An intelligent generation algorithm and system for intersection traffic organization and traffic signs and markings

Abstract

This invention discloses an intelligent generation algorithm and system for intersection traffic organization and traffic signs and markings, belonging to the field of intelligent transportation technology. The intelligent generation algorithm for intersection traffic organization and traffic signs and markings includes parameter input, logical algorithm, result output, iterative calculation, and scheme verification. It can assist users in realizing the intelligent generation of intersection traffic organization and traffic signs and marking schemes, getting rid of the dependence on the designer's personal experience in traditional traffic design schemes, greatly eliminating personal subjectivity, and ensuring the compliance of traffic design schemes. Furthermore, based on the intelligent generation algorithm for intersection traffic organization and traffic signs and markings, an intelligent generation system for intersection traffic organization and traffic signs and markings is proposed, which to a certain extent solves the problems of current traffic scheme design being cumbersome and complex, having high entry barriers, and being unable to guarantee scheme compliance. It has broad application prospects in optimizing the design of existing intersection traffic schemes and verifying and reviewing traffic design scheme drawings.

Description

Technical fields:

[0001] This invention relates to the field of intelligent transportation technology, and in particular to an intelligent generation algorithm and system for intersection traffic organization and traffic signs and markings. Background technology:

[0002] Traffic organization refers to a technical solution that arranges traffic flows with different characteristics to different spatial locations accordingly. Traffic signs are discontinuous traffic facilities that use graphic symbols, colors, and text to convey specific information to traffic participants for traffic management and safety. Traffic markings are continuous traffic signs on the road surface that use lines, arrows, text, vertical markings, raised pavement markers, and delineators to convey guidance, restrictions, and warnings to traffic participants. The combined application of traffic signs and markings can explain and illustrate traffic organization design schemes, guiding traffic participants to follow the traffic rules and regulations at their current location. A reasonable traffic design scheme (including traffic organization design, traffic sign design, and traffic marking design) can not only guide traffic participants to proceed in an orderly manner and improve traffic efficiency, but also largely eliminate road traffic conflict points caused by the simultaneous travel of multiple traffic participants, avoiding traffic accidents caused by chaotic traffic order.

[0003] Currently, most traditional traffic design schemes are created by professional traffic engineers using mainstream computer-aided design software such as AutoCAD, 3DMax, and Midas, and corresponding construction drawings are then provided to construction companies for civil engineering construction. This process is tedious and complex, and it is difficult for personnel without relevant technical training to perform this work. In addition, traffic design schemes produced in this way are highly subjective, and compliance cannot be fully guaranteed. Some related patents have considered the complexity of using computer-aided design software such as AutoCAD, 3D Max, and Midas, proposing "a method, system, and storage medium for drawing intersection channelization and traffic flow diagrams (CN201811251576.X)". This method mainly involves manually setting the number and width of approach lanes, the number and width of exit lanes, and the form and width of the median strip, and then using a computer program to generate corresponding intersection channelization diagrams. However, this design scheme relies too heavily on personal experience and does not form a specific traffic sign and marking scheme. Another patent proposes "an automatic method, system, and storage medium for generating traffic organization at road intersections (CN201911357122.5)". This method identifies and extracts existing intersection channelization data and performs a secondary reproduction of the intersection channelization diagram based on the extracted data. It is an electronic drawing process for existing traffic organization schemes, but it cannot optimize existing traffic organization schemes or verify the compliance of design drawings.

[0004] Based on this, the technical solution of this application needs to provide an intelligent generation algorithm and system for intersection traffic organization and traffic signs and markings, to solve the problem that the design of traffic intersection channelization schemes relies too much on personal experience and cannot intelligently generate specific traffic sign and marking schemes. Summary of the Invention:

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an intelligent generation algorithm and system for intersection traffic organization and traffic signs and markings. This system includes parameter input, logical algorithms, result output, iterative calculation, and scheme verification and processing procedures. It assists users in intelligently generating intersection traffic design schemes, solving the problem of reliance on the designer's personal experience in traditional traffic design schemes. Based on the intelligent generation algorithm for intersection traffic organization and traffic signs and markings, an intelligent generation system for intersection traffic organization and traffic signs and markings is proposed. By constructing a standard library of road traffic signs and markings, standardized management of road traffic signs and markings is achieved, solving the problem that traditional intersection traffic design schemes cannot intelligently generate specific traffic sign and marking schemes.

