driver's visual characteristic factors and a preset formula, calculates the minimum value of the angle between the entrance and exit and the road, and compares it with the initial value of the angle. If the initial value is greater than or equal to the minimum value and the traffic capacity meets the traffic demand, the entrance and exit setting plan is confirmed to be feasible; if it does not meet the conditions, the speed limit plan is optimized and the optimized plan is re-evaluated. If the optimized plan still does not meet the conditions, it is determined that the base does not have the opening conditions. This process ensures the rationality and safety of the entrance and exit settings through scientific quantitative evaluation and optimization, and improves the scientific nature and adaptability of traffic design. This application solves the problem in the prior art that the traffic entrances and exits of the base cannot be accurately set.

Description

Technical Field

[0001] The present invention relates to the field of optimization of base entrance and exit settings, and in particular to a method, device and medium for optimizing base entrance and exit settings. Background Art

[0002] With the rapid development of urban transportation, the design and optimization of traffic entrances and exits have become key factors in ensuring traffic safety and efficiency. Traditional traffic entrance and exit design mainly relies on the experience and intuition of designers and lacks scientific quantitative evaluation methods. The shortcomings of this method are:

[0003] Experience dependence: In existing technologies, the design of the angle between entrances and exits and roads often relies on the personal experience and judgment of designers, which leads to inconsistency and unreliability of design results.

[0004] Lack of scientific and quantitative management: In traffic design, traffic impact assessment and safety assessment, there is a lack of scientific and quantitative management of the angles between entrances and exits and roads, resulting in a lack of unified standards and scientific basis in the design and review management process.

[0005] Safety hazards and efficiency issues: Due to unreasonable design, traffic accidents or traffic congestion may occur, affecting the overall efficiency of urban transportation.

[0006] Inconsistency in improvement measures: When the entrance and exit openings are not designed properly, there is a lack of a scientific and unified approach to developing improvement measures, resulting in large differences in the rationality and feasibility of the improvement plans.

[0007] These influences make it impossible for existing technologies to accurately set the traffic entrances and exits of the base. Summary of the Invention

[0008] The present invention provides a method, device and medium for optimizing the setting of entrances and exits of a base, so as to solve the problem in the prior art that the traffic entrances and exits of the base cannot be accurately set.

[0009] In a first aspect, the present application provides a method for optimizing the entrance and exit settings of a base, comprising:

[0010] According to the preset base entrance and exit setting plan, obtain the base's static traffic data and the base's dynamic traffic data;

[0011] Calculating a minimum angle between the entrance and exit and the road based on a preset driver visual characteristic factor, static traffic data of the base, dynamic traffic data of the base, and a preset first formula;

[0012] Comparing the minimum angle value with an initial value of the angle between the entrance and exit of the base and the road, and if the initial value is greater than or equal to the minimum angle value, calculating the traffic capacity measurement result of the base according to a preset second formula group;

[0013] Setting the traffic capacity thresholds of entrances, exits and connecting roads according to the traffic capacity calculation results;

[0014] Comparing the traffic capacity threshold with a preset traffic demand, if the traffic demand is less than or equal to the traffic capacity threshold, confirming that the preset base entrance and exit setting plan is feasible, and outputting the base entrance and exit setting plan;

[0015] If the initial value is less than the minimum angle value or the traffic demand is greater than the traffic capacity threshold, the preset base entrance and exit and connecting road speed limit scheme is optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting scheme;

[0016] According to the preset optimization conditions, static traffic data of the optimized base entrance and exit setting plan and dynamic traffic data of the base are obtained;

[0017] Calculate the minimum angle between the base entrance and exit and the road and the traffic capacity value based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula, and the preset second formula group, and evaluate the feasibility of the optimized base entrance and exit setting plan;

[0018] If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

[0019] This application obtains the static and dynamic traffic data of the base, and combines the driver's visual characteristics and preset formulas to calculate the minimum angle between the entrance and exit and the road and the traffic capacity. If the initial value of the angle is greater than or equal to the minimum value and the traffic capacity meets the traffic demand, the preset entrance and exit setting plan is confirmed to be feasible; otherwise, the speed limit plan is optimized and the optimized plan is re-evaluated. If the optimized plan still does not meet the conditions, it is determined that the base does not have the opening conditions. This process ensures the rationality and safety of the entrance and exit settings through scientific quantitative evaluation and optimization, and improves the scientific nature and adaptability of traffic design. This application solves the problem in the existing technology that the traffic entrance and exit intersections of the base cannot be accurately set.

[0020] As a preferred embodiment of the first aspect, the preset speed limit schemes for the base entrances and exits and connecting roads are optimized to obtain an optimized base entrance and exit setting scheme, specifically:

[0021] The parameters for optimizing the preset base entrance and exit and connecting road speed limit scheme include the preset base entrance and exit speed limit value and the connecting road speed limit value;

[0022] Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold;

[0023] If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution;

[0024] If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold;

[0025] If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions;

[0026] If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one;

[0027] If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be completed and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions.

[0028] In this preferred embodiment, the present application ensures the rationality and safety of the entrance and exit settings by optimizing the speed limit schemes of the base entrances and exits and connecting roads. First, determine whether the entrance and exit speed limit value is greater than the preset first threshold value. If it is greater, the entrance and exit speed limit value is lowered by a preset gear value, while the connecting road speed limit value remains unchanged, thereby completing the optimization and obtaining the optimized speed limit scheme. If the entrance and exit speed limit value is less than or equal to the first threshold value, it is further determined whether the connecting road speed limit value is greater than the preset second threshold value. If the connecting road speed limit value is less than or equal to the second threshold value, it is confirmed that the entrance and exit do not meet the opening conditions; if it is greater than the second threshold value, the connecting road speed limit value is lowered by a preset gear value, and the number of speed limit reductions is increased by one. If the number of speed limit reductions is less than or equal to two times, the optimization is confirmed to be complete; if it is greater than two times, it is confirmed that the entrance and exit do not meet the opening conditions. This optimization process ensures that the entrance and exit design meets traffic needs while taking into account traffic capacity and traffic safety by gradually adjusting the speed limit value, thereby improving the scientific nature and adaptability of traffic planning.

