A highway main line dynamic passenger and freight vehicle separation control method based on real-time traffic flow detection

Abstract

The application discloses a kind of based on real-time traffic flow detection's expressway main line dynamic passenger and freight vehicle separation control method.The application obtains dynamic passenger and freight vehicle separation strategy starting condition, so that dynamic passenger and freight vehicle separation control strategy is started, not only consider traffic load and running speed, but also consider the necessity of the influence of sudden event and lane implementation, so that the start of dynamic passenger and freight vehicle separation control strategy has scientificity and pertinence;By constructing dynamic passenger and freight vehicle separation control strategy maintenance condition and dynamic passenger and freight vehicle separation control strategy closing condition, a complete closed-loop control mechanism is formed, which can effectively avoid the frequent start-stop of dynamic passenger and freight vehicle separation control strategy near the critical state, adapt to the inherent randomness and volatility of real expressway traffic flow, greatly improve the robustness and applicability, realize the dynamic and fine control of passenger and freight vehicle driving lane, reduce the mixed conflict, and improve the traffic efficiency and safety level of expressway.

Description

Technical Field

[0001] This invention relates to the field of intelligent traffic control technology, specifically to a method for dynamic passenger and freight vehicle separation control on the main line of a highway based on real-time traffic flow detection. Background Technology

[0002] With the rapid development of my country's expressway network and the continuous growth of passenger and freight volume, mixed traffic of passenger and freight vehicles has become an important issue affecting the efficiency and safety of expressway traffic. As we all know, there are significant differences between trucks and buses in terms of power performance, driving speed, and braking distance. Trucks usually drive at slower speeds and have poor acceleration and braking performance, while buses drive at faster speeds and change lanes frequently. This difference leads to increased dispersion of traffic flow speed under mixed traffic conditions, intensified interference between vehicles, and easy formation of traffic bottlenecks, causing traffic congestion and traffic accidents.

[0003] Currently, the management of passenger and freight vehicles on highways mostly adopts static management methods such as fixed lane driving or time-limited driving restrictions. Among them, the fixed lane driving method cannot adapt to the real-time changes in traffic flow and will cause a waste of road resources when the traffic volume is low; while the time-limited driving restriction static management is difficult to cope with the impact of emergencies and cannot optimize lane resource allocation based on real-time traffic conditions. In order to overcome the above problems, dynamic management methods have been gradually applied with the increasing demand.

[0004] However, most existing dynamic management methods for passenger and freight vehicles on the main line of highways focus on the regulation of overall traffic flow and fail to fully consider the impact of the differences in characteristics between passenger and freight vehicles on traffic flow. The accuracy of passenger and freight vehicle separation control is low, the allocation method is inflexible and not targeted, resulting in an imbalance in the allocation of passenger and freight vehicles on highways and a significant reduction in the efficiency of road sections.

[0005] Therefore, it is necessary to invent a dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection, so as to solve the above-mentioned shortcomings in the technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for dynamic passenger and freight vehicle separation control on the mainline of a highway based on real-time traffic flow detection, comprising the following steps:

[0008] Step 1: Obtain real-time traffic flow data and event status data for the target road segment to obtain the traffic load rate;

[0009] Step 2: Establish the operation status detection conditions, event detection conditions, and lane separation implementation conditions for the target road segment, and derive the activation conditions for the dynamic passenger and freight vehicle separation strategy based on these conditions.

[0010] Step 3: When the conditions for activating the dynamic passenger and freight vehicle separation strategy are met, calculate the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes based on passenger vehicle traffic demand and freight vehicle traffic demand.

[0011] Step 4: Generate a dynamic passenger and freight vehicle separation control strategy based on the number of dedicated passenger vehicle lanes and the number of dedicated freight vehicle lanes, and publish the corresponding strategy content;

[0012] Step 5: During the implementation of the dynamic passenger and freight vehicle separation control strategy, construct the operating status maintenance conditions and minimum maintenance duration of the target road segment, and derive the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy.

[0013] Step 6: Determine the timing for closing the dynamic passenger and freight vehicle separation control strategy based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. Once triggered, execute the closure, cancel the corresponding strategy content, and restore mixed traffic.

[0014] The aforementioned method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection, in step 1, acquires real-time traffic flow data and event status data of the target road segment to obtain the traffic load rate. The specific steps are as follows:

[0015] 1.1 Obtain real-time traffic flow data for the target road segment using gantry detection equipment;

[0016] The real-time traffic flow data includes 15-minute gantry bus traffic volume. 15-minute gantry truck traffic Single-lane baseline traffic capacity Total number of lanes in the target road section Average speed of the gantry section ;

[0017] 1.2. Obtain event status data for the target road segment through the AI ​​Squared Event Monitoring System;

[0018] Among them, event status data includes traffic accident status, vehicle malfunction status, and severe weather status;

[0019] 1.3 Calculate the equivalent total traffic volume of the target road segment. The specific formula is as follows:

[0020] ;

[0021] in, This refers to the discount factor for freight cars;

[0022] 1.4 Based on converted total traffic volume Calculate the traffic load rate of the target road segment. The specific formula is as follows:

[0023] ;

[0024] in, The target road segment's overall baseline traffic capacity.