[0006] The technical solution of the present invention is as follows:

[0007] An intelligent generation algorithm for intersection traffic organization and traffic signs and markings includes parameter input, logical algorithm, and result output; it generates an intersection traffic organization and traffic sign and marking configuration scheme through parameter input and logical algorithm, and outputs the relevant parameters of the generated intersection traffic organization and traffic sign and marking configuration scheme.

[0008] The parameter inputs include: intersection type, on / off direction, road grade, road right-of-way width, design speed, road segment type, and time-based and direction-based traffic flow data;

[0009] The logical algorithm includes four parts: angle matching, spatial allocation, traffic sign and marking matching, and intersection matching.

[0010] The angle matching is as follows: based on the type of intersection, the angles of each entrance and exit direction are assigned in a counterclockwise direction with the due east direction as 0 degrees.

[0011] The spatial allocation is as follows: For each direction, based on the knowledge graph of the intersection traffic organization design field, according to the road grade, road red line width, design speed, road segment form and time-sharing flow data, the type selection and spatial location allocation of each traffic component in that direction are carried out. The middle position of the road red line on both sides near the intersection end point is the coordinate origin, and the spatial position relationship of the aforementioned traffic components can be further calculated.

[0012] The traffic sign and marking matching: For each direction, based on the input design speed and the corresponding road design specifications, the traffic sign and marking schemes for the approach direction are configured;

[0013] The intersection matching process involves: after the angle matching, spatial allocation, and traffic sign and marking matching of each direction of the intersection are completed, the turning radius of the road red line is generated according to the road grade based on the road design specifications. Multiple traffic organization and traffic sign and marking schemes are then spliced ​​together to generate a unified intersection traffic organization and traffic sign and marking configuration scheme drawing. On this basis, a unified two-dimensional rectangular coordinate system is established with the midpoint of the road red line on both sides of a certain direction closest to the intersection side endpoint as the origin and the horizontal rightward direction as the positive x-axis, thus completing the spatial position configuration update of all elements of the intersection.

[0014] The output result is: the angle Φ between each direction of the intersection and the positive x-axis. i The selection of types and spatial relationships of traffic components in each direction at the intersection; the spatial layout and characteristic elements of traffic signs and markings in each direction at the intersection; the turning radius between road red lines in each direction at the intersection; and the spatial relationships of all elements at the intersection.

[0015] An intelligent algorithm for generating intersection traffic organization and traffic signs and markings also includes iterative calculation and scheme verification;

[0016] The iterative calculation: After the overall traffic design scheme of the intersection is output, the user can iteratively update one or more original parameter inputs according to the user's custom method to regenerate the intersection traffic organization and traffic sign and marking configuration scheme; in addition, the user can also iteratively update one or more result outputs according to the user's needs, and synchronously update and iterate the remaining result outputs.

[0017] Solution verification: For users who edit and modify some of the input parameters and output results according to their own methods, the algorithm needs to verify the input parameters, entrance and exit direction parameters, and overall intersection parameters.

[0018] Input parameter verification: Verify the road right-of-way width and design speed in the input parameters according to the specifications;

[0019] Verification of import and export direction parameters: Verify the selection of import and export traffic components and spatial location according to the specifications, and verify the import and export traffic sign and marking scheme.

[0020] Overall intersection parameter verification: In accordance with the specifications, the turning radius between the road red lines in each direction of the intersection is verified, as well as the matching relationship between the number of lanes at opposite entrances and exits is verified.

[0021] The logic algorithm generates recommended values ​​for road right-of-way width, design speed, and road segment form based on road grade. Users can use the recommended values ​​generated by the logic algorithm or optimize and adjust the recommended values ​​according to their personal needs.

[0022] The traffic signs include the following characteristic elements: sign type, sign name, sign outline shape, sign color, sign size, panel material, pattern content, pole type, and pole size; the traffic markings include the following characteristic elements: marking type, marking name, marking color, marking size, marking line type, marking ratio, marking material, and marking thickness.

[0023] The selection of the types and spatial allocation of the various traffic components include: the presence, form, and width of the entrance and exit motor vehicle and non-motor vehicle separation facilities; the form and width of the central isolation facility; the allocation of the width of the entrance and exit pedestrian walkways; the presence and width of the entrance and exit non-motor vehicle lanes; the corresponding parameters of the entrance lanes; the number and width of the exit lanes; the length of the entrance guide lanes, transition sections, and entrance road sections; and the length and width of the pedestrian crossings.