[0029] As a preferred embodiment of the first aspect, the acquiring of static traffic data and dynamic traffic data of the base is specifically as follows:

[0030] The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road;

[0031] The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

[0032] In this preferred embodiment, the present application obtains static traffic data and dynamic traffic data of the base, and the present invention provides a comprehensive and accurate basis for the optimization of entrance and exit settings. Static traffic data covers key parameters such as the number of lanes, lane width, width of the dividing strip, and initial value of the angle design of the entrance and exit and the connecting road. These data lay the foundation for evaluating the rationality of the geometric design of the entrance and exit. Dynamic traffic data includes the traffic flow and speed limit values ​​of the entrance and exit, as well as the traffic flow and speed values ​​of the connecting road. These data reflect the actual traffic operation conditions and provide a real-time basis for capacity evaluation and speed limit optimization. By combining static and dynamic data, the present application can scientifically evaluate the rationality of the angle between the entrance and exit and the road, and optimize the speed limit scheme accordingly, thereby improving the traffic flow efficiency while ensuring traffic safety. This process not only improves the scientific nature and adaptability of the entrance and exit design, but also enhances the flexibility and safety of traffic planning through quantitative evaluation and optimization.

[0033] As a preferred embodiment of the first aspect, the minimum angle between the initial entrance and exit and the road is calculated based on the preset driver visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and a preset first formula, specifically:

[0034] The preset first formula is: ;

[0035] Where, 、 S are the field of view angles of the driver of the vehicle that needs to turn right and the vehicle that needs to turn left when exiting the base respectively; ar 、S al S are the parking sight distances for vehicles turning right and turning left at the entrance and exit of the base respectively; br 、S bl are the stopping sight distances for vehicles coming from the left and right of the connecting road of the base respectively; is the initial value of the angle between the entrance and exit of the preset base and the road; is the minimum value of the angle between the initial entrance and exit and the road;

[0036] According to the preset first formula, the minimum angle value between the initial entrance and exit and the road is calculated.

[0037] In this preferred embodiment, the present application comprehensively considers the driver's visual characteristics, static and dynamic traffic data at the base, and applies a preset first formula to accurately calculate the minimum angle between the initial entrance and exit and the road. This formula incorporates key parameters such as the driver's field of view and stopping sight distance, ensuring the scientific and practical nature of the calculation results.

[0038] As a preferred embodiment of the first aspect, the traffic capacity measurement result of the base is calculated according to the preset second formula group, specifically:

[0039] Calculate the traffic capacity of the base entrance and exit connecting road and the base entrance and exit according to the preset second formula group;

[0040] The capacity of the connecting road at the base entrance and exit is based on the maximum capacity value of the connecting road under the parking sight distance of the vehicle;

[0041] The base entrance and exit traffic capacity value is the minimum value of the maximum traffic capacity based on the minimum stopping sight distance for vehicles exiting the entrance and exit and the maximum traffic capacity value based on the gap that can be inserted into the connecting road.

[0042] The preset second formula group is specifically:

[0043] ;

[0044] Where S i V is the safe parking sight distance for vehicles at the entrance and exit of the base and the connecting roads; i is the speed of vehicles on the entrances and exits of the base and the connecting roads; t is the driver's braking reaction time; h is the friction coefficient between the road surface and the tires of the entrance and exit roads of the base; i is the longitudinal slope of the access road to the base; k is the braking coefficient; It is the minimum safe distance between the car and the obstacle after it stops completely; i is the traffic number;

[0045] ;

[0046] Where, is the maximum traffic capacity value under the safe parking sight distance of the base; Provide safe parking sight distance for vehicles connecting to the base entrance and exit roads; The speed of vehicles on the roads connecting the base entrances and exits;

[0047]

[0048] is the maximum traffic capacity of the entrance and exit of the base;

[0049] Provide safe parking sight distance for base entrances and exits; The speed of vehicles at the entrance and exit of the base; A critical gap can be inserted for external road traffic. It is the headway time of vehicles entering the external road at the entrance and exit.

[0050] In this preferred embodiment, the present application applies a second set of preset formulas to calculate the maximum capacity of the base at minimum stopping sight distance, as well as the minimum capacity of the entrance and exit based on stopping sight distance. This calculation process considers the impact of stopping sight distance on capacity, providing a scientific basis for assessing whether the base has the conditions for entrance and exit opening. Specifically, the maximum capacity at minimum stopping sight distance ensures that vehicles can still pass through the entrance and exit safely and efficiently under the most unfavorable conditions; while the minimum capacity of the entrance and exit based on stopping sight distance ensures that the entrance and exit design has sufficient capacity while meeting safety requirements.

[0051] In a second aspect, the present application provides a device for optimizing the entrance and exit settings of a base. The device for optimizing the entrance and exit settings of a base includes an acquisition module, an evaluation module, and an optimization module:

[0052] The acquisition module is used to obtain the static traffic data and dynamic traffic data of the base according to the preset base entrance and exit setting plan;

[0053] The evaluation module is used to calculate the minimum angle between the entrance and exit and the road based on the preset driver's visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and a preset first formula;

[0054] Comparing the minimum angle value with an initial value of the angle between the entrance and exit of the base and the road, and if the initial value is greater than or equal to the minimum angle value, calculating the traffic capacity measurement result of the base according to a preset second formula group;

[0055] Setting the traffic capacity thresholds of entrances, exits and connecting roads according to the traffic capacity calculation results;

[0056] Comparing the traffic capacity threshold with a preset traffic demand, if the traffic demand is less than or equal to the traffic capacity threshold, the preset base entrance and exit setting plan is feasible; outputting the base entrance and exit setting plan;

[0057] If the initial value is less than the minimum angle value or the traffic demand is greater than the traffic capacity threshold, the preset base entrance and exit and connecting road speed limit scheme is optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting scheme;

[0058] The optimization module is used to obtain the static traffic data of the optimized base entrance and exit setting plan and the dynamic traffic data of the base according to the preset optimization conditions;

[0059] Calculate the minimum angle between the base entrance and exit and the road and the traffic capacity value based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula, and the preset second formula group, and evaluate the feasibility of the optimized base entrance and exit setting plan;

[0060] If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

[0061] This device uses three modules to divide the work and coordinate the work to accurately provide traffic entrance and exit setting plans. This application obtains the static and dynamic traffic data of the base, and combines the driver's visual characteristics and preset formulas to calculate the minimum value of the angle between the entrance and exit and the road and the traffic capacity. If the initial value of the angle is greater than or equal to the minimum value and the traffic capacity meets the traffic needs, the preset entrance and exit setting plan is confirmed to be feasible; otherwise, the speed limit plan is optimized and the optimized plan is re-evaluated. If the optimized plan still does not meet the conditions, it is determined that the base does not have the opening conditions. This process ensures the rationality and safety of the entrance and exit settings through scientific quantitative evaluation and optimization, and improves the scientificity and adaptability of traffic design. This application solves the problem in the existing technology that the traffic entrance and exit intersections of the base cannot be accurately set.