[0025] The aforementioned dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection establishes the operating status detection conditions, event detection conditions, and lane separation implementation conditions for the target road segment in step 2, and derives the activation conditions for the dynamic passenger and freight vehicle separation strategy based on these conditions. The specific steps are as follows:

[0026] 2.1 Based on flow load rate The operational status detection conditions for the target road segment are constructed using the following formula:

[0027] ;

[0028] in, This is a Boolean value for the running status detection condition. A Boolean function for detecting subconditions. The flow load rate threshold, For speed threshold, The logical operator for AND;

[0029] 2.2 Define the trigger formula for the event detection condition. The specific formula is as follows:

[0030] ;

[0031] in, For the event detection condition, a Boolean value; For traffic accident status measurements; For vehicle fault status quantities; For severe weather conditions; The OR logical operation;

[0032] 2.3. When no event state is detected, construct the lane separation implementation conditions for the dynamic passenger and freight vehicle separation strategy, and the specific formula is as follows:

[0033] ;

[0034] in, This is a Boolean value representing the conditions for implementing lane separation. The theoretical required number of lanes for the target road segment, calculated based on current traffic demand.

[0035] 2.4. Based on the operational status detection conditions, event detection conditions, and lane separation implementation conditions, establish the activation conditions for the dynamic passenger and freight vehicle separation strategy. The specific formula is as follows:

[0036] ;

[0037] in, The NOT logical operator; Let be the Boolean value for the activation condition of the dynamic passenger / freight vehicle separation strategy, and when When the target road segment simultaneously meets the operational status detection condition, the no-trigger event detection condition, and the lane separation implementation condition, the system determines that the dynamic passenger and freight vehicle separation strategy activation condition is met and initiates the dynamic passenger and freight vehicle separation control strategy. If the target road segment fails to meet at least one of the following conditions: operation status detection condition, no event trigger detection condition, or lane separation implementation condition, the system's dynamic passenger and freight vehicle separation strategy activation condition is not met, the dynamic passenger and freight vehicle separation control strategy is not activated, and the target road segment maintains its current mixed traffic operation state.

[0038] The aforementioned dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection, in step 3, calculates the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes based on passenger vehicle traffic demand and freight vehicle traffic demand when the activation conditions of the dynamic passenger and freight vehicle separation strategy are met. The specific steps are as follows:

[0039] 3.1 Calculate the passenger vehicle lane demand coefficient and truck lane demand coefficient The specific formula is as follows:

[0040] ;

[0041] ;

[0042] in, Adjustment factor for passenger vehicle demand. Adjustment factor for truck demand;

[0043] 3.2 Based on passenger vehicle lane demand coefficient and truck lane demand coefficient Calculate the number of dedicated lanes for passenger vehicles. Number of dedicated lanes for trucks The specific formula is as follows:

[0044] ;

[0045] ;

[0046] in, It is the floor function, and , .

[0047] The aforementioned dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection, in step 4, is based on the number of dedicated passenger vehicle lanes. Number of dedicated lanes for trucks Generate a dynamic passenger / freight vehicle separation control strategy and publish the corresponding strategy content. The specific steps are as follows:

[0048] 4.1 Constructing the passenger-freight separation boundary location based on the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes. Specifically:

[0049] ;

[0050] Among them, the left side is continuous This lane is designated as a dedicated lane for passenger vehicles, with continuous lanes on the right. This lane is designated as a dedicated lane for trucks;

[0051] 4.2 Calculation Strategy Release Intensity To determine the appropriate release level for the content, the specific formula is as follows:

[0052] ;

[0053] in, for Weighting coefficients For truck proportion item Weighting coefficients For the term of speed decrease Weighting coefficients;

[0054] 4.3 In terms of strategy release intensity Based on this, the length of the transition zone for implementing the passenger-freight separation control strategy is derived. The specific formula is as follows:

[0055] ;

[0056] in, Based on the transition length, Strategy release intensity Correction factor, for Correction factor;

[0057] 4.4. Based on the location of the passenger / freight separation boundary Strategy release intensity and transition zone length Generate dynamic passenger and freight vehicle separation control strategies;

[0058] Once the dynamic passenger and freight vehicle separation control strategy is generated, the corresponding strategy content is published through information boards, audio-visual equipment, or navigation systems. The corresponding strategy content includes: "Freight vehicles keep to the right, passenger and freight vehicles are separated, pay attention to safety."

