Intersection traffic organization auxiliary design system and equipment based on digital case library

Abstract

The application provides an intersection traffic organization auxiliary design system and equipment based on a digital case library. The system comprises an intersection traffic organization status input and problem analysis module, a digital traffic organization case library construction and updating module, an intersection traffic organization scheme optimization design module, an intersection traffic organization scheme evaluation module and a man-machine interaction module. The application intelligently identifies intersection traffic organization status problems and causes from two dimensions of road environment and traffic operation characteristics, and can quickly and accurately generate a preliminary design scheme of the intersection traffic organization for reference by a designer in combination with existing intersection traffic organization design example information, so as to iteratively adjust the scheme and output an optimal scheme, and improve work efficiency and quality.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of traffic organization design technology, and in particular to an intersection traffic organization auxiliary design system and equipment based on a digital case library. Background Technology

[0002] Intersection traffic organization optimization design is a crucial task for achieving refined and scientific traffic management and control at intersections. Currently, optimizing intersection traffic organization schemes primarily relies on the professional knowledge and experience of traffic designers. Specific optimization measures for these schemes typically require designers to combine relevant design standards and their personal experience, placing high demands on users' professional knowledge and experience, resulting in a heavy workload and low efficiency. Furthermore, the evaluation of intersection traffic organization schemes is subject to subjective judgment. In recent years, with the development of computer information technology and the emergence of big data analysis methods, computer programming languages ​​have enabled the computer to read and understand traffic organization schemes. A digital traffic organization case library can be constructed by integrating national examples of intersection traffic organization optimization designs and relevant design standards and specifications. However, due to the vast and complex theoretical knowledge involved in intersection traffic organization design, and the broad scope of content, simple case search methods are insufficient to meet the optimization design needs of intersection traffic organization schemes. There is currently no clear solution for optimizing intersection traffic organization based on existing digital traffic organization design examples, and a feasible system architecture is lacking to address the numerous complex urban intersection traffic organization designs. Therefore, developing an intersection traffic organization auxiliary design system and equipment based on a digital case library can effectively overcome the shortcomings of the aforementioned related technologies, and has become a technical problem that the industry urgently needs to solve. Summary of the Invention

[0003] To address the aforementioned problems in existing technologies, embodiments of the present invention provide an intersection traffic organization auxiliary design system and equipment based on a digital case library.

[0004] In a first aspect, embodiments of the present invention provide an intersection traffic organization auxiliary design system based on a digital case library, comprising: an intersection traffic organization status input and problem analysis module, a digital traffic organization case library construction and update module, an intersection traffic organization scheme optimization design module, an intersection traffic organization scheme evaluation module, and a human-computer interaction module; the intersection traffic organization status input and problem analysis module is used to analyze the relevant characteristics based on the attribute values ​​of basic elements of the intersection road environment and traffic operation characteristic parameters, combined with relevant design standards and specifications, to achieve intelligent identification and causal analysis of traffic organization problems; the digital traffic organization case library construction and update module is used to organize information on relevant design schemes based on existing intersection traffic organization design examples, construct a digital traffic organization case library, and provide a basis for subsequent completion The system provides matching cases for traffic organization optimization scheme design and can input optimized schemes as new cases into the case library for updating. The intersection traffic organization scheme optimization design module is used to perform feature matching with the digital traffic organization case library, guided by the intersection traffic organization problem. Based on the theoretical framework of deep learning algorithms, it combines user design experience and relevant specifications and standards to output the preliminary design scheme for the current intersection traffic organization. The intersection traffic organization scheme evaluation module is used to comprehensively evaluate the intersection traffic organization schemes. The human-computer interaction module allows designers to compare the generated design schemes and, with the assistance of the system, adjust the schemes according to their design needs. Then, the designers judge the current schemes and output the schemes that meet the requirements to the user.

[0005] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization status quo problem analysis module, comprising: a road traffic feature input unit, used to extract and input digital features of the road environment and traffic operation feature parameters of the current intersection; a traffic organization feature analysis unit, used to match typical road traffic scenarios for the target intersection traffic organization scheme according to traffic design standards and specifications; and a traffic organization problem intelligent identification unit, used to intelligently identify and analyze the specific status quo problems of the traffic scenario to which the target intersection belongs.

[0006] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes a digital traffic organization case library construction and updating module, comprising: a digital case library construction unit, used to organize existing intersection traffic organization design instance information and input it into the system to construct a digital traffic organization case library; a traffic organization case output unit, used to provide matching case data for intersection traffic organization optimization design; and a digital case library updating unit, used to add relevant information of the optimization design scheme to the case library. The features included in each digital traffic organization case in the case library include: basic road environment element attributes and intersection operation characteristic parameters before and after intersection optimization, specific problems and causes before optimization, optimization measures taken, and comparison of effects before and after optimization, etc.