[0062] As a preferred embodiment of the second aspect, the preset base entrance and exit and connecting road speed limit scheme is optimized to obtain an optimized base entrance and exit setting scheme, specifically:

[0063] The parameters for optimizing the preset base entrance and exit and connecting road speed limit scheme include the preset base entrance and exit speed limit value and the connecting road speed limit value;

[0064] Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold;

[0065] If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution;

[0066] If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold;

[0067] If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions;

[0068] If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one;

[0069] If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be completed and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions.

[0070] In this preferred embodiment, the present application ensures the rationality and safety of the entrance and exit settings by optimizing the speed limit schemes of the base entrances and exits and connecting roads. First, determine whether the entrance and exit speed limit value is greater than the preset first threshold value. If it is greater, the entrance and exit speed limit value is lowered by a preset gear value, while the connecting road speed limit value remains unchanged, thereby completing the optimization and obtaining the optimized speed limit scheme. If the entrance and exit speed limit value is less than or equal to the first threshold value, it is further determined whether the connecting road speed limit value is greater than the preset second threshold value. If the connecting road speed limit value is less than or equal to the second threshold value, it is confirmed that the entrance and exit do not meet the opening conditions; if it is greater than the second threshold value, the connecting road speed limit value is lowered by a preset gear value, and the number of speed limit reductions is increased by one. If the number of speed limit reductions is less than or equal to two times, the optimization is confirmed to be complete; if it is greater than two times, it is confirmed that the entrance and exit do not meet the opening conditions. This optimization process ensures that the entrance and exit design meets traffic needs while taking into account traffic capacity and traffic safety by gradually adjusting the speed limit value, thereby improving the scientific nature and adaptability of traffic planning.

[0071] As a preferred embodiment of the second aspect, the acquiring of static traffic data and dynamic traffic data of the base is specifically as follows:

[0072] The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road;

[0073] The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

[0074] In a third aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium including a stored computer program. When the computer program is executed, the device containing the computer-readable storage medium is controlled to execute the method for optimizing the entrance and exit settings of a base. The beneficial effects thereof are the same as those of the method for optimizing the entrance and exit settings of a base provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 : A flow chart of an embodiment of a method for optimizing the setting of entrances and exits of a base provided in this application;

[0076] Figure 2 : A flow chart of an embodiment of the traffic entrance and exit setting process provided by this application;

[0077] Figure 3 : A structural diagram of an embodiment of the sight triangle provided by this application;

[0078] Figure 4 : A structural diagram of an embodiment of sight triangle measurement provided by this application;

[0079] Figure 5 : A flow chart of an embodiment of the inlet and outlet key parameter optimization process provided by this application;

[0080] Figure 6 : A structural diagram of an embodiment of an optimization device provided at the base entrance and exit provided in this application. DETAILED DESCRIPTION

[0081] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0082] Example 1

[0083] Please refer to Figure 1 , which is an optimization method for base entrance and exit settings provided by an embodiment of the present invention.

[0084] In this embodiment, the process of the optimization method for the base entrance and exit settings in this application is described in detail through steps S01-S08.

[0085] like Figure 2 As shown, this is the process of setting up the traffic entrances and exits of the base in this application:

[0086] S01: According to the preset base entrance and exit setting plan, obtain the base's static traffic data and the base's dynamic traffic data.

[0087] As a preferred embodiment of the first embodiment, the acquisition of static traffic data and dynamic traffic data of the base is specifically as follows:

[0088] The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road;

[0089] The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

[0090] In this preferred embodiment, the present application obtains static traffic data and dynamic traffic data of the base, and the present invention provides a comprehensive and accurate basis for the optimization of entrance and exit settings. Static traffic data covers key parameters such as the number of lanes, lane width, width of the dividing strip, and initial value of the angle design of the entrance and exit and the connecting road. These data lay the foundation for evaluating the rationality of the geometric design of the entrance and exit. Dynamic traffic data includes the traffic flow and speed limit values ​​of the entrance and exit, as well as the traffic flow and speed values ​​of the connecting road. These data reflect the actual traffic operation conditions and provide a real-time basis for capacity evaluation and speed limit optimization. By combining static and dynamic data, the present application can scientifically evaluate the rationality of the angle between the entrance and exit and the road, and optimize the speed limit scheme accordingly, thereby improving the traffic flow efficiency while ensuring traffic safety. This process not only improves the scientific nature and adaptability of the entrance and exit design, but also enhances the flexibility and safety of traffic planning through quantitative evaluation and optimization.

[0091] S02: Calculating a minimum angle between the entrance and exit and the road based on a preset driver visual characteristic factor, static traffic data of the base, dynamic traffic data of the base, and a preset first formula.

[0092] As a preferred embodiment of the first embodiment, the minimum angle between the entrance and exit and the road is calculated based on the preset driver visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and the preset first formula, specifically:

[0093] According to the initial design value of the angle between the entrance and exit and the road , select the corresponding formula for vehicles turning left and right at the entrance and exit (the preset first formula) to calculate the minimum value of the entrance and exit angle, and obtain the limit minimum value .

[0094]

[0095] Where: S ar 、S al are the stopping sight distances for vehicles turning right and turning left at the entrance and exit, respectively, m; S br 、S bl are the stopping sight distances for vehicles coming from the left side of the connecting road (vehicles that need to be observed by right-turning vehicles when exiting the entrance) and vehicles coming from the right side (vehicles that need to be observed by left-turning vehicles when exiting the entrance), in meters; Figure 3 As shown; 、 They are the field of view angles of the driver of the vehicle that needs to turn right and the vehicle that needs to turn left when exiting the entrance, and both values ​​are 100 degrees. Figure 4 As shown, θ is the intersection angle between the entrance and exit and the road, is the initial design value of the intersection angle between the entrance and exit and the road, ( May not be reflected in Figure 4 middle, is one of the cases of θ) The unit is degrees.