[0059] The aforementioned dynamic passenger and freight vehicle separation control method for highway mainline based on real-time traffic flow detection, in step 5, during the implementation of the dynamic passenger and freight vehicle separation control strategy, constructs the operating state maintenance conditions and minimum maintenance duration of the target road segment, and derives the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. The specific steps are as follows:

[0060] 5.1 Calculate the operating status maintenance conditions of the target road segment, using the following formula:

[0061] ;

[0062] in, Boolean value for the condition to maintain the running state. To maintain the load factor threshold for the strategy, Maintain a speed threshold for the strategy;

[0063] 5.2 Calculate the minimum maintenance duration using the following formula:

[0064] ;

[0065] in, To minimize the duration of maintenance, Based on the duration of maintenance, for Correction factor for Correction factor;

[0066] in, Indicates when Time to take Otherwise, take 0;

[0067] 5.3 Based on the operating status maintenance conditions, event status data, and minimum maintenance duration of the target road segment, the maintenance conditions for the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows:

[0068] ;

[0069] in, A Boolean value representing the maintenance condition for the dynamic passenger / freight vehicle separation control strategy. Boolean value for the condition that maintains the running state; This represents the duration the strategy has been executed.

[0070] The aforementioned method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection, in step 6, determines the timing for closing the dynamic passenger and freight vehicle separation control strategy based on event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. Upon triggering, the strategy is closed, the corresponding strategy content is revoked, and mixed traffic is restored. The specific steps are as follows:

[0071] 6.1 Based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy, the closing conditions of the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows:

[0072] ;

[0073] in, This is a Boolean value representing the closing condition of the dynamic passenger / freight vehicle separation control strategy. To disable the load factor threshold, To disable the speed threshold;

[0074] 6.2, under the condition of satisfying When the closing conditions are met, the dynamic passenger and freight vehicle separation control strategy is turned off, and the corresponding strategy content of "freight vehicles keep to the right, passenger and freight vehicles are separated, pay attention to safety" is canceled, so that the target road section is restored to mixed traffic mode.

[0075] Compared with the prior art, the beneficial effects of the present invention are:

[0076] 1. This invention, through the collaborative acquisition of real-time traffic flow data and event status data of the target road segment, can identify the mixed passenger and freight traffic status of the target road segment in real time, thereby improving the timeliness and accuracy of the dynamic passenger and freight vehicle separation control strategy.

[0077] 2. This invention derives the activation conditions of the dynamic passenger and freight vehicle separation strategy by detecting the operating status, event, and lane separation conditions of the target road segment. This ensures that the activation of the dynamic passenger and freight vehicle separation control strategy considers not only traffic load and operating speed, but also the impact of sudden events and the necessity of lane separation, making the activation of the dynamic passenger and freight vehicle separation control strategy scientific and targeted.

[0078] 3. This invention introduces passenger vehicle lane demand coefficients and freight vehicle lane demand coefficients, and calculates the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes based on these coefficients. This allows the highway lane allocation results to better adapt to the differences in traffic demand between passenger vehicles and freight vehicles, avoids the waste or imbalance of lane resources caused by fixed lane separation methods, and significantly improves the utilization efficiency of highway mainline lane resources and the accuracy of passenger and freight separation control.

[0079] 4. By introducing strategy release intensity and transition zone length, this invention enables the dynamic passenger and freight vehicle separation control strategy to not only complete lane separation decisions, but also to realize the rational setting of multi-source information release and implementation sections, thereby improving driver recognition and execution rates.

[0080] 5. This invention forms a complete closed-loop control mechanism by constructing the maintenance conditions and closing conditions of the dynamic passenger and freight vehicle separation control strategy. This effectively avoids the frequent start and stop of the dynamic passenger and freight vehicle separation control strategy near the critical state, adapts to the inherent randomness and volatility of real highway traffic flow, and greatly improves robustness and applicability. It realizes dynamic and refined control of passenger and freight vehicle lanes, reduces mixed traffic conflicts, and improves the traffic efficiency and safety level of highways. Attached Figure Description

[0081] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0082] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0083] This invention provides the following: Figure 1 The method for dynamic passenger and freight vehicle separation control on the mainline of a highway based on real-time traffic flow detection, as shown, includes the following steps:

[0084] Step 1: Obtain real-time traffic flow data and event status data for the target road segment to obtain the traffic load rate. The specific steps are as follows:

[0085] 1.1 Obtain real-time traffic flow data for the target road segment using gantry detection equipment;

[0086] The real-time traffic flow data includes 15-minute gantry bus traffic volume. 15-minute gantry truck traffic Single-lane baseline traffic capacity Total number of lanes in the target road section Average speed of the gantry section ;

[0087] 1.2. Obtain event status data for the target road segment through the AI ​​Squared Event Monitoring System;

[0088] Among them, event status data includes traffic accident status, vehicle malfunction status, and severe weather status;

[0089] 1.3 Calculate the equivalent total traffic volume of the target road segment. The specific formula is as follows:

[0090] ;

[0091] in, This refers to the discount factor for freight cars;

[0092] 1.4 Based on converted total traffic volume Calculate the traffic load rate of the target road segment. The specific formula is as follows:

[0093] ;

[0094] in, The overall baseline traffic capacity of the target road segment;

[0095] In step 1, by simultaneously acquiring the gantry passenger vehicle flow, gantry freight vehicle flow, average speed of the gantry section, and event status of the target road segment, and combining multiple data for judgment, as well as calculating the flow load rate of the target road segment, the load intensity and remaining capacity of the target road segment are comprehensively reflected. This provides a data foundation for the subsequent dynamic passenger and freight vehicle separation control strategy activation judgment and lane calculation, making the subsequent strategy activation condition judgment results more accurate.