[0007] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization scheme optimization design module comprising: a digital traffic organization case matching unit, used to match digital cases for a target intersection based on the intersection traffic organization problem; a case matching degree analysis unit, used to compare and analyze the matching degree of digital cases; and a preliminary scheme generation unit, used to integrate the traffic organization optimization measures and related information adopted in the digital cases matched by the system to generate a preliminary design scheme for intersection traffic organization.

[0008] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes the following steps: First, inputting the intersection traffic organization problem obtained from the intersection traffic organization status quo problem analysis module into the intersection traffic organization scheme optimization design module; setting the case feature types read from the digital traffic organization case library; organizing the input intersection traffic organization features; determining the search method for digital traffic organization cases, mainly including: intersection attribute search and / or intersection traffic organization problem search; using a reasoning analysis method based on deep learning theory to quantitatively evaluate the matching degree of each matching case; and ranking each digital case based on the matching degree to provide a reference for the subsequent generation of preliminary design schemes. Designers predefine the number of output preliminary design schemes, and then arrange them according to the matching degree, organizing and outputting the traffic organization optimization and improvement measures of the digital cases to obtain the preliminary design scheme for intersection traffic organization.

[0009] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization scheme evaluation module comprising: a data processing and analysis unit, used to process and analyze the traffic operation status of the current traffic organization design scheme at the intersection, and extract evaluation data for subsequent scheme evaluation; an evaluation index system input unit, used to select evaluation indicators for the design scheme at the target intersection, and pre-set the corresponding evaluation system based on the evaluation indicators; and a scheme comprehensive evaluation unit, used to calculate the comprehensive evaluation index of the current intersection based on the operation data.

[0010] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes a human-computer interaction module comprising: a human-computer interaction unit for enabling designers to compare and adjust preliminary design schemes; an auxiliary design unit for providing prompts on whether the user's interactive design operations comply with relevant traffic organization design standards and specifications, and for providing feedback on the evaluation results of the current intersection traffic organization scheme; and an optimization scheme output unit for allowing designers to determine whether to output an optimized scheme.

[0011] Based on the above system embodiments, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes the following preliminary design schemes: Situation 1: Combining evaluation data, designers evaluate the preliminary design scheme generated by the system. If it meets the design requirements, it can be directly output to the user. Designers can also adjust the attributes and values ​​of relevant design elements in the scheme according to their personal needs and re-input it into the scheme evaluation module for iterative optimization until the best scheme is generated; Situation 2: If no digital case can be matched in the intersection traffic organization scheme optimization design module or the matching degree of the obtained digital case is low, the system cannot output an effective preliminary design scheme. In this case, designers can use auxiliary design units and their personal design experience to iteratively optimize the intersection traffic organization scheme based on the intersection traffic organization problem output by the system until a scheme that meets the requirements is generated.

[0012] In a second aspect, embodiments of the present invention provide an electronic device, comprising:

[0013] At least one processor; and

[0014] At least one memory communicatively connected to the processor, wherein:

[0015] The memory stores program instructions that can be executed by the processor. The processor can call the program instructions to execute the intersection traffic organization auxiliary design system based on a digital case library provided by any of the various implementation methods of the first aspect.

[0016] Thirdly, embodiments of the present invention provide a non-transitory computer-readable storage medium storing computer instructions that enable a computer to implement the intersection traffic organization auxiliary design system based on a digital case library provided by any of the various implementations of the first aspect.

[0017] The intersection traffic organization auxiliary design system and equipment based on a digital case library provided in this invention intelligently identifies the current problems and causes of intersection traffic organization from two dimensions: road environment and traffic operation characteristics. Combined with existing intersection traffic organization design example information, it can quickly and accurately generate preliminary design schemes for intersection traffic organization for designers to refer to, thereby iteratively adjusting the schemes and outputting the best scheme, thus improving work efficiency and quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an intersection traffic organization auxiliary design system based on a digital case library provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of another intersection traffic organization auxiliary design system based on a digital case library, provided as an embodiment of the present invention.

[0022] Figure 4 Another flowchart of an intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention;

[0023] Figure 5 A schematic diagram of the basic elements of the digital road environment at an intersection provided in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram illustrating typical scenarios and specific causes of traffic organization problems provided in embodiments of the present invention;

[0025] Figure 7 This is a training architecture diagram of the case matching model provided in an embodiment of the present invention;