[0096] The calculation model of the angle limit between the entrance and exit and the road is:

[0097] ;

[0098] Where: The maximum viewing angle on one side when the driver turns his head comfortably and safely, degrees; is the minimum angle between the entrance and exit and the road under the current design speed limit, in degrees; S a S is the stopping sight distance for vehicles exiting the entrance; b Stopping sight distance for oncoming vehicles on the connecting road, m;

[0099] The maximum angle of head rotation from the natural state of the human body and the horizontal rotation angle of the head and eyeballs in the natural state According to the results of Ergonomics (Xiang Yinghua, Beijing Institute of Technology Press) and Research on BRT Driver Visibility Area Based on Human Factors Engineering (Bi Jun, Sichuan University Press), the maximum angle of head rotation in the natural state of the human body is The value is 50 degrees; according to the results of ("Research on the Design Method and Evaluation System of High-grade Highway Landscape" by Peng Wei, Journal of Chang'an University), the horizontal rotation angle of the head and eyeballs in the natural state of the human body is The value is 50 degrees. In summary, the maximum viewing angle on one side when the driver turns his head comfortably and safely The value is 100 degrees.

[0100] ;

[0101] In this preferred embodiment, the present application calculates the minimum angle between the base entrance and the road by applying a preset first formula, which comprehensively considers the driver's field of view angle (all 100 degrees), the stopping sight distance of the vehicle exiting the entrance (S ar 、S al ) and the stopping sight distance for vehicles coming from the connecting road (S br 、S bl This approach ensures that entrance and exit designs meet drivers' visual needs and safety standards, thereby improving the scientific nature and safety of traffic design. By accurately calculating the minimum angle, this application optimizes entrance and exit settings, improving traffic flow efficiency and overall traffic safety.

[0102] S03: Compare the minimum angle value with the initial value of the angle between the entrance and exit of the preset base and the road. If the initial value is greater than or equal to the minimum angle value, calculate the traffic capacity measurement result of the base according to the preset second formula group.

[0103] As a preferred embodiment of the first embodiment, if the initial value is greater than or equal to the minimum angle value, the capacity measurement result of the base is calculated according to the preset second formula group, specifically:

[0104] According to the preset second formula group, the traffic capacity values ​​of the base entrance and exit connecting road and the base entrance and exit are calculated.

[0105] The capacity of the base entrance and exit connecting roads is based on the maximum capacity value of the connecting roads at the stopping sight distance of vehicles;

[0106] The traffic capacity value of the base entrance and exit is the minimum value of the maximum traffic capacity based on the minimum stopping sight distance of vehicles exiting the entrance and exit and the maximum traffic capacity value based on the gap that can be inserted into the connecting road;

[0107] The second formula group is:

[0108] The initial traffic capacity Q of the connecting road of the base b It is the maximum traffic capacity value under the minimum stopping sight distance of vehicles approaching from the connecting road of the base; the traffic capacity Q a It is the minimum value of the maximum vehicle-insertion gap capacity of the base's connecting roads and the capacity of the base's entrances and exits based on the parking sight distance.

[0109] ;

[0110] ;

[0111]

[0112] Where S i is the safe stopping sight distance for vehicles at the entrance and exit of the base and the connecting roads, m; V i is the speed of vehicles on the entrance and exit of the base and the connecting roads, km / h; t is the driver's braking reaction time, s; h is the friction coefficient between the road surface and the tires of the entrance and exit roads of the base; i is the longitudinal slope of the access road to the base; k is the braking coefficient; It is the minimum safe distance between a car and an obstacle after it has come to a complete stop, in meters; i is the traffic flow number, which can be a (vehicles exiting the entrance or exit) or b (vehicles conflicting with the main road).

[0113] Where, is the maximum traffic capacity value at the safe stopping sight distance of the base, pcu / h; The safe parking sight distance for vehicles connecting the base entrance and exit roads, m; The speed of vehicles on the roads connecting the base entrances and exits, km / h;

[0114] is the maximum traffic capacity of the entrance and exit of the base;

[0115] is the safe parking sight distance at the base entrance and exit, m; is the speed of vehicles at the entrance and exit of the base, km / h; The critical gap that can be inserted into the external road traffic flow, s, is the headway time of vehicles at the entrance and exit entering the external road, s.

[0116] In this preferred embodiment, the present application applies a second set of preset formulas to calculate the maximum capacity of the base at minimum stopping sight distance, as well as the minimum capacity of the entrance and exit based on stopping sight distance. This calculation process considers the impact of stopping sight distance on capacity, providing a scientific basis for assessing whether the base has the conditions for entrance and exit opening. Specifically, the maximum capacity at minimum stopping sight distance ensures that vehicles can still pass through the entrance and exit safely and efficiently under the most unfavorable conditions; while the minimum capacity of the entrance and exit based on stopping sight distance ensures that the entrance and exit design has sufficient capacity while meeting safety requirements.

[0117] S04: Setting the traffic capacity thresholds of the entrances, exits and connecting roads according to the traffic capacity calculation results.

[0118] S05: Compare the traffic capacity threshold with the preset traffic demand. If the traffic demand is less than or equal to the traffic capacity threshold, confirm that the preset base entrance and exit setting plan is feasible, and output the base entrance and exit setting plan.

[0119] S06: If the initial value is less than the minimum angle value or the traffic demand is greater than the traffic capacity threshold, the preset base entrance and exit and connecting road speed limit plan is optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting plan.

[0120] As a preferred embodiment of the first embodiment, if the initial value is less than the minimum angle value or the traffic demand is greater than the capacity threshold, the preset base entrance and exit and connecting road speed limit schemes are optimized according to preset optimization conditions to obtain an optimized base entrance and exit setting scheme, specifically:

[0121] like Figure 5 As shown, the key parameter optimization process is to optimize and adjust the speed limit of vehicles exiting the entrance and exit and the speed limit of vehicles on the connecting road based on the traffic capacity of the entrance and exit, and then optimize the angle between the entrance and exit and the road;

[0122] Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold;

[0123] If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution;

[0124] If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold;

[0125] If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions;

[0126] If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one;

[0127] If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be completed and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions.