[0096] Step 2: Establish the operational status detection conditions, event detection conditions, and lane separation implementation conditions for the target road segment, and derive the activation conditions for the dynamic passenger and freight vehicle separation strategy based on these conditions. The specific steps are as follows:

[0097] 2.1 Based on flow load rate The operational status detection conditions for the target road segment are constructed using the following formula:

[0098] ;

[0099] in, This is a Boolean value for the running status detection condition. A Boolean function for detecting subconditions. The flow load rate threshold, For speed threshold, The logical operator for AND;

[0100] 2.2 Define the trigger formula for the event detection condition. The specific formula is as follows:

[0101] ;

[0102] in, This is a Boolean value representing the event detection condition. For traffic accident status measurements; For vehicle fault status quantities; For severe weather conditions; The OR logical operation;

[0103] 2.3. When no event state is detected, construct the lane separation implementation conditions for the dynamic passenger and freight vehicle separation strategy, and the specific formula is as follows:

[0104] ;

[0105] in, This is a Boolean value representing the conditions for implementing lane separation. The theoretical required number of lanes for the target road segment, calculated based on current traffic demand.

[0106] 2.4. Based on the operational status detection conditions, event detection conditions, and lane separation implementation conditions, establish the activation conditions for the dynamic passenger and freight vehicle separation strategy. The specific formula is as follows:

[0107] ;

[0108] in, The NOT logical operator; Let be the Boolean value for the activation condition of the dynamic passenger / freight vehicle separation strategy, and when When the target road segment simultaneously meets the operational status detection condition, the no-trigger event detection condition, and the lane separation implementation condition, the system determines that the dynamic passenger and freight vehicle separation strategy activation condition is met and initiates the dynamic passenger and freight vehicle separation control strategy. When the target road segment fails to meet at least one of the following conditions: operation status detection condition, no event trigger detection condition, and lane separation implementation condition, the system's dynamic passenger and freight vehicle separation strategy activation condition is not met, the dynamic passenger and freight vehicle separation control strategy is not activated, and the target road segment maintains its current mixed traffic operation state.

[0109] In step 2, by establishing dynamic passenger and freight vehicle separation strategy activation conditions, the activation conditions can automatically complete state identification and strategy triggering based on real-time traffic flow data, without manual intervention or on-site monitoring, realizing full-process automation of lane separation control. Thus, when the target road segment is under high load, low speed and suitable for lane separation implementation, it automatically identifies whether the dynamic passenger and freight vehicle separation control strategy should be activated, avoiding the problems of frequent activation and ineffective control of lane separation strategy caused by misjudgment of a single indicator in traditional solutions, greatly improving the accuracy and rationality of lane separation control, and enhancing the intelligence level and response efficiency of highway traffic control.

[0110] Step 3: When the activation conditions for the dynamic passenger and freight vehicle separation strategy are met, calculate the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes based on passenger vehicle traffic demand and freight vehicle traffic demand. The specific steps are as follows:

[0111] 3.1 Calculate the passenger vehicle lane demand coefficient and truck lane demand coefficient The specific formula is as follows:

[0112] ;

[0113] ;

[0114] in, Adjustment factor for passenger vehicle demand. Adjustment factor for truck demand;

[0115] 3.2 Based on passenger vehicle lane demand coefficient and truck lane demand coefficient Calculate the number of dedicated passenger vehicle lanes Number of dedicated lanes for trucks The specific formula is as follows:

[0116] ;

[0117] ;

[0118] in, It is the floor function, and , ;

[0119] In step 3, the passenger vehicle lane demand coefficient is calculated. and truck lane demand coefficient Based on the dynamic allocation of passenger vehicle lanes and freight vehicle lanes according to their ratio, a precise match between lane resources and real-time passenger and freight traffic demand structure is achieved. This is further enhanced by the use of the floor function and the application of... and The scope is limited to ensure that there is at least one dedicated lane for both passenger and freight vehicles, avoiding extreme situations where no lane is available for a certain type of vehicle. This enables dynamic and refined calculation of the number of lanes, which can be adjusted in real time according to changes in passenger and freight flow structure, operating speed and load rate, significantly improving the utilization efficiency of highway mainline lane resources and the accuracy of passenger and freight separation control.

[0120] Among them, the demand coefficient for passenger vehicle lanes Taking into account the basic traffic demand of passenger vehicles, a speed reduction term and a passenger vehicle demand correction coefficient are introduced. Therefore, when the average speed of the interval is lower than the speed threshold, the speed reduction term increases. The corresponding increase allows for the allocation of more lanes to passenger vehicles, thereby alleviating the problem of reduced passenger vehicle traffic efficiency caused by slower speeds and overcoming the shortcomings of the traditional fixed lane system in adapting to speed fluctuations.