[0024] An intelligent system for generating traffic organization and traffic signs and markings at intersections includes the following steps:

[0025] (1) Construct a standard library for road traffic signs and markings;

[0026] (2) Design a system program based on the intelligent generation algorithm for traffic organization and traffic signs and markings at the intersection;

[0027] (3) Obtain the intersection type, direction of each entrance and exit, and road grade of the intersection that needs to be planned, and determine the road red line width, design speed, block form parameters and traffic flow data by time period and direction based on the road grade and design requirements.

[0028] (4) After inputting the parameters of step (3) into the system program, a unified intersection traffic organization and traffic sign and marking configuration scheme is generated, and the relevant parameters of the intersection traffic organization and traffic sign and marking configuration scheme are output. One or more of the parameters input and output of the intersection traffic organization and traffic sign and marking configuration scheme can be iteratively updated. After the parameter input is iteratively updated, the system program regenerates the intersection traffic organization and traffic sign and marking configuration scheme and performs scheme verification. The result output is iteratively updated, and the system program synchronously updates and iterates the output of the remaining other items and performs scheme verification.

[0029] The advantages of this invention are:

[0030] (1) The intelligent generation algorithm for intersection traffic organization and traffic signs and markings of the present invention includes parameter input, logic algorithm and result output processing flow, which helps users realize the intelligent generation of intersection traffic design schemes, get rid of the dependence of traditional traffic design schemes on the designer's personal experience, greatly eliminate personal subjectivity and ensure the compliance of traffic design schemes.

[0031] (2) The intelligent generation algorithm for intersection traffic organization and traffic signs and markings of the present invention adds iterative calculation and scheme verification in addition to parameter input, logical algorithm and result output processing flow. It supports users to customize the parameter input and structural output according to specific needs, improves the applicability of the algorithm. The algorithm will verify the new scheme formed after the parameter input and structural output are customized to ensure the compliance of the traffic design scheme.

[0032] (3) This invention realizes the standardized management of road traffic signs and markings by constructing a standard library of road traffic signs and markings. Through the intersection traffic organization and intelligent generation algorithm of traffic signs and markings, the corresponding traffic signs and markings at the intersection can be directly matched without relying on the designer.

[0033] (4) To a certain extent, this invention solves the problems of current traffic scheme design being cumbersome and complex, having high entry barriers, and being unable to guarantee the compliance of the scheme. It has broad application prospects in the optimization design of traffic schemes at existing intersections and the review and verification of traffic design scheme drawings. Attached image description:

[0034] Figure 1 This is a schematic diagram of parameter input for the present invention.

[0035] Figure 2 This is a schematic diagram of angle matching in the logical algorithm of this invention.

[0036] Figure 3 This is a schematic diagram of space allocation in the logical algorithm of the present invention.

[0037] Figure 4 This is a schematic diagram of traffic sign and marking matching in the logical algorithm of this invention.

[0038] Figure 5 This is a schematic diagram of intersection matching in the logical algorithm of this invention.

[0039] Figure 6 This is a schematic diagram of the results output of the present invention.

[0040] Figure 7 This is a schematic diagram of the original input iterative update of the present invention.

[0041] Figure 8 This is a schematic diagram illustrating the iterative update of the output parameters of the present invention.

[0042] Figure 9 This is a schematic diagram illustrating the verification of the original input parameters of the present invention.

[0043] Figure 10 This is a schematic diagram for verifying the import / export direction parameters of the present invention.

[0044] Figure 11 This is a schematic diagram for verifying the overall parameters of the intersection according to the present invention.

[0045] Figure 12 This is a schematic diagram of the input interface for the single-direction original input parameters of the present invention.

[0046] Figure 13 This is a schematic diagram of the single-direction output parameter output interface of the present invention.

[0047] Figure 14 This is a schematic diagram of the output interface of the overall intersection design scheme of the present invention. Detailed implementation method:

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] The following is combined with Figures 1 to 3 The present invention will be described in further detail below.