[0128] Among them, the exit speed limit value V aThe value is a multiple of 5km / h, divided into 4 levels: 5km / h, 10km / h, 15km / h, and 20km / h; the connecting road speed limit value V b The value is a multiple of 10km / h, divided into 6 levels: 20km / h, 30km / h, 40km / h, 50km / h, and 60km / h. The higher the speed, the higher the level, and each level is a value. The specific key parameter optimization steps include:

[0129] 4.1.1. Evaluate the exit speed limit V at the entrance and exit a Is it greater than 5km / h? a >5km / h, then go to step 4.1.2. If V a ≤5km / h, proceed to step 4.1.4;

[0130] 4.1.2. When exiting an entrance, reduce the speed limit Va by one gear and connect to road V b remain unchanged;

[0131] 4.1.3. Calculate the angle between the entrance and exit and the road to obtain the new minimum angle value , the angle between the entrance and exit and the connecting road ≥ , then enter the capacity calculation model calculation step 4.1.6; < , then return to step 4.1.1;

[0132] 4.1.4 Determining the speed limit V of the connecting road b Is it greater than 20km / h? b ≤20km / h, the entrance and exit do not meet the opening conditions, go directly to step 4.1.7; if V b >20km / h, if go to step 4.1.5;

[0133] 4.1.5 When V b >20km / h, the exit speed limit Va remains unchanged, and the connecting road V b Downshift one gear, V b Vehicle speed downshift number E b +1 (downshift number E b The initial value is 0). If E b >2, the entrance and exit do not meet the opening conditions, go directly to step 4.1.7; if E b If ≤2, proceed to step 4.1.6 of the capacity model calculation;

[0134] 4.1.6. Calculate the capacity model formula to obtain the exit capacity Q after optimizing the key parameters. a and connecting road capacity Q b, compare and judge the measurement results:

[0135] When q a ≤ Q a *0.9 and q b ≤ Q b *0.8, the opening conditions are met and go directly to step 4.1.7;

[0136] When q a >Q a *0.9 or q b >Q b *0.8, go directly to step 4.1.1;

[0137] 4.1.7 Connecting Road Speed ​​V b ,q b , Q b The speed V of the vehicle on the connecting road in the sight triangle where the exiting vehicle needs to turn right br ,q br Q br The rationality of the angle between the entrance and exit and the road is determined as shown in the following table:

[0138]

[0139] In this preferred embodiment, when evaluating the angle between the entrance and exit and the road, if the calculated minimum angle is less than the minimum value, it indicates that the current design may affect traffic safety and efficiency. Therefore, by optimizing the preset key speed limit parameters, vehicle speeds are adjusted to accommodate the smaller angle, ensuring the safety and smoothness of traffic flow. This optimization process not only improves the flexibility and adaptability of the design, but also improves the overall performance of the transportation system by scientifically adjusting the speed limit parameters, thereby maximizing traffic flow capacity while ensuring safety.

[0140] S07: According to the preset optimization conditions, the static traffic data of the optimized base entrance and exit setting plan and the dynamic traffic data of the base are obtained.

[0141] S08: Based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula and the preset second formula group, the minimum angle between the base entrance and exit and the road and the traffic capacity value are calculated to evaluate the feasibility of the optimized base entrance and exit setting plan.

[0142] S09: If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

[0143] This application obtains the static and dynamic traffic data of the base, and combines the driver's visual characteristics and preset formulas to calculate the minimum angle between the entrance and exit and the road and the traffic capacity. If the initial value of the angle is greater than or equal to the minimum value and the traffic capacity meets the traffic demand, the preset entrance and exit setting plan is confirmed to be feasible; otherwise, the speed limit plan is optimized and the optimized plan is re-evaluated. If the optimized plan still does not meet the conditions, it is determined that the base does not have the opening conditions. This process ensures the rationality and safety of the entrance and exit settings through scientific quantitative evaluation and optimization, and improves the scientific nature and adaptability of traffic design. This application solves the problem in the existing technology that the traffic entrance and exit intersections of the base cannot be accurately set.

[0144] Example 2

[0145] Please refer to Figure 6 , which is an optimization device for the entrance and exit settings of a base provided in an embodiment of the present application.

[0146] In this embodiment, the optimization device for the base entrance and exit settings includes an acquisition module 10 , an evaluation module 20 and an optimization module 30 .

[0147] like Figure 2 As shown, this is the process of setting up the traffic entrances and exits of the base in this application:

[0148] The acquisition module 10 is used to acquire the static traffic data and the dynamic traffic data of the base according to a preset base entrance and exit setting plan.

[0149] As a preferred embodiment of the second embodiment, the acquisition of static traffic data and dynamic traffic data of the base is specifically as follows:

[0150] The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road;

[0151] The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

[0152] In this preferred embodiment, the present application obtains static traffic data and dynamic traffic data of the base, and the present invention provides a comprehensive and accurate basis for the optimization of entrance and exit settings. Static traffic data covers key parameters such as the number of lanes, lane width, width of the dividing strip, and initial value of the angle design of the entrance and exit and the connecting road. These data lay the foundation for evaluating the rationality of the geometric design of the entrance and exit. Dynamic traffic data includes the traffic flow and speed limit values ​​of the entrance and exit, as well as the traffic flow and speed values ​​of the connecting road. These data reflect the actual traffic operation conditions and provide a real-time basis for capacity evaluation and speed limit optimization. By combining static and dynamic data, the present application can scientifically evaluate the rationality of the angle between the entrance and exit and the road, and optimize the speed limit scheme accordingly, thereby improving the traffic flow efficiency while ensuring traffic safety. This process not only improves the scientific nature and adaptability of the entrance and exit design, but also enhances the flexibility and safety of traffic planning through quantitative evaluation and optimization.

[0153] The evaluation module 20 is used to calculate the minimum angle between the entrance and exit and the road based on the preset driver's visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base and a preset first formula.