[0121] Passenger vehicle lane demand coefficient Based on the basic demand of trucks, a traffic load rate exceeding the threshold and a truck demand correction coefficient are introduced. Therefore, when the traffic load rate of the target road segment exceeds the threshold, it increases accordingly, allocating more lanes to trucks and avoiding trucks frequently changing lanes or occupying passenger car lanes at low speeds due to insufficient lanes under high load conditions, thereby reducing passenger and freight interference and enhancing the adaptability of the strategy during peak hours.

[0122] Step 4: Based on the number of dedicated passenger vehicle lanes Number of dedicated lanes for trucks Generate a dynamic passenger / freight vehicle separation control strategy and publish the corresponding strategy content. The specific steps are as follows:

[0123] 4.1 Constructing the passenger-freight separation boundary location based on the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes. Specifically:

[0124] ;

[0125] Among them, the left side is continuous This lane is designated as a dedicated lane for passenger vehicles, with continuous lanes on the right. This lane is designated as a dedicated lane for trucks;

[0126] 4.2 Calculation Strategy Release Intensity To determine the appropriate release level for the content, the specific formula is as follows:

[0127] ;

[0128] in, for Weighting coefficients For truck proportion item Weighting coefficients For the term of speed decrease Weighting coefficients;

[0129] 4.3 In terms of strategy release intensity Based on this, the length of the transition zone for implementing the passenger-freight separation control strategy is derived. The specific formula is as follows:

[0130] ;

[0131] in, Based on the transition length, Strategy release intensity Correction factor, for Correction factor;

[0132] In step 4.3, the length of the transition zone can improve the smoothness of lane changing during the implementation of the dynamic passenger and freight vehicle separation control strategy;

[0133] 4.4. Based on the location of the passenger / freight separation boundary Strategy release intensity and transition zone length Generate dynamic passenger and freight vehicle separation control strategies;

[0134] Once the dynamic passenger and freight vehicle separation control strategy is generated, the corresponding strategy content is published through information boards, audio-visual equipment, or navigation systems. The corresponding strategy content includes: "Freight vehicles keep to the right, passenger and freight vehicles are separated, pay attention to safety."

[0135] In step 4, the passenger-cargo separation boundary position is constructed. Strategy release intensity and the length of the transition zone This achieves a complete engineering expression of the dynamic passenger and freight vehicle separation control strategy, from lane allocation to information dissemination and implementation sections, and clearly defines the continuous left-side lanes. This lane is a dedicated passenger vehicle lane, with continuous lanes on the right. The lane is a dedicated lane for trucks, which makes the lane boundary setting intuitive and easy for drivers to identify, avoiding the execution difficulties caused by complex lane allocation rules and improving the operability and compliance of the strategy.

[0136] Step 5: During the implementation of the dynamic passenger and freight vehicle separation control strategy, construct the operating status maintenance conditions and minimum maintenance duration for the target road segment, and derive the maintenance conditions for the dynamic passenger and freight vehicle separation control strategy. The specific steps are as follows:

[0137] 5.1 Calculate the operating status maintenance conditions of the target road segment, using the following formula:

[0138] ;

[0139] in, Boolean value for the condition to maintain the running state. To maintain the load factor threshold for the strategy, Maintain a speed threshold for the strategy;

[0140] 5.2 Calculate the minimum maintenance duration using the following formula:

[0141] ;

[0142] in, To minimize the duration of maintenance, Based on the duration of maintenance, for Correction factor for Correction factor;

[0143] in, Indicates when Time to take Otherwise, take 0;

[0144] In step 5.2, the minimum maintenance duration can prevent the dynamic passenger and freight vehicle separation control strategy from switching frequently near the critical state;

[0145] 5.3 Based on the operating status maintenance conditions, event status data, and minimum maintenance duration of the target road segment, the maintenance conditions for the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows:

[0146] ;

[0147] in, A Boolean value representing the maintenance condition for the dynamic passenger / freight vehicle separation control strategy. Boolean value for the condition that maintains the running state; This represents the duration the strategy has been executed.

[0148] In step 5, by constructing the operating status maintenance conditions, minimum maintenance duration, and dynamic passenger and freight vehicle separation control strategy maintenance conditions for the target road segment, an engineering maintenance mechanism is formed to prevent frequent start-stop of the dynamic passenger and freight vehicle separation control strategy and ensure control stability. This avoids frequent start-stop of the strategy due to short-term traffic fluctuations, enhances the robustness of the method, greatly improves its applicability, and enables it to adapt to the inherent randomness and volatility of real highway traffic flow.