[0050] like Figure 1 As shown, a standard library for road traffic signs and markings is constructed. Referring to the relevant provisions of the "Specifications for Setting Up Urban Road Traffic Signs and Markings" (GB51038-2015), a standard library of road traffic signs and markings was established. The characteristic elements of traffic signs include sign type (instructional signs, directional signs, warning signs, etc.), sign name, sign outline shape (circle, triangle, rectangle, etc.), sign color (background color, outline color, pattern color), sign size, panel material (aluminum alloy plate, diamond-grade reflective film, etc.), pattern content, pole type (vertical pole, horizontal pole, etc.), pole size, etc. (as shown in Table 1, which displays the traffic sign library data). The characteristic elements of traffic markings include marking type (instructional markings, prohibitory markings, warning markings), marking name, marking color, marking size, marking line shape, marking ratio (for solid and dashed lines), marking material (normal temperature paint adhesive, heated solvent-based paint, hot-melt reflective paint, etc.), marking thickness, etc. (as shown in Table 2, which displays the traffic marking library data).

[0051] Table 1: Traffic Sign Database

[0052]

[0053] Table 2: Traffic Markings Database

[0054]

[0055] like Figure 2 As shown, an intelligent auxiliary generation algorithm for intersection traffic organization and traffic signs and markings is proposed. Referring to the requirements of relevant standards such as the *Code for Design of Urban Road Engineering* (CJJ37-2012), *Code for Design of Urban Road Traffic Organization* (GB / T36670-2018), *Code for Design of Urban Road Intersections* (CJJ152-2010), and *Code for Planning of Urban Road Intersections* (GB50647-2011), an auxiliary generation algorithm for intersection traffic organization and traffic signs and markings is proposed. The algorithm includes parameter inputs (intersection type, entrance / exit numbers and directions, road grade, road right-of-way width, design speed, segment type, and traffic flow divided by time period and direction), logical algorithms (angle matching, spatial allocation, traffic sign and marking matching, intersection matching), and result outputs (angles Φ of each entrance / exit direction at the intersection). i The system consists of five processing steps: the form and spatial layout of each element in each direction of the intersection, the matching scheme of traffic signs and markings in each direction of the intersection, the intersection matching scheme, iterative calculation (the input parameters and some values ​​of the output results can be adjusted according to individual needs to realize the iterative calculation of the algorithm), and scheme verification (further judging the rationality of the scheme generated by the system by referring to the requirements of the specification documents).

[0056] like Figure 1 The diagram shows the parameter input parameters, which include intersection type (T-shaped, Y-shaped, cross-shaped, five-way intersection, etc.), entrance / exit numbers and directions (e.g., for a cross-shaped intersection, numbers 1, 2, 3, and 4 can correspond to "East," "South," "West," and "North," respectively), road class (arterial road, secondary arterial road, local road), road right-of-way width, design speed, road slab configuration (one slab, two slabs, three slabs, four slabs), and time-based traffic flow data. The intersection type guides the generation of entrance / exit numbers; for example, selecting "cross-shaped" will generate four entrance / exit numbers (1, 2, 3, and 4) by default. The road class guides the input of road right-of-way width, design speed, and road slab configuration; for example, selecting "arterial road" will generate a road right-of-way width of 50 meters, a design speed of 36 km / h, and a four-slab road configuration by default.

[0057] like Figures 2 to 5 The diagram shows the logical algorithm, which includes four parts: angle matching, spatial allocation, traffic sign and marking matching, and intersection matching.

[0058] like Figure 2 The diagram illustrates the logical algorithm (angle matching). After selecting the intersection type, the angles for each direction are assigned in a counter-clockwise direction, with the east direction as 0 degrees (i.e., horizontal to the right). For example, if the selected intersection type is T-shaped, the angles for the three directions are 0 degrees, 180 degrees, and 270 degrees; if the selected intersection type is Y-shaped, the angles for the three directions are 0 degrees, 120 degrees, and 240 degrees; if the selected intersection type is cross-shaped, the angles for the four directions are 0 degrees, 90 degrees, 180 degrees, and 270 degrees; and if the selected intersection type is a five-way intersection, the angles for the five directions are 0 degrees, 72 degrees, 144 degrees, 216 degrees, and 288 degrees.