[0154] As a preferred embodiment of the second embodiment, the minimum angle between the entrance and exit and the road is calculated based on the preset driver visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and the preset first formula, specifically:

[0155] According to the initial design value of the angle between the entrance and exit and the road , select the corresponding formula for vehicles turning left and right at the entrance and exit (the preset first formula) to calculate the minimum value of the entrance and exit angle, and obtain the limit minimum value .

[0156]

[0157] Where: S ar 、S al are the stopping sight distances for vehicles turning right and turning left at the entrance and exit, respectively, m; S br 、S bl are the stopping sight distances for vehicles coming from the left side of the connecting road (vehicles that need to be observed by right-turning vehicles when exiting the entrance) and vehicles coming from the right side (vehicles that need to be observed by left-turning vehicles when exiting the entrance), in meters; Figure 3 As shown; 、 They are the field of view angles of the driver of the vehicle that needs to turn right and the vehicle that needs to turn left when exiting the entrance, and both values ​​are 100 degrees. Figure 4 As shown, θ is the intersection angle between the entrance and exit and the road, is the initial design value of the intersection angle between the entrance and exit and the road, ( May not be reflected in Figure 4 middle, is one of the cases of θ) The unit is degrees.

[0158] The calculation model of the angle limit between the entrance and exit and the road is:

[0159] ;

[0160] Where: The maximum viewing angle on one side when the driver turns his head comfortably and safely, degrees; is the minimum angle between the entrance and exit and the road under the current design speed limit, in degrees; S a S is the stopping sight distance for vehicles exiting the entrance; b Stopping sight distance for oncoming vehicles on the connecting road, m;

[0161] The maximum angle of head rotation from the natural state of the human body and the horizontal rotation angle of the head and eyeballs in the natural state According to the results of Ergonomics (Xiang Yinghua, Beijing Institute of Technology Press) and Research on BRT Driver Visibility Area Based on Human Factors Engineering (Bi Jun, Sichuan University Press), the maximum angle of head rotation in the natural state of the human body is The value is 50 degrees; according to the results of ("Research on the Design Method and Evaluation System of High-grade Highway Landscape" by Peng Wei, Journal of Chang'an University), the horizontal rotation angle of the head and eyeballs in the natural state of the human body is The value is 50 degrees. In summary, the maximum viewing angle on one side when the driver turns his head comfortably and safely The value is 100 degrees.

[0162] ;

[0163] In this preferred embodiment, the present application calculates the minimum angle between the base entrance and the road by applying a preset first formula, which comprehensively considers the driver's field of view angle (all 100 degrees), the stopping sight distance of the vehicle exiting the entrance (S ar 、S al ) and the stopping sight distance for vehicles coming from the connecting road (S br 、S bl This approach ensures that entrance and exit designs meet drivers' visual needs and safety standards, thereby improving the scientific nature and safety of traffic design. By accurately calculating the minimum angle, this application optimizes entrance and exit settings, improving traffic flow efficiency and overall traffic safety.

[0164] The evaluation module 20 is also used to compare the minimum angle value with the initial value of the angle between the entrance and exit of the preset base and the road. If the initial value is greater than or equal to the minimum angle value, the traffic capacity measurement result of the base is calculated according to the preset second formula group.

[0165] As a preferred embodiment of the second embodiment, if the initial value is greater than or equal to the minimum angle value, the capacity measurement result of the base is calculated according to the preset second formula group, specifically:

[0166] According to the preset second formula group, the traffic capacity values ​​of the base entrance and exit connecting road and the base entrance and exit are calculated.

[0167] The capacity of the base entrance and exit connecting roads is based on the maximum capacity value of the connecting roads at the stopping sight distance of vehicles;

[0168] The traffic capacity value of the base entrance and exit is the minimum value of the maximum traffic capacity based on the minimum stopping sight distance of vehicles exiting the entrance and exit and the maximum traffic capacity value based on the gap that can be inserted into the connecting road;

[0169] The second formula group is:

[0170] The initial traffic capacity Q of the connecting road of the base b It is the maximum traffic capacity value under the minimum stopping sight distance of vehicles approaching from the connecting road of the base; the traffic capacity Q a It is the minimum value of the maximum vehicle-insertion gap capacity of the base's connecting roads and the capacity of the base's entrances and exits based on the parking sight distance.

[0171] ;

[0172] ;

[0173]

[0174] Where S i is the safe stopping sight distance for vehicles at the entrance and exit of the base and the connecting roads, m; V i is the speed of vehicles on the entrance and exit of the base and the connecting roads, km / h; t is the driver's braking reaction time, s; h is the friction coefficient between the road surface and the tires of the entrance and exit roads of the base; i is the longitudinal slope of the access road to the base; k is the braking coefficient; It is the minimum safe distance between a car and an obstacle after it has come to a complete stop, in meters; i is the traffic flow number, which can be a (vehicles exiting the entrance or exit) or b (vehicles conflicting with the main road).

[0175] Where, is the maximum traffic capacity value at the safe stopping sight distance of the base, pcu / h; The safe parking sight distance for vehicles connecting the base entrance and exit roads, m; The speed of vehicles on the roads connecting the base entrances and exits, km / h;

[0176] is the maximum traffic capacity of the entrance and exit of the base;

[0177] is the safe parking sight distance at the base entrance and exit, m; is the speed of vehicles at the entrance and exit of the base, km / h; The critical gap that can be inserted into the external road traffic flow, s, is the headway time of vehicles at the entrance and exit entering the external road, s.

[0178] In this preferred embodiment, the present application applies a second set of preset formulas to calculate the maximum capacity of the base at minimum stopping sight distance, as well as the minimum capacity of the entrance and exit based on stopping sight distance. This calculation process considers the impact of stopping sight distance on capacity, providing a scientific basis for assessing whether the base has the conditions for entrance and exit opening. Specifically, the maximum capacity at minimum stopping sight distance ensures that vehicles can still pass through the entrance and exit safely and efficiently under the most unfavorable conditions; while the minimum capacity of the entrance and exit based on stopping sight distance ensures that the entrance and exit design has sufficient capacity while meeting safety requirements.

[0179] The evaluation module 20 is further configured to set the traffic capacity thresholds of the entrances and exits and connecting roads according to the traffic capacity calculation results;

[0180] Comparing the traffic capacity threshold with a preset traffic demand, if the traffic demand is less than or equal to the traffic capacity threshold, confirming that the preset base entrance and exit setting plan is feasible, and outputting the base entrance and exit setting plan;

[0181] If the initial value is less than the minimum angle value or the traffic demand is greater than the traffic capacity threshold, the preset base entrances and exits and connecting road speed limit schemes are optimized according to preset optimization conditions to obtain an optimized base entrance and exit setting scheme.