[0026] Figure 8A schematic diagram of the comprehensive evaluation system framework provided in the embodiments of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, the technical features of the various embodiments or individual embodiments provided by the present invention can be arbitrarily combined with each other to form feasible technical solutions. Such combinations are not constrained by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] Starting from the existing road environment and traffic operation characteristics of intersections, this invention constructs a digital traffic organization case library, summarizing and organizing the characteristic information of existing traffic organization design examples. Then, based on the theoretical framework of deep learning, it matches corresponding digital cases for target intersections to generate preliminary design schemes. With the system's assistance, iterative optimization of these schemes is then completed. Based on this idea, this invention provides an intersection traffic organization auxiliary design system based on a digital case library. (See [link to relevant documentation]). Figure 1The system includes: a module for inputting and analyzing the current state of intersection traffic organization, a module for building and updating a digital traffic organization case library, a module for optimizing intersection traffic organization schemes, a module for evaluating intersection traffic organization schemes, and a human-computer interaction module. The module for inputting and analyzing the current state of intersection traffic organization is used to analyze the relevant characteristics of traffic organization problems based on the attribute values ​​of basic elements of the intersection road environment and traffic operation characteristic parameters, combined with relevant design standards and specifications, to achieve intelligent identification and causal analysis of traffic organization problems. The module for building and updating the digital traffic organization case library is used to organize information on relevant design schemes based on existing intersection traffic organization design examples, build a digital traffic organization case library, and provide matching cases for subsequent completion of traffic organization optimization scheme design. Furthermore, the system optimization scheme can be input as a new case into the case library for updating; the intersection traffic organization scheme optimization design module is used to perform feature matching with the digital traffic organization case library, based on the intersection traffic organization problem, and outputs the preliminary design scheme of the current intersection traffic organization based on the theoretical framework of deep learning algorithms, combined with the user's design experience and relevant specifications and standards; the intersection traffic organization scheme evaluation module is used to comprehensively evaluate the intersection traffic organization scheme; the human-computer interaction module allows designers to compare the generated design schemes, and with the assistance of the system, designers can adjust the schemes according to their own design needs, and then the designers judge the current schemes and output the schemes that meet the requirements to the user.

[0029] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization status quo problem analysis module, comprising: a road traffic feature input unit, used to extract and input digital features of the road environment and traffic operation feature parameters of the current intersection; a traffic organization feature analysis unit, used to match typical road traffic scenarios for the target intersection traffic organization scheme according to traffic design standards and specifications; and a traffic organization problem intelligent identification unit, used to intelligently identify and analyze the specific status quo problems of the traffic scenario to which the target intersection belongs.

[0030] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes a digital traffic organization case library construction and updating module, comprising: a digital case library construction unit, used to organize existing intersection traffic organization design instance information and input it into the system to construct a digital traffic organization case library; a traffic organization case output unit, used to provide matching case data for intersection traffic organization optimization design; and a digital case library updating unit, used to add relevant information of the optimization design scheme to the case library. The features included in each digital traffic organization case in the case library include: basic road environment element attributes and intersection operation characteristic parameters before and after intersection optimization, specific problems and causes before optimization, optimization measures taken, and comparison of effects before and after optimization, etc.

[0031] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization scheme optimization design module comprising: a digital traffic organization case matching unit, used to match digital cases for a target intersection based on the intersection traffic organization problem; a case matching degree analysis unit, used to compare and analyze the matching degree of digital cases; and a preliminary scheme generation unit, used to integrate the traffic organization optimization measures and related information adopted in the digital cases matched by the system to generate a preliminary design scheme for intersection traffic organization.

[0032] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes the following steps: First, inputting the intersection traffic organization problem obtained from the intersection traffic organization status quo problem analysis module into the intersection traffic organization scheme optimization design module; setting the case feature types read from the digital traffic organization case library; organizing the input intersection traffic organization features; determining the search method for digital traffic organization cases, mainly including: intersection attribute search and / or intersection traffic organization problem search; using a reasoning analysis method based on deep learning theory to quantitatively evaluate the matching degree of each matching case; and ranking each digital case based on the matching degree to provide a reference for the subsequent generation of preliminary design schemes. Designers predefine the number of output preliminary design schemes, and then arrange them according to the matching degree, organizing and outputting the traffic organization optimization and improvement measures of the digital cases to obtain the preliminary design scheme for intersection traffic organization.

[0033] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes an intersection traffic organization scheme evaluation module, comprising: a data processing and analysis unit, used to process and analyze the traffic operation status of the current traffic organization design scheme of the intersection, and extract evaluation data for the subsequent scheme evaluation stage; an evaluation index system input unit, used to select evaluation indicators for the design scheme of the target intersection, and pre-set the corresponding evaluation system according to the evaluation indicators; and a scheme comprehensive evaluation unit, used to calculate the comprehensive evaluation index of the current intersection in combination with the operation data.

[0034] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes a human-computer interaction module comprising: a human-computer interaction unit for enabling designers to compare and adjust preliminary design schemes; an auxiliary design unit for providing prompts on whether the user's interactive design operations comply with relevant traffic organization design standards and specifications, and for providing feedback on the evaluation results of the current intersection traffic organization scheme; and an optimization scheme output unit for allowing designers to determine whether to output an optimized scheme.