[0059] like Figure 3 The diagram shows a logical algorithm (spatial allocation). For a certain direction, after selecting the road grade and determining the road red line width, road segment type, design speed, and traffic flow data by time period and direction, the system comprehensively considers relevant regulations and makes selection of the type and spatial allocation of various traffic components in that direction, i.e., road cross-section design. Specifically: Road segmentation calculations are performed based on the determined segment types. For a single-segment road, the ratio of sidewalk:non-motorized vehicle lane:motorized vehicle lane = 1:0.5:15; for a two-segment road, the ratio is: sidewalk:non-motorized vehicle lane:motorized vehicle lane:median strip = 1:0.5:15:1; for a three-segment road, the ratio is: sidewalk:non-motorized vehicle lane:motorized vehicle lane:side median strip = 1:0.5:15:1; for a four-segment road, the ratio is: sidewalk:non-motorized vehicle lane:motorized vehicle lane:median strip:side median strip = 1:0.5:15:1:1. Sidewalks, non-motorized vehicle lanes, and side medians at entrances and exits are evenly distributed. The ratio of entrance motorized vehicle lane width to exit motorized vehicle lane width is 3:5. Lane functions are evenly distributed according to the flow rate proportions for each direction. The width of a single lane should not be less than 2.75 meters and should not exceed 3.75 meters. For urban arterial roads, when the design speed exceeds 40 km / h, the lane width is 3.75 meters; otherwise, it is 3.5 meters, and under extreme conditions, it should not be less than 2.8 meters. Set the origin of the coordinate system to the midpoint of the right-of-way lines on both sides of the road closest to the intersection (e.g., ...). Figure 13 As shown in the figure, the spatial relationships of the aforementioned traffic components can be further calculated.

[0060] like Figure 4The diagram shows a logical algorithm (traffic sign and marking matching). For a specific direction, based on the input design speed and relevant specifications, the algorithm configures the traffic sign and marking schemes for that approach direction. For example, at the entrance section of an intersection, lane direction indicators, pedestrian crossing indicators, and location guidance signs need to be set up. Different lanes at the entrance section are separated by dashed lines, and the dashed line ratio is 1:2 when the design speed is below 60km / h, and 2:3 otherwise.

[0061] like Figure 5 The diagram shows a logical algorithm (intersection matching). For the entire intersection, based on the input road grade parameters and regulatory requirements, it generates road red line corner radii (20-30 meters for main roads, 15-20 meters for secondary roads, and 10-20 meters for non-main / secondary roads). This is then used to stitch together traffic organization and traffic sign / marking schemes for multiple directions, generating a unified intersection traffic design plan drawing. Based on this, the origin of the coordinate system is set at the midpoint of the road red line corresponding to direction number 1 (e.g., ...). Figure 14 As shown in the figure, a unified two-dimensional rectangular coordinate system is established with the horizontal rightward x-axis as the positive axis, and the spatial position configuration update of all elements of the intersection is completed.

[0062] like Figure 6 The image shown is a schematic diagram of the output results. The output parameters include:

[0063] 1) The angles (counterclockwise angles) between each direction of the intersection and the positive x-axis. i ;

[0064] 2) The presence, type, and width of the separation facilities for motorized and non-motorized vehicles at the entrances and exits of the intersection in each direction; the type and width of the central median barrier; the width of the pedestrian walkways at the entrances and exits; the presence and width of the non-motorized vehicle lanes at the entrances and exits; the corresponding parameters of the entrance lanes (number, function, and width of entrance lanes; configuration of waiting areas; configuration of reversible lanes; configuration of tidal flow lanes); the number and width of the exit lanes; the length of the entrance guide lanes, transition sections, and entrance road sections; and the length and width of the pedestrian crossings. Also, the spatial relationships of the above information.

[0065] 3) Spatial layout and characteristic elements of traffic signs and markings in all directions at the intersection. The characteristic elements of traffic signs include sign type (instructional sign, directional sign, warning sign, etc.), sign name, sign outline shape (circle, triangle, rectangle, etc.), sign color (background color, outline color, pattern color), sign size, panel material (aluminum alloy plate, diamond-grade reflective film, etc.), pattern content, pole type (vertical pole, horizontal pole, etc.), pole size, etc. The characteristic elements of traffic markings include marking type (instructional marking, prohibitory marking, warning marking), marking name, marking color, marking size, marking line shape, marking ratio (for solid and dashed lines), marking material (normal temperature paint adhesive, heated solvent-based paint, hot melt reflective paint, etc.), marking thickness, etc.

[0066] 4) The turning radius between the road red lines in each direction at the intersection and the spatial positional relationship of all elements at the intersection.

[0067] like Figures 7 to 8 The diagram shows an iterative update process, which includes two parts: iterative update of the original input and iterative update of the output parameters.