[0149] Step 6: Determine the timing for closing the dynamic passenger and freight vehicle separation control strategy based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. Once triggered, execute the closure, cancel the corresponding strategy content, and restore mixed traffic. The specific steps are as follows:

[0150] 6.1 Based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy, the closing conditions of the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows:

[0151] ;

[0152] in, This is a Boolean value representing the closing condition of the dynamic passenger / freight vehicle separation control strategy. To disable the load factor threshold, To disable the speed threshold;

[0153] 6.2, under the condition of satisfying When the closing conditions are met, the dynamic passenger and freight vehicle separation control strategy is turned off, and the corresponding strategy content of "freight vehicles keep to the right, passenger and freight vehicles are separated, pay attention to safety" is canceled, so that the target road section is restored to mixed traffic mode.

[0154] In step 6, by constructing the closing conditions of the dynamic passenger and freight vehicle separation control strategy and forming a logical linkage with the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy, the smooth exit of the dynamic passenger and freight vehicle separation control strategy and the automatic recovery of the mainline mixed traffic mode are realized, completing the final link of the closed-loop control process, thereby significantly improving the intelligence level and engineering reliability of the dynamic passenger and freight vehicle separation control strategy.

[0155] Verification Experiment

[0156] To verify the implementation effect of the present invention, a three-lane one-way section of a highway mainline was selected as a demonstration test section. The section is 3.5km long, with a design speed of 120km / h and a detection cycle of 15min. During weekday peak hours, the section exhibits obvious mixed passenger and freight traffic characteristics, with the proportion of freight vehicles fluctuating between 22% and 30%. Furthermore, there are upstream ramp merging and localized following interference, which easily leads to phenomena such as freight vehicles traveling in tandem on the outer lane, frequent lane changes between inner and outer lanes, and a decrease in operating speed within the section. It has typical characteristics of mixed passenger and freight traffic on the mainline and is suitable as a verification object for the dynamic passenger and freight vehicle separation control strategy of the present invention.

[0157] Using the operational data of the same peak period for 10 consecutive working days as the sample basis, the traditional mixed traffic mode is used as the control group, and the operational results of the dynamic passenger and freight vehicle separation control strategy of this invention are used as the test group. The traffic efficiency, operational stability and traffic safety related indicators before and after the strategy are implemented are compared and analyzed to obtain the basic operational data of the test section, as shown in Table 1.

[0158] Table 1

[0159]

[0160] As shown in Table 1, the test section had a high traffic load rate during the testing period, the average speed of the section was significantly lower than the design operating level, and no abnormal events such as traffic accidents, vehicle malfunctions or severe weather occurred. Therefore, it meets the basic conditions for the start-up judgment of the dynamic passenger and freight vehicle separation control strategy of this invention.

[0161] Furthermore, based on the dynamic passenger and freight vehicle separation strategy activation conditions established by the present invention, the state of the test road section is determined. Since the target road section meets the requirements of high load operation, low speed operation, no abnormal events detected and lane separation implementation conditions within the detection period, the dynamic passenger and freight vehicle separation strategy activation conditions are determined to be met, and the dynamic calculation process of the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes is initiated.

[0162] At this point, the passenger vehicle lane demand coefficient is calculated separately. and truck lane demand coefficient And determine the number of dedicated passenger vehicle lanes. Number of dedicated lanes for trucks Finally, after comprehensively considering passenger vehicle traffic demand, freight vehicle traffic demand, section operating speed and flow load rate, the output dynamic passenger and freight vehicle separation strategy results are shown in Table 2.

[0163] Table 2

[0164]

[0165] After lane allocation is completed, the intensity of policy release and the length of transition zone are further calculated, and control information, namely the corresponding policy content, is released simultaneously through information boards, audio-visual equipment and navigation guidance terminals to guide passenger cars and freight cars to run in the corresponding dedicated lanes.

[0166] After the implementation of the dynamic passenger and freight vehicle separation control strategy, the operating status of the target road segment is continuously monitored, and the operating efficiency, traffic flow stability and lane-changing behavior characteristics before and after implementation are statistically analyzed. The operating effect of the traditional mixed traffic mode and the dynamic passenger and freight vehicle separation control strategy of this invention are compared. The results are shown in Table 3.

[0167] Table 3

[0168]

[0169] As shown in Table 3, without increasing the lane resources of road infrastructure, the average speed, traffic volume per unit time, and average travel time of the target road segment are all improved to varying degrees after adopting the dynamic passenger and freight vehicle separation control strategy of the present invention. At the same time, the number of lane changes for freight vehicles is significantly reduced, and the standard deviation of operating speed is significantly reduced. This indicates that the present invention can effectively reduce speed interference and lane change conflicts under mixed passenger and freight traffic conditions, and improve the balance and stability of the mainline traffic flow.

[0170] Further verification was conducted using the dynamic passenger and freight vehicle separation control strategy proposed in this invention, which maintains and shuts down under specific conditions. During the implementation period, when the target road segment remains under high load and low speed and no abnormal events occur, the dynamic passenger and freight vehicle separation control strategy can be continuously maintained, avoiding frequent starts and stops under short-term fluctuations. When the target road segment's operating status gradually recovers, or when an abnormal event occurs, the system can promptly trigger the shutdown condition and exit separation control, allowing the mainline to return to mixed traffic mode. This demonstrates that this invention not only possesses good strategy initiation capabilities but also strong operational maintenance and dynamic exit capabilities, forming a complete closed-loop control process.