[0035] Based on the above system embodiments, as an optional embodiment, the intersection traffic organization auxiliary design system based on a digital case library provided in this embodiment of the invention includes the following preliminary design schemes: Situation 1: Combining evaluation data, designers evaluate the preliminary design schemes generated by the system. If they meet the design requirements, they can be directly output to the user. Designers can also adjust the attributes and values ​​of relevant design elements in the scheme according to their personal needs and re-input them into the scheme evaluation module for iterative optimization until the best scheme is generated; Situation 2: If no matching digital case can be found in the intersection traffic organization scheme optimization design module or the matching degree of the obtained digital case is low, the system cannot output an effective preliminary design scheme. In this case, designers can use auxiliary design units and their personal design experience to iteratively optimize the intersection traffic organization scheme based on the intersection traffic organization problem output by the system until a scheme that meets the requirements is generated.

[0036] The intersection traffic organization auxiliary design system and equipment based on a digital case library provided in this invention intelligently identifies the current problems and causes of intersection traffic organization from two dimensions: road environment and traffic operation characteristics. Combined with existing intersection traffic organization design example information, it can quickly and accurately generate preliminary design schemes for intersection traffic organization for designers to refer to, thereby iteratively adjusting the schemes and outputting the best scheme, thus improving work efficiency and quality.

[0037] In another embodiment, such as Figure 3 As shown, this embodiment provides an intersection traffic organization auxiliary design system based on a digital case library, including: matching corresponding digital traffic organization cases to the current problems of intersection traffic organization; the core modules of the system include: intersection traffic organization status input and problem analysis module 1, digital traffic organization case library construction and update module 2, intersection traffic organization scheme optimization design module 3, intersection traffic organization scheme evaluation module 4, and human-computer interaction module 5.

[0038] like Figure 4 As shown, the specific workflow of the system described in this embodiment includes:

[0039] S1) First, input the current status of the intersection traffic organization design into the traffic organization problem analysis module. The input includes, but is not limited to, the attribute parameters of basic road environment elements such as traffic signs and markings, and entrance and exit lanes, as well as traffic operation characteristic attribute parameters that can characterize road traffic efficiency and safety, such as vehicle passage time, phase queue length, etc. By analyzing the traffic organization attribute characteristic parameters, the specific problems and causes of the intersection traffic organization can be identified.

[0040] S2) Next, input the existing intersection traffic organization design examples into the system, classify them according to the characteristics of each attribute parameter of the cases, and build a digital traffic organization case library with different attribute feature labels based on this.

[0041] S3) Then, based on the established digital traffic organization case library, and taking the intersection traffic organization problem as the guide, we use deep learning algorithms to match digital traffic organization cases and generate a preliminary design scheme for intersection traffic organization.

[0042] S4) Next, the intersection traffic organization scheme evaluation module is used to evaluate the generated relevant design schemes. The schemes that pass the evaluation are input into the human-computer interaction module, where designers compare and adjust the schemes, and combine the system to complete the iterative optimization of the schemes. The designers then judge and output the optimized schemes.

[0043] S5) Finally, the system adds the output optimization solution to the digital traffic organization case library, completing the update of the digital case library.

[0044] The intersection traffic organization status input and problem analysis module 1 is mainly based on the attribute values ​​of the basic elements of the intersection road environment and the traffic operation characteristic parameters, combined with relevant design standards and specifications to analyze its relevant characteristics, thereby realizing intelligent identification and cause analysis of traffic organization problems.

[0045] The intersection traffic organization status input and problem analysis module 1 includes:

[0046] The road traffic feature input unit 1.1 is used to extract and input the digital features of the road environment and traffic operation feature parameters of the current intersection;

[0047] Traffic organization feature analysis unit 1.2 is used to match typical road traffic scenarios for the traffic organization scheme of the target intersection according to traffic design standards and specifications;

[0048] The intelligent traffic organization problem identification unit 1.3 is used to intelligently identify and analyze the causes of specific current problems in the traffic scenario of the target intersection.

[0049] The intersection traffic organization status input and problem analysis module 1 needs to extract the attributes and values ​​of the design elements of the intersection road environment and the traffic operation characteristic parameters, and then input them into the system. Firstly, the relevant characteristics of the road environment are mainly described in three ways: images, videos, and computer languages. The image files include: AutoCAD engineering drawings, 2D plan scans of the intersection, aerial photographs, etc.; the video files include: UAV 3D aerial videos, surveillance videos, etc.; the computer languages ​​include: XML, C, and Python. By digitally describing the design elements of the intersection road environment, the computer can quickly recognize and understand the intersection traffic organization scheme. Furthermore, by inputting traffic organization design standards and existing digital traffic organization case library files, the system module can continuously learn and optimize model parameters, and can autonomously identify the attribute characteristic parameters of each basic element of the target intersection road environment. Secondly, the characteristics of traffic operation at intersections are mainly extracted based on traffic operation data at intersections. The data sources mainly include data from various roadside fixed detectors, such as induction coils, geomagnetic sensors, radar, and video, as well as data from mobile detectors, such as GPS signals, mobile phone signals, driving trajectory data, and drone aerial photography data.