[0068] like Figure 7 The diagram shows the original input iterative update. The algorithm supports editing and modifying one or more of the seven original input data items, including intersection type, entrance and exit numbers and directions, road grade, road red line width, design speed, block type, and time-segmented and traffic flow data, and recalculates and configures the intersection design scheme.

[0069] like Figure 8 The diagram illustrates the iterative update of output parameters. Based on user needs, one or more output feature parameters can be edited and modified, and the characteristics and spatial relationships of other feature parameters are iteratively generated. These feature parameters include angles Φ in various directions. i(Configure angles for each direction according to user needs); iterative updates of the spatial distribution of components in each direction, specifically including the presence, form, and width of entrance and exit motorized / non-motorized vehicle separation facilities; the form and width of central median barriers; the width of entrance and exit pedestrian walkways; the presence and width of entrance and exit non-motorized vehicle lanes; corresponding parameters of entrance lanes (number, function, and width of entrance lanes; configuration of waiting areas; configuration of reversible lanes; configuration of tidal flow lanes); the number and width of exit lanes; the length of entrance guide lanes, transition sections, and entrance road sections; the length and width of pedestrian crossings; and the spatial relationship of each element (width adjustments are made in the order of motorized vehicle lane width, non-motorized vehicle lane width, pedestrian walkway width, median strip width, and side strip width; for example, the space required to increase the width of motorized vehicle lanes is limited and is deducted from the width of the side strip); the width and length of pedestrian crossings, entrance guide lanes, transition sections, and entrance road sections are configured according to user needs; the configuration of traffic signs and markings in each direction (configure the presence and spatial location of traffic signs and markings according to user needs); and the turning radius between road red lines in each direction (configure the turning radius between road red lines in each direction according to user needs).

[0070] like Figures 9 to 11 The diagram shows the parameter verification process, which includes three parts: verification of original input parameters, verification of inbound and outbound direction parameters, and verification of overall intersection parameters.

[0071] like Figure 9 The diagram shows the verification of the original input parameters. According to the specifications, the road right-of-way width and design speed in the original input parameters are verified. Specifically: the road right-of-way width of arterial roads should be 36-50 meters, the road right-of-way width of secondary arterial roads should not exceed 30 meters, and the width of branch roads should be less than 24 meters. Furthermore, the "Code for Design of Urban Road Engineering" (CJJ37-2012) stipulates that the design speed of arterial roads should be 60, 50, and 40 km / h, the design speed of secondary arterial roads should be 50, 40, and 30 km / h, and the design speed of branch roads should be 40, 30, and 20 km / h. The design speed within at-grade intersections should be 0.5-0.7 times the road segment's speed. If the original input parameters violate the above principles, the system will issue a corresponding warning message.

[0072] like Figure 10 The diagram shows the verification of inlet and outlet parameters. The output parameters are verified according to the specifications. For example, the "Urban Road Intersection Planning Code" (GB50647-2011) requires that the width of newly built entrance lanes be ≥3 meters, the width of reconstructed entrance lanes be ≥2.8 meters, the width of newly built exit lanes be ≥3.5 meters, and the width of reconstructed exit lanes be ≥3.25 meters. Similarly, the "Urban Road Engineering Design Code" (CJJ37-2012) requires that the minimum width of the median strip at intersections be 2.0 meters, and the minimum width of the side medians be 2.0 meters. If the output inlet and outlet parameters violate the above principles, the system will issue corresponding warning messages.

[0073] like Figure 11 The diagram shows the overall parameter verification of the intersection. According to the specifications, the corner radii between the road red lines in each direction and the matching relationship of the number of entrance and exit lanes are verified. Specifically, the "Urban Road Intersection Planning Code" (GB50647-2011) requires that the maximum corner radius be 20 meters and the minimum be 5 meters when there are non-motorized vehicle lanes, and the maximum corner radius be 25 meters and the minimum be 10 meters when there are no non-motorized vehicle lanes. Furthermore, to ensure the matching of the number of entrance and exit lanes and avoid unnecessary conflict points, the number of entrance lanes should be less than or equal to the number of corresponding exit lanes. For example, the number of through lanes at the east entrance should be less than or equal to the number of lanes at the west exit. If the output overall intersection parameters violate the above principles, the system will issue a corresponding warning message.