[0171] In summary, this invention does not rely on static management based on fixed time periods, fixed lanes, or human experience. Instead, it incorporates passenger vehicle traffic, freight vehicle traffic, average speed of the section, single-lane baseline capacity, and event status data into a unified judgment framework. When the activation conditions are met, a dynamic passenger and freight vehicle separation control strategy is automatically implemented. When the operating status recovers or an abnormal event occurs, the dynamic passenger and freight vehicle separation control strategy is promptly exited, thereby ensuring that the control measures are always consistent with the real-time operating status of the target road segment.

[0172] This invention dynamically calculates the number of dedicated lanes for passenger vehicles and freight vehicles based on changes in passenger and freight traffic demand structure within different detection cycles. This effectively reduces speed interference and lane-changing conflicts between passenger and freight vehicles in the same lane system, reduces traffic flow dispersion caused by vehicle type differences, and improves the balance and stability of mainline traffic operation. Especially in peak hours, high-volume operation, and mainline sections with significant passenger and freight mixed traffic interference, the proposed dynamic passenger and freight vehicle separation control strategy can fully utilize the traffic potential of limited lane resources, making lane function allocation more aligned with actual traffic demand. This improves section operation efficiency, significantly reduces invalid lane-changing behavior, narrows the range of traffic flow speed fluctuations, improves operational order, enhances traffic flow stability, and to some extent reduces operational risks caused by passenger and freight mixed traffic.

[0173] Furthermore, this invention possesses strong real-time response capabilities, strategy adaptability, and engineering application value. It can solve the problems in existing technologies such as the reliance on static rules for passenger and freight separation control on highway mainlines, the lack of dynamic opening and closing linkage mechanisms, and insufficient precision in lane resource allocation. It can also provide feasible technical support for refined traffic organization, proactive operation management, and safe collaborative guidance on mainlines in smart highway scenarios, and has good prospects for promotion and application.

[0174] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used above are only some embodiments described in this invention. Obviously, those skilled in the art can obtain other drawings based on these drawings.

[0175] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection, characterized in that: Includes the following steps: Step 1: Obtain real-time traffic flow data and event status data for the target road segment to obtain the traffic load rate; Step 2: Establish the operation status detection conditions, event detection conditions, and lane separation implementation conditions for the target road segment, and derive the activation conditions for the dynamic passenger and freight vehicle separation strategy based on these conditions. Step 3: When the conditions for activating the dynamic passenger and freight vehicle separation strategy are met, calculate the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes based on passenger vehicle traffic demand and freight vehicle traffic demand. Step 4: Generate a dynamic passenger and freight vehicle separation control strategy based on the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes, and publish the corresponding strategy content. The specific steps are as follows: 4.1 Constructing the passenger-freight separation boundary location based on the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes. Specifically: ； Among them, the left side is continuous This lane is designated as a dedicated lane for passenger vehicles, with continuous lanes on the right. This lane is designated as a dedicated lane for trucks; 4.2 Calculation Strategy Release Intensity To determine the appropriate release level for the content, the specific formula is as follows: ； in, for Weighting coefficients For truck proportion item Weighting coefficients For the term of speed decrease Weighting coefficients; 4.3 In terms of strategy release intensity Based on this, the length of the transition zone for implementing the passenger-freight separation control strategy is derived. The specific formula is as follows: ； in, Based on the transition length, Strategy release intensity Correction factor, for Correction factor; 4.

4. Based on the location of the passenger / freight separation boundary Strategy release intensity and transition zone length Generate dynamic passenger and freight vehicle separation control strategies; Once the dynamic passenger and freight vehicle separation control strategy is generated, the corresponding strategy content is published through information boards, audio-visual equipment, or navigation systems. The corresponding strategy content includes: "Freight vehicles keep to the right, passenger and freight vehicles are separated, pay attention to safety." Step 5: During the implementation of the dynamic passenger and freight vehicle separation control strategy, construct the operating status maintenance conditions and minimum maintenance duration for the target road segment, and derive the maintenance conditions for the dynamic passenger and freight vehicle separation control strategy. The specific steps are as follows: 5.1 Calculate the operating status maintenance conditions of the target road segment, using the following formula: ； in, Boolean value for the condition to maintain the running state. To maintain the load factor threshold for the strategy, Maintain a speed threshold for the strategy; 5.2 Calculate the minimum maintenance duration using the following formula: ； in, To minimize the duration of maintenance, Based on the duration of maintenance, for Correction factor for Correction factor; in, Indicates when Time to take Otherwise, take 0; 5.3 Based on the operating status maintenance conditions, event status data, and minimum maintenance duration of the target road segment, the maintenance conditions for the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows: ； in, A Boolean value representing the maintenance condition for the dynamic passenger / freight vehicle separation control strategy. Boolean value for the condition that maintains the running state; This indicates the duration the strategy has been executed. Step 6: Determine the timing for closing the dynamic passenger and freight vehicle separation control strategy based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. Once triggered, execute the closure, cancel the corresponding strategy content, and restore mixed traffic.