[0050] like Figure 5As shown, the design elements of the intersection road environment include the following basic elements: intersection spatial range, intersection shape, intersection type, right-of-way width, curb radius, intersection natural environment, entrance and exit lane design, entrance and exit lane widening design, bus stop facilities, tidal flow lanes, reversible lanes, waiting area setting, traffic signs and markings, traffic infrastructure, restricted traffic organization, pedestrian crossing methods, pedestrian crossing location and width, pedestrian safety islands, pedestrian crossing lights, phase type and number, phase sequence, phase duration, signal cycle duration, and other signal control parameters; the secondary elements of the intersection natural environment include: The design considerations include: vegetation distribution location, building scale and location; secondary elements of entrance and exit lane design include: number of lanes and lane width, lane function division; secondary elements of entrance and exit lane widening design include: widening form, widening section length, transition section length; secondary elements of traffic infrastructure include: traffic lights, isolation facilities, lighting equipment, other safety management facilities; secondary elements of other signal control parameters include: pedestrian crossing time, green light ratio, and phase difference; in addition, the key points of intersection road environment design specifically include: intersection spatial layout design, entrance and exit lane design, intersection channelization design, pedestrian crossing design, and traffic signal control scheme design.

[0051] In this embodiment, the traffic operation characteristic parameters of the intersection mainly involve two aspects: road traffic efficiency and traffic safety. The parameters characterizing road traffic efficiency mainly include: traffic volume in each direction of entrance and exit, number of vehicle stops, vehicle travel time, vehicle queue length, delay time, and intersection signal control scheme, etc. The parameters characterizing traffic safety mainly include: number of intersection traffic conflicts, intersection conflict area, proportion of left-turning vehicles, traffic conflict rate, phase clearance rate, etc.

[0052] In this embodiment, the intersection traffic organization status input and problem analysis module 1 analyzes the current traffic organization characteristics of the target intersection from two dimensions: road environment and traffic operation, based on the digital characteristics of the road environment and traffic operation characteristics. It then matches these characteristics with corresponding typical traffic scenarios to identify common causes in each scenario. For example, a typical scenario matched with the current status of the target intersection is relative road congestion. Common causes of road congestion may include an excessively large intersection area, unreasonable signal timing schemes, or multiple intersections. Determining the specific cause requires a comprehensive analysis combining the attribute characteristics of multiple design elements.

[0053] like Figure 6As shown, the analysis of specific causes of current problems at intersections reveals typical scenarios including: chaotic traffic order, relative traffic congestion, and frequent traffic accidents. Common causes of relative traffic congestion include: excessively large intersection area, insufficient number of approach lanes, mismatch between the number of approach and exit lanes, insufficient number of left-turn lanes, insufficient left-turn queuing space, unreasonable signal timing schemes, overflow queues at intersections, significant tidal flow phenomena, and multiple intersections. Common causes of chaotic traffic order include: complex intersection shape, unreasonable lane function division, lanes that are too wide or too narrow, excessively long pedestrian crossing distances, insufficient non-motorized vehicle waiting areas, entrances and exits that are too close to the intersection, unreasonable bus stop locations, inadequate isolation facilities, poor visibility of traffic signs and markings, and the absence of required traffic lights. Common causes of frequent traffic accidents include: obstructed driver visibility, severe traffic conflicts, poor visibility of traffic management facilities, and insufficient traffic safety facilities.

[0054] The digital traffic organization case library construction and update module 2 is mainly used to organize relevant design scheme information based on existing intersection traffic organization design examples, build a digital traffic organization case library, provide matching cases for subsequent completion of traffic organization optimization scheme design, and can input system optimization schemes as new cases into the case library for updating.

[0055] The digital traffic organization case library construction and updating module 2 includes:

[0056] Digital Case Library Construction Unit 2.1 is used to organize existing intersection traffic organization design examples and input them into the system to build a digital traffic organization case library;

[0057] Traffic organization case output unit 2.2 is used to provide matching case data for the optimized design of intersection traffic organization;

[0058] Digital Case Library Update Unit 2.3 is used to add relevant information about optimized design schemes to the case library.

[0059] like Figure 4 As shown in this embodiment, the specific case features of the digital traffic organization case library include: the specific situation of each case intersection before traffic organization optimization, such as the attribute characteristics of road environment design elements, traffic operation status data, specific problems and causes before optimization, which can be displayed in the form of on-site real-scene pictures and videos; in addition, it also includes: the specific operation effect of the case intersection after traffic organization optimization and the optimization measures taken, the optimization measures are mainly expressed in the form of pictures and text descriptions. During use, designers only need to click on the corresponding traffic organization problem and cause, and the system will pop up the specific overview of the matching case before and after optimization and the measures taken, and provide the intersection traffic operation status evaluation index before and after optimization for designers' reference.

[0060] The intersection traffic organization scheme optimization design module 3 is used to perform feature matching with the digital traffic organization case library based on the intersection traffic organization problem, and output the preliminary design scheme of the current intersection traffic organization based on the theoretical framework of deep learning algorithm, combined with the user's design experience and relevant specifications and standards.