[0074] like Figures 12 to 14 The diagram shows the software interface of the intelligent auxiliary generation system for intersection traffic organization and traffic signs and markings. It mainly includes three parts: the input interface for original input parameters in one direction, the output interface for output parameters in one direction, and the output interface for the overall intersection design scheme.

[0075] like Figure 12 The image shows a schematic diagram of the input interface for raw parameters in a single direction. Input parameters include intersection type, entrance / exit number and direction, road grade, design speed, road right-of-way width, road segment type, and time-of-day and direction-specific traffic flow data (optional). After completing the input parameters, clicking the "OK" option will generate an intersection channelization map, and clicking the "Output" option will output the spatial layout of each element in that direction, as well as details of traffic sign and marking configurations (e.g., ...). Figure 13 (As shown).

[0076] like Figure 13 The diagram shows the output interface for parameters in a single direction, comprising three parts: spatial layout, sign list, and marking list. The spatial layout includes the presence, form, and width of entrance / exit separation facilities for motorized and non-motorized vehicles; the form and width of central median barriers; the width of entrance / exit pedestrian walkways; the presence and width of entrance / exit non-motorized vehicle lanes; relevant parameters for entrance lanes (number, function, and width of entrance lanes; waiting area configuration; reversible lane configuration; tidal flow lane configuration); the number and width of exit lanes; the length of entrance guide lanes, transition sections, and entrance road sections; and the length and width of pedestrian crossings. The sign list includes information such as the sign type, sign name, sign outline shape, sign color, sign size, panel material, graphic content, pole type, pole size, and location of each traffic sign in that direction. The marking list includes information such as the marking type, marking name, marking color, marking size, marking shape, marking ratio (for solid and dashed lines), marking material, marking thickness, and marking location of each traffic marking in that direction.

[0077] like Figure 14 The diagram shown is a schematic of the overall design scheme output interface for the intersection, which includes three parts: the overall spatial layout of the intersection, traffic signs, and traffic markings. The spatial layout includes the turning radius between the road red lines in each direction of the intersection, the presence, form, and width of the separation facilities for motorized and non-motorized vehicles at each entrance and exit, the form and width of the central divider, the width of the pedestrian walkways at entrances and exits, the presence and width of the non-motorized vehicle lanes at entrances and exits, the corresponding parameters of the entrance lanes (number, function, and width of entrance lanes, configuration of waiting areas, configuration of reversible lanes, and configuration of tidal flow lanes), the number and width of the exit lanes, the length of the entrance guide lanes, transition sections, and entrance road sections, and the length and width of the pedestrian crossings, etc.; the traffic signs include a list of traffic signs in each direction of the intersection, i.e., the sign type, sign name, sign outline shape, sign color, sign size, panel material, graphic content, pole type, pole size, and location of each traffic sign in each direction of the intersection; the traffic markings include a list of traffic markings in each direction of the intersection, i.e., the marking type, marking name, marking color, marking size, marking line shape, marking ratio (for solid and dashed lines), marking material, marking thickness, and marking location of each traffic marking in each direction of the intersection.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intersection traffic organization and traffic sign marking intelligent generation algorithm, characterized in that, Includes parameter input, logical algorithm, and result output; The parameter inputs include: intersection type, on / off direction, road grade, road right-of-way width, design speed, road segment type, and time-of-day and time-of-traffic flow. The logical algorithm includes four parts: angle matching, spatial allocation, traffic sign and marking matching, and intersection matching. The angle matching is as follows: based on the type of intersection, the angles of each entrance and exit direction are assigned in a counterclockwise direction with the due east direction as 0 degrees. The spatial allocation is as follows: For each direction, based on the knowledge graph of the intersection traffic organization design field, according to the road grade, road red line width, design speed, road segment form and time-sharing flow data, the type selection and spatial location allocation of each traffic component in that direction are carried out. The middle position of the road red line on both sides near the intersection end point is the coordinate origin, and the spatial position relationship of the aforementioned traffic components can be further calculated. The traffic sign and marking matching: For each direction, based on the input design speed and the corresponding road design specifications, the traffic sign and marking schemes for the approach direction are configured; The intersection matching process involves: once the angle matching, spatial allocation, and traffic sign and marking matching for each direction of the intersection are completed, the turning radius of the road red line is generated according to the road grade based on the road design specifications. This is then used to splice together traffic organization and traffic sign and marking schemes for multiple directions, generating a unified intersection traffic organization and traffic sign and marking configuration scheme drawing. On this basis, a unified two-dimensional rectangular coordinate system is established with the midpoint of the road red lines on both sides of a certain direction closest to the intersection's side endpoint as the origin, and the horizontal rightward direction as the positive x-axis, thus completing the spatial position configuration update of all elements of the intersection. The result output: the angle Φ between each direction of the intersection and the positive x-axis direction i The type selection and spatial position relationship of each traffic component element of each direction of the intersection, the spatial position layout of the traffic sign and marking of each direction of the intersection and the characteristic elements, the corner radius between the red lines of each direction of the intersection and the spatial position relationship of all elements of the intersection. 2.The intersection traffic organization and traffic sign marking and marking intelligent generation algorithm according to claim 1, characterized in that, It also includes iterative calculations and scheme verification; The iterative calculation: After the overall traffic design scheme of the intersection is output, the user can iteratively update one or more original parameter inputs according to the user's custom method to regenerate the intersection traffic organization and traffic sign and marking configuration scheme; in addition, the user can also iteratively update one or more result outputs according to the user's needs, and synchronously update and iterate the remaining result outputs. The solution verification process is as follows: If the user edits and modifies some of the input parameters and output results according to the user's customization method, the algorithm needs to verify the input parameters, the entrance and exit direction parameters, and the overall parameters of the intersection.