2. The method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection according to claim 1, characterized in that: In step 1, real-time traffic flow data and event status data of the target road segment are acquired to obtain the traffic load rate. The specific steps are as follows: 1.1 Obtain real-time traffic flow data for the target road segment using gantry detection equipment; The real-time traffic flow data includes 15-minute gantry bus traffic volume. 15-minute gantry truck traffic Single-lane baseline traffic capacity Total number of lanes in the target road section Average speed of the gantry section ; 1.

2. Obtain event status data for the target road segment through the AI ​​Squared Event Monitoring System; Among them, event status data includes traffic accident status, vehicle malfunction status, and severe weather status; 1.3 Calculate the equivalent total traffic volume of the target road segment. The specific formula is as follows: ； in, This refers to the discount factor for freight cars; 1.4 Based on converted total traffic volume Calculate the traffic load rate of the target road segment. The specific formula is as follows: ； in, The target road segment's overall baseline traffic capacity.

3. The method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection according to claim 1, characterized in that: In step 2, the operational status detection conditions, event detection conditions, and lane separation implementation conditions for the target road segment are established, and the activation conditions for the dynamic passenger and freight vehicle separation strategy are derived accordingly. The specific steps are as follows: 2.1 Based on flow load rate The operational status detection conditions for the target road segment are constructed using the following formula: ； in, This is a Boolean value for the running status detection condition. A Boolean function for detecting subconditions. The flow load rate threshold, For speed threshold, The logical operator for AND; 2.2 Define the trigger formula for the event detection condition. The specific formula is as follows: ； in, This is a Boolean value representing the event detection condition. For traffic accident status measurements; For vehicle fault status quantities; For severe weather conditions; The OR logical operation; 2.

3. When no event state is detected, construct the lane separation implementation conditions for the dynamic passenger and freight vehicle separation strategy, and the specific formula is as follows: ； in, This is a Boolean value representing the conditions for implementing lane separation. The theoretical required number of lanes for the target road segment, calculated based on current traffic demand. 2.

4. Based on the operational status detection conditions, event detection conditions, and lane separation implementation conditions, establish the activation conditions for the dynamic passenger and freight vehicle separation strategy. The specific formula is as follows: ； in, The NOT logical operator; Let be the Boolean value for the activation condition of the dynamic passenger / freight vehicle separation strategy, and when When the target road segment simultaneously meets the operational status detection condition, the no-trigger event detection condition, and the lane separation implementation condition, the system determines that the dynamic passenger and freight vehicle separation strategy activation condition is met and activates the dynamic passenger and freight vehicle separation control strategy. If the target road segment fails to meet at least one of the following conditions: operation status detection condition, no event trigger detection condition, or lane separation implementation condition, the system's dynamic passenger and freight vehicle separation strategy activation condition is not met, the dynamic passenger and freight vehicle separation control strategy is not activated, and the target road segment maintains its current mixed traffic operation state.

4. The method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection according to claim 1, characterized in that: In step 3, when the activation conditions for the dynamic passenger and freight vehicle separation strategy are met, the number of dedicated passenger vehicle lanes and dedicated freight vehicle lanes are calculated based on passenger vehicle traffic demand and freight vehicle traffic demand. The specific steps are as follows: 3.1 Calculate the passenger vehicle lane demand coefficient and truck lane demand coefficient The specific formula is as follows: ； ； in, Adjustment factor for passenger vehicle demand. Adjustment factor for truck demand; 3.2 Based on passenger vehicle lane demand coefficient and truck lane demand coefficient Calculate the number of dedicated lanes for passenger vehicles. Number of dedicated lanes for trucks The specific formula is as follows: ； ； in, It is the floor function, and , .

5. The method for dynamic passenger and freight vehicle separation control on highway mainline based on real-time traffic flow detection according to claim 1, characterized in that: In step 6, the timing for closing the dynamic passenger and freight vehicle separation control strategy is determined based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy. Once triggered, the strategy is closed, the corresponding strategy content is revoked, and mixed traffic is restored. The specific steps are as follows: 6.1 Based on the event detection conditions and the maintenance conditions of the dynamic passenger and freight vehicle separation control strategy, the closing conditions of the dynamic passenger and freight vehicle separation control strategy are derived, and the specific formula is as follows: ； in, This is a Boolean value representing the closing condition of the dynamic passenger / freight vehicle separation control strategy. To disable the load factor threshold, To disable the speed threshold; 6.2, under the condition of satisfying When the closing conditions are met, the dynamic passenger and freight vehicle separation control strategy is turned off, and the corresponding strategy content of "freight vehicles keep right, passenger and freight vehicles are separated, pay attention to safety" is canceled, so that the target road section is restored to mixed traffic mode.

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