[0061] The intersection traffic organization scheme optimization design module 3 includes

[0062] Digital traffic organization case matching unit 3.1 is used to match digital cases for target intersections, focusing on intersection traffic organization issues.

[0063] Case matching analysis unit 3.2 is used to compare and analyze the matching degree of digital cases;

[0064] The preliminary scheme generation unit 3.3 is used to integrate the traffic organization optimization measures and other relevant information adopted in the digital cases matched by the system to generate a preliminary design scheme for the traffic organization of the intersection.

[0065] The workflow for feature matching in the digital traffic organization case library includes:

[0066] S1) Input the intersection traffic organization problems obtained from the intersection traffic organization status problem analysis module into the intersection traffic organization scheme optimization design module, and set the case feature types to be read from the digital traffic organization case library;

[0067] S2) Organize the input intersection traffic organization features and determine the search method for digital traffic organization cases. This mainly includes two methods: intersection attribute search and intersection traffic organization problem search, or a combination of the two methods.

[0068] S3) Quantitatively evaluate the matching degree of each matching case using reasoning analysis methods based on deep learning theory, and rank each digitized case based on the matching degree, thereby providing a reference for the generation of subsequent preliminary design schemes.

[0069] like Figure 7 As shown in the figure, this embodiment illustrates a training diagram for digital case feature matching based on the pre-trained language representation model (Bidirectional Encoder Representations from Transformer, BERT). The specific training process of the model is as follows:

[0070] S1) First, use the BERT model to extract the attribute features of the current intersection (such as intersection type and intersection form) and traffic organization problems and their causes (such as intersection queue overflow and excessive pedestrian crossing time);

[0071] S2) Next, an LSTM network is used to aggregate multiple features into the final digital case feature representation;

[0072] S3) Then, establish the triplet loss function and the adversarial comparison loss to determine the matching degree between the current intersection traffic organization scheme and each case in the triplet, and select the digital case with the highest similarity to the current intersection traffic organization scheme.

[0073] S4) Finally, by continuously updating the digital case combination of the triples, the matching degree of all digital cases can be obtained through iterative cycles.

[0074] The formula for representing case features in the BERT model is as follows:

[0075]

[0076] In formula (1), Let {x1, x2, ..., x} be the hidden layer states of the forward and backward LSTMs, respectively. Concatenating these two vectors yields the global feature vector h for this case. k} represents the k features of this case.

[0077] The formula for calculating the feature matching degree is expressed as follows:

[0078]

[0079] In formula (2), L tri The case matching score is denoted as ; N is the number of cases currently input. This is the feature vector of the current intersection traffic organization attributes; γ is the attribute feature vector of the random digitized case; γ is the threshold parameter.

[0080] The output of the preliminary design scheme allows designers to predefine the number of output preliminary design schemes, and then arrange them in order of matching degree to organize and output the traffic organization optimization and improvement measures of the digital case, thereby obtaining the preliminary design scheme of intersection traffic organization.

[0081] The intersection traffic organization scheme evaluation module 4 is used to conduct a comprehensive evaluation of the intersection traffic organization scheme;

[0082] The intersection traffic organization scheme evaluation module 4 includes:

[0083] The data processing and analysis unit 4.1 is used to process and analyze the traffic operation status of the current traffic organization design scheme at the intersection, and extract evaluation data for the subsequent scheme evaluation stage.

[0084] The evaluation index system input unit 4.2 is used to select the evaluation index for the design scheme of the target intersection and to pre-set the corresponding evaluation system based on the evaluation index;

[0085] The comprehensive evaluation unit 4.3 is used to calculate the comprehensive evaluation index of the current intersection by combining the operational data.

[0086] In this embodiment, the data processing and analysis unit 4.1 is used to process and analyze relevant data of the optimized and improved intersection. Since the traffic operation environment will change after the target intersection is optimized, the designers need to predict the traffic conditions of the optimized intersection as evaluation data of the intersection.

[0087] The evaluation index system input unit 4.2 allows designers to select evaluation indicators and evaluation systems according to their design needs. The evaluation indicators include two aspects: intersection traffic efficiency and intersection safety. The evaluation system is a comprehensive evaluation index that integrates multiple evaluation indicators and different entrance and exit lane flow directions, including: comprehensive operation index of each entrance turning at the intersection, comprehensive operation index of each entrance at the intersection, and comprehensive operation index of the intersection.

[0088] The comprehensive evaluation unit 4.3 is used to output the comprehensive evaluation results of the intersection. Based on the evaluation data, evaluation indicators and evaluation system, it uses the analytic hierarchy process to conduct a comprehensive evaluation from the two aspects of intersection traffic efficiency and intersection safety. The system will allocate the weights between each indicator according to the designer's needs and conduct a comprehensive evaluation based on the intersection traffic flow prediction data after the improved design.