[0182] As a preferred embodiment of the second embodiment, if the initial value is less than the minimum angle value or the traffic demand is greater than the capacity threshold, the preset base entrance and exit and connecting road speed limit scheme is optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting scheme, specifically:

[0183] like Figure 5 As shown, the key parameter optimization process is to optimize and adjust the speed limit of vehicles exiting the entrance and exit and the speed limit of vehicles on the connecting road based on the traffic capacity of the entrance and exit, and then optimize the angle between the entrance and exit and the road;

[0184] Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold;

[0185] If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution;

[0186] If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold;

[0187] If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions;

[0188] If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one;

[0189] If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be completed and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions.

[0190] Among them, the exit speed limit value V a The value is a multiple of 5km / h, divided into 4 levels: 5km / h, 10km / h, 15km / h, and 20km / h; the connecting road speed limit value V b The value is a multiple of 10km / h, divided into 6 levels: 20km / h, 30km / h, 40km / h, 50km / h, and 60km / h. The higher the speed, the higher the level, and each level is a value. The specific key parameter optimization steps include:

[0191] 4.1.1. Evaluate the exit speed limit V at the entrance and exit a Is it greater than 5km / h? a >5km / h, then go to step 4.1.2. If V a ≤5km / h, proceed to step 4.1.4;

[0192] 4.1.2. When exiting an entrance, reduce the speed limit Va by one gear and connect to road V b remain unchanged;

[0193] 4.1.3. Calculate the angle between the entrance and exit and the road to obtain the new minimum angle value , the angle between the entrance and exit and the connecting road ≥ , then enter the capacity calculation model calculation step 4.1.6; < , then return to step 4.1.1;

[0194] 4.1.4 Determining the speed limit V of the connecting road b Is it greater than 20km / h? b ≤20km / h, the entrance and exit do not meet the opening conditions, go directly to step 4.1.7; if V b >20km / h, if go to step 4.1.5;

[0195] 4.1.5 When V b >20km / h, the exit speed limit Va remains unchanged, and the connecting road V b Downshift one gear, V b Vehicle speed downshift number E b +1 (downshift number E b The initial value is 0). If E b >2, the entrance and exit do not meet the opening conditions, go directly to step 4.1.7; if E b If ≤2, proceed to step 4.1.6 of the capacity model calculation;

[0196] 4.1.6. Calculate the capacity model formula to obtain the exit capacity Q after optimizing the key parameters. a and connecting road capacity Q b , compare and judge the measurement results:

[0197] When q a ≤ Q a *0.9 and q b ≤ Q b *0.8, the opening conditions are met and go directly to step 4.1.7;

[0198] When q a >Q a *0.9 or q b >Q b *0.8, go directly to step 4.1.1;

[0199] 4.1.7 Connecting Road Speed ​​V b ,q b , Q b The speed V of the vehicle on the connecting road in the sight triangle where the exiting vehicle needs to turn right br ,q br Qbr The rationality of the angle between the entrance and exit and the road is determined as shown in the following table:

[0200]

[0201] In this preferred embodiment, when evaluating the angle between the entrance and exit and the road, if the calculated minimum angle is less than the minimum value, it indicates that the current design may affect traffic safety and efficiency. Therefore, by optimizing the preset key speed limit parameters, vehicle speeds are adjusted to accommodate the smaller angle, ensuring the safety and smoothness of traffic flow. This optimization process not only improves the flexibility and adaptability of the design, but also improves the overall performance of the transportation system by scientifically adjusting the speed limit parameters, thereby maximizing traffic flow capacity while ensuring safety.

[0202] The optimization module 30 is used to obtain the static traffic data of the optimized base entrance and exit setting plan and the dynamic traffic data of the base according to the preset optimization conditions;

[0203] Calculate the minimum angle between the base entrance and exit and the road and the traffic capacity value based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula, and the preset second formula group, and evaluate the feasibility of the optimized base entrance and exit setting plan;

[0204] If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

[0205] This application obtains the static and dynamic traffic data of the base, and combines the driver's visual characteristics and preset formulas to calculate the minimum angle between the entrance and exit and the road and the traffic capacity. If the initial value of the angle is greater than or equal to the minimum value and the traffic capacity meets the traffic demand, the preset entrance and exit setting plan is confirmed to be feasible; otherwise, the speed limit plan is optimized and the optimized plan is re-evaluated. If the optimized plan still does not meet the conditions, it is determined that the base does not have the opening conditions. This process ensures the rationality and safety of the entrance and exit settings through scientific quantitative evaluation and optimization, and improves the scientific nature and adaptability of traffic design. This application solves the problem in the existing technology that the traffic entrance and exit intersections of the base cannot be accurately set.

[0206] Example 3:

[0207] An embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device containing the computer-readable storage medium is controlled to execute the method for optimizing the setting of entrances and exits of a base;

[0208] The method for optimizing base entrance and exit settings, if implemented as a software functional unit and used as a standalone product, can be stored in a computer-readable storage medium. Based on this understanding, the present invention can also implement all or part of the process steps in the above-mentioned method embodiments by using a computer program to instruct the relevant hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard drive, a magnetic disk, an optical disk, computer memory, read-only memory (ROM), random access memory (RAM), an electrical carrier signal, a telecommunications signal, and software distribution media.