3. The intelligent generation algorithm for intersection traffic organization and traffic signs and markings according to claim 2, characterized in that, Input parameter verification: Verify the road right-of-way width and design speed in the input parameters after iterative update according to the specifications; Verification of import / export direction parameters: Verify the type selection and spatial location allocation of each traffic component of import / export after the iterative update, and verify the import / export traffic sign and marking schemes in accordance with the specifications. Overall intersection parameter verification: Based on the specifications, the turning radius between the road red lines in each direction of the intersection after the iterative update is verified, as well as the matching relationship of the number of lanes at opposite entrances and exits is verified.

4. The intersection traffic organization and traffic sign marking and pavement marking intelligent generation algorithm according to claim 2, characterized in that, The logic algorithm generates recommended values ​​for road right-of-way width, design speed, and road segment form based on road grade. Users can use the recommended values ​​generated by the logic algorithm or optimize and adjust the recommended values ​​according to their personal needs.

5. The intersection traffic organization and traffic marking and signage intelligent generation algorithm according to any one of claims 1-4, characterized in that, The traffic signs include the following characteristic elements: sign type, sign name, sign outline shape, sign color, sign size, panel material, pattern content, pole type, and pole size; the traffic markings include the following characteristic elements: marking type, marking name, marking color, marking size, marking line type, marking ratio, marking material, and marking thickness.

6. The algorithm for intelligent generation of traffic organization and traffic marking at intersection according to any one of claims 1-4, characterized in that, The selection of the types and spatial allocation of the various traffic components include: the presence, form, and width of the entrance and exit motor vehicle and non-motor vehicle separation facilities; the form and width of the central isolation facility; the allocation of the width of the entrance and exit pedestrian walkways; the presence and width of the entrance and exit non-motor vehicle lanes; the corresponding parameters of the entrance lanes; the number and width of the exit lanes; the length of the entrance guide lanes, transition sections, and entrance road sections; and the length and width of the pedestrian crossings.

7. An intelligent intersection traffic organization and traffic sign and marking generation system, characterized in that: Includes the following steps: (1) Construct a standard library for road traffic signs and markings; (2) Design a system program based on the intelligent generation algorithm for intersection traffic organization and traffic signs and markings as described in any one of claims 1-4; (3) Obtain the intersection type, direction of each entrance and exit, and road grade of the intersection that needs to be planned, and determine the road red line width, design speed, block form parameters and traffic flow data by time period and direction based on the road grade and design requirements. (4) After inputting the parameters of step (3) into the system program, a unified intersection traffic organization and traffic sign and marking configuration scheme is generated, and the relevant parameters of the intersection traffic organization and traffic sign and marking configuration scheme are output. One or more of the parameters input and output of the intersection traffic organization and traffic sign and marking configuration scheme can be iteratively updated. After the parameter input is iteratively updated, the system program regenerates the intersection traffic organization and traffic sign and marking configuration scheme and performs scheme verification. The result output is iteratively updated, and the system program synchronously updates and iterates the output of the remaining other items and performs scheme verification.

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