[0089] like Figure 8 As shown, the overall goal of evaluating intersection traffic organization schemes is: comprehensive evaluation of road intersections. The first-level evaluation indicators of the evaluation system include: comprehensive operation index of turning at each intersection entrance, comprehensive operation index of each intersection entrance, and comprehensive operation index of the intersection. The second-level evaluation indicators of the evaluation criteria include: intersection traffic efficiency and intersection safety. Among them, the evaluation indicators of intersection traffic efficiency include: average vehicle delay time, average number of stops, and average queue length. Among them, the evaluation indicators of intersection safety include: vehicle conflict rate, phase clearance rate, and intersection conflict point density.

[0090] The human-computer interaction module 5 is used to allow designers to compare the generated design schemes, and with the assistance of the system, designers can adjust the schemes according to their own design needs. Then, the designers judge the current schemes and output the schemes that meet the requirements to the users.

[0091] The human-computer interaction module 5 includes:

[0092] Human-computer interaction unit 5.1 is used to enable designers to compare and adjust preliminary design schemes;

[0093] The auxiliary design unit 5.2 is used to provide prompts on whether the user's interactive design operations comply with relevant traffic organization design standards and specifications, as well as to provide feedback on the evaluation results of the current intersection traffic organization scheme;

[0094] The optimization scheme output unit 5.3 is used to allow designers to determine whether to output an optimization scheme.

[0095] In this embodiment, the human-computer interaction unit 5.1 allows designers to select, modify, add, and delete preliminary schemes based on their personal experience and knowledge within the system software, according to the generated relevant schemes. The schemes are then re-entered into the scheme evaluation module 4 for iterative optimization until they meet design requirements. If the scheme meets the designer's requirements, it can be output. The auxiliary design unit 5.2 compares the intersection traffic organization scheme after each step of the designer's operation with relevant design specifications and standards, providing real-time feedback on the comprehensive evaluation results. For areas that do not meet the specifications, the system will promptly provide reminders and voice prompts, and display the specific requirements of the relevant standards and specifications, as well as modification suggestions, thus achieving iterative feedback optimization of the intersection traffic organization scheme. The optimized scheme output unit 5.3 allows designers to judge the current design scheme. Its main function is to output the optimized scheme that meets the design requirements to the user through the output unit.

[0096] The human-computer interaction module may present the following situations regarding the preliminary design scheme:

[0097] Scenario 1: Based on the evaluation data, the designers evaluate the preliminary design scheme generated by the system. If it meets the design requirements, it can be directly output to the user. Alternatively, the designers can adjust the attributes and values ​​of relevant design elements in the scheme according to their personal needs and re-enter it into the scheme evaluation module for iterative optimization until the best scheme is generated.

[0098] Scenario 2: If no digital case can be matched in the intersection traffic organization scheme optimization design module, or if the matched digital case has a low degree of matching, the system cannot output a valid preliminary design scheme. In this case, the designer can use the auxiliary design unit and personal design experience to iteratively optimize the intersection traffic organization scheme based on the intersection traffic organization problem output by the system until a scheme that meets the requirements is generated.

[0099] This embodiment's research on intersection traffic organization design goes beyond simply optimizing intersection traffic organization schemes through computer data processing technology. This embodiment can quickly, intelligently, and comprehensively simulate all the basic elements of the road environment in the target intersection traffic organization scheme. Designers can also extract traffic operation characteristic parameters and, by constructing a digital traffic organization case library, accurately locate the current problems of intersection traffic organization schemes and provide corresponding optimization measures. This embodiment places greater emphasis on using the digital traffic organization case library to design and improve intersection traffic organization, providing designers with a simpler and more efficient traffic organization design method.

[0100] The system in this embodiment of the invention is implemented using electronic devices; therefore, it is necessary to introduce the relevant electronic devices. For this purpose, the embodiments of the present invention provide an electronic device, such as… Figure 2 As shown, the electronic device includes: at least one processor, a communication interface, at least one memory, and a communication bus, wherein the at least one processor, the communication interface, and the at least one memory communicate with each other via the communication bus. The at least one processor can invoke logical instructions stored in the at least one memory to implement various systems provided in the system embodiments.

[0101] Furthermore, when the logical instructions in at least one of the aforementioned memories can be implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the system described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0102] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to implement the methods or systems described in or in part of the various embodiments.

[0104] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. Based on this understanding, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, or sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0105] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A traffic organization auxiliary design system for intersections based on a digital case library, characterized in that, include: The system includes modules for inputting current traffic organization status and analyzing problems, building and updating a digital traffic organization case library, optimizing and designing traffic organization schemes for intersections, evaluating traffic organization schemes for intersections, and human-computer interaction. The intersection traffic organization status input and problem analysis module is used to analyze the relevant characteristics of traffic organization problems based on the attribute values ​​of basic elements of the intersection road environment and traffic operation characteristic parameters, combined with relevant design standards and specifications, so as to realize intelligent identification and cause analysis of traffic organization problems. The digital traffic organization case library construction and update module is used to organize relevant design scheme information based on existing intersection traffic organization design examples, build a digital traffic organization case library, provide matching cases for subsequent completion of traffic organization optimization scheme design, and can also input system optimization schemes as new cases into the case library for updating. The intersection traffic organization scheme optimization design module is used to target intersection traffic organization problems, perform feature matching with a digital traffic organization case library, and output a preliminary design scheme for the current intersection traffic organization based on the theoretical framework of deep learning algorithms, combined with the user's design experience and relevant specifications and standards. The intersection traffic organization scheme evaluation module is used to comprehensively evaluate intersection traffic organization schemes. The human-computer interaction module allows designers to compare the generated design solutions and, with the assistance of the system, adjust the solutions according to their own design needs. Then, the designers judge the current solution and output the solution that meets the requirements to the user. The intersection traffic organization status quo problem analysis module includes: The road traffic feature input unit is used to extract and input the digital features of the road environment and traffic operation features of the current intersection. The traffic organization feature analysis unit is used to match typical road traffic scenarios for the traffic organization scheme of the target intersection according to traffic design standards and specifications; among which, typical scenarios include: chaotic traffic order, relatively congested traffic, and frequent traffic accidents; The intelligent traffic organization problem identification unit is used to intelligently identify and analyze the specific current situation problems of the traffic scenario at the target intersection. Causes of relative traffic congestion include: excessively large intersection area, insufficient number of approach lanes, mismatch between entrance and exit lanes, insufficient left-turn lanes, insufficient left-turn queuing space, unreasonable signal timing scheme, intersection queue overflow, significant tidal flow, and multiple intersections. Causes of chaotic traffic order include: complex intersection shape, unreasonable lane function division, lanes that are too wide or too narrow, excessive pedestrian crossing distance, insufficient non-motorized vehicle waiting areas, entrances and exits that are too close to the intersection, unreasonable bus stop location, lack of reasonable isolation facilities, poor visibility of traffic signs and markings, and failure to install required traffic lights. Causes of frequent traffic accidents include: obstructed driver visibility, severe traffic conflicts, poor visibility of traffic management facilities, and insufficient traffic safety facilities. The module for building and updating the digital traffic organization case library includes: The digital case library construction unit is used to organize existing intersection traffic organization design examples and input them into the system to build a digital traffic organization case library. The traffic organization case output unit is used to provide matching case data for the optimized design of traffic organization at intersections. The digital case library update unit is used to add relevant information of optimized design schemes to the case library. The features of each digital traffic organization case in the case library include: basic road environment element attributes and intersection operation characteristic parameters before and after intersection optimization, specific problems and causes before optimization, optimization measures taken, and comparison of effects before and after optimization. The intersection traffic organization scheme optimization design module includes: The digital traffic organization case matching unit is used to match digital cases for target intersections, focusing on intersection traffic organization issues. The case matching analysis unit is used to compare and analyze the degree of matching of digital cases; The preliminary scheme generation unit is used to integrate the traffic organization optimization measures and related information adopted in the digital cases matched by the system to generate a preliminary design scheme for the traffic organization of the intersection. The comparative analysis of the matching degree of digital cases includes: inputting the intersection traffic organization problems obtained from the intersection traffic organization status problem analysis module into the intersection traffic organization scheme optimization design module, and setting the case feature types read from the digital traffic organization case library; The input intersection traffic organization features are processed to determine the search methods for digital traffic organization cases, mainly including: intersection attribute search and / or intersection traffic organization problem search. A deep learning-based reasoning analysis method is used to quantitatively evaluate the matching degree of each case, and each digital case is ranked based on its matching degree to provide a reference for the generation of subsequent preliminary design schemes. Designers predefine the number of output preliminary design schemes, and then arrange them according to the matching degree. The traffic organization optimization and improvement measures of the digital cases are then processed and output to obtain the preliminary design scheme for intersection traffic organization.

2. The intersection traffic organization auxiliary design system based on a digital case library according to claim 1, characterized in that, The intersection traffic organization scheme evaluation module includes: The data processing and analysis unit is used to process and analyze the traffic operation status of the current traffic organization design scheme at the intersection, and extract evaluation data for the subsequent scheme evaluation stage. The evaluation index system input unit is used to select evaluation indexes for the design scheme of the target intersection and to pre-set the corresponding evaluation system based on the evaluation indexes. The comprehensive evaluation unit is used to calculate the comprehensive evaluation index of the current intersection by combining operational data.

3. The intersection traffic organization auxiliary design system based on a digital case library according to claim 2, characterized in that, The human-computer interaction module includes: The human-computer interaction unit is used to enable designers to compare and adjust preliminary design schemes; The auxiliary design unit is used to provide prompts on whether the user's interactive design operations comply with relevant traffic organization design standards and specifications, as well as to provide feedback on the evaluation results of the current intersection traffic organization scheme; The optimization solution output unit is used to allow designers to determine whether to output an optimization solution.

4. The intersection traffic organization auxiliary design system based on a digital case library according to claim 3, characterized in that, The preliminary