[0209] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for optimizing the entrance and exit settings of a base, characterized in that: include: According to the preset base entrance and exit setting plan, obtain the base's static traffic data and the base's dynamic traffic data; Calculating a minimum angle between the entrance and exit and the road based on a preset driver visual characteristic factor, static traffic data of the base, dynamic traffic data of the base, and a preset first formula; Comparing the minimum angle value with an initial value of the angle between the entrance and exit of the base and the road, and if the initial value is greater than or equal to the minimum angle value, calculating the traffic capacity measurement result of the base according to a preset second formula group; Setting the traffic capacity thresholds of entrances, exits and connecting roads according to the traffic capacity calculation results; Comparing the traffic capacity threshold with a preset traffic demand, if the traffic demand is less than or equal to the traffic capacity threshold, confirming that the preset base entrance and exit setting plan is feasible, and outputting the base entrance and exit setting plan; If the initial value is less than the minimum angle value or the traffic demand is greater than the capacity threshold, the preset base entrance and exit and connecting road speed limit schemes are optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting scheme, specifically: The parameters for optimizing the preset base entrance and exit and connecting road speed limit scheme include the preset base entrance and exit speed limit value and the connecting road speed limit value; Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold; If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution; If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold; If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions; If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one; If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be complete, and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions; According to the preset optimization conditions, static traffic data of the optimized base entrance and exit setting plan and dynamic traffic data of the base are obtained; Calculate the minimum angle between the base entrance and exit and the road and the traffic capacity value based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula, and the preset second formula group, and evaluate the feasibility of the optimized base entrance and exit setting plan; If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

2. The optimization method for base entrance and exit settings according to claim 1, characterized in that: The acquisition of the static traffic data and the dynamic traffic data of the base is specifically as follows: The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road; The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

3. The optimization method for base entrance and exit settings according to claim 1, characterized in that: The minimum angle between the initial entrance and exit and the road is calculated based on the preset driver visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and the preset first formula, specifically: The preset first formula is: ; Where, 、 S are the field of view angles of the driver of the vehicle that needs to turn right and the vehicle that needs to turn left when exiting the base respectively; ar 、S al S are the parking sight distances for vehicles turning right and turning left at the entrance and exit of the base respectively; br 、S bl are the stopping sight distances for vehicles coming from the left and right of the connecting road of the base respectively; is the initial value of the angle between the entrance and exit of the preset base and the road; is the minimum value of the angle between the initial entrance and exit and the road; According to the preset first formula, the minimum angle value between the initial entrance and exit and the road is calculated.

4. The optimization method for base entrance and exit settings according to claim 1, characterized in that: The traffic capacity measurement result of the base is calculated according to the preset second formula group, specifically: Calculate the traffic capacity of the base entrance and exit connecting road and the base entrance and exit according to the preset second formula group; The capacity of the connecting road at the base entrance and exit is based on the maximum capacity value of the connecting road under the parking sight distance of the vehicle; The base entrance and exit traffic capacity value is the minimum value of the maximum traffic capacity based on the minimum stopping sight distance for vehicles exiting the entrance and exit and the maximum traffic capacity value based on the gap that can be inserted into the connecting road.

5. An optimization device for the entrance and exit settings of a base, characterized in that: Including acquisition module, evaluation module and optimization module: The acquisition module is used to obtain the static traffic data and dynamic traffic data of the base according to the preset base entrance and exit setting plan; The evaluation module is used to calculate the minimum angle between the entrance and exit and the road based on the preset driver's visual characteristic factors, the static traffic data of the base, the dynamic traffic data of the base, and a preset first formula; Comparing the minimum angle value with an initial value of the angle between the entrance and exit of the base and the road, and if the initial value is greater than or equal to the minimum angle value, calculating the traffic capacity measurement result of the base according to a preset second formula group; Setting the traffic capacity thresholds of entrances, exits and connecting roads according to the traffic capacity calculation results; Comparing the traffic capacity threshold with a preset traffic demand, if the traffic demand is less than or equal to the traffic capacity threshold, the preset base entrance and exit setting plan is feasible, and outputting the base entrance and exit setting plan; If the initial value is less than the minimum angle value or the traffic demand is greater than the capacity threshold, the preset base entrance and exit and connecting road speed limit schemes are optimized according to the preset optimization conditions to obtain an optimized base entrance and exit setting scheme, specifically: The parameters for optimizing the preset base entrance and exit and connecting road speed limit scheme include the preset base entrance and exit speed limit value and the connecting road speed limit value; Determine whether the speed limit value at the entrance and exit of the base is greater than a preset first threshold; If the speed limit value at the entrance and exit of the base is greater than a preset first threshold, the speed limit value at the entrance and exit of the base is lowered by a preset value, the speed limit value of the connecting road remains unchanged, and the optimization is confirmed to be completed, thereby obtaining an optimized speed limit solution; If the speed limit value of the base entrance and exit is less than or equal to a preset first threshold, determining whether the speed limit value of the connecting road is greater than a preset second threshold; If the speed limit of the connecting road is less than or equal to the second threshold, it is determined that the base does not meet the opening conditions; If the speed limit of the connecting road is greater than the second threshold, the speed limit of the connecting road is lowered by a preset number of steps, the speed limit of the base entrance and exit remains unchanged, and the preset number of times the speed limit of the connecting road is lowered is increased by one; If the preset number of gear changes under the connecting road speed limit is less than or equal to two, the optimization is confirmed to be complete, and the optimized speed limit plan is obtained; if the preset number of gear changes under the connecting road speed limit is greater than two, it is confirmed that the base does not meet the opening conditions; The optimization module is used to obtain the static traffic data of the optimized base entrance and exit setting plan and the dynamic traffic data of the base according to the preset optimization conditions; Calculate the minimum angle between the base entrance and exit and the road and the traffic capacity value based on the static traffic data of the optimized base entrance and exit setting plan, the dynamic traffic data of the base, the preset first formula, and the preset second formula group, and evaluate the feasibility of the optimized base entrance and exit setting plan; If the optimized base entrance and exit setting plan does not meet the preset optimization conditions, it is determined that the base does not have the opening conditions.

6. The optimization device for base entrance and exit settings according to claim 5, characterized in that: The acquisition of the static traffic data and the dynamic traffic data of the base is specifically as follows: The static traffic data of the base includes the number of lanes in the exit direction of the entrance and exit, the width of a single lane in the exit direction of the entrance and exit, the number of lanes in the left-hand direction of the connecting road, the width of the outermost lane in the left-hand direction of the connecting road, the total width of the exit lane and median strip in the right-hand direction of the connecting road, the width of the innermost lane in the right-hand direction of the entrance of the connecting road, and the initial design value of the intersection angle between the entrance and exit and the road; The dynamic traffic data of the base includes the traffic flow and speed limit of the base entrance and exit, and the traffic flow and speed value of the connecting roads of the base.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for optimizing the base entrance and exit settings according to any one of claims 1 to 4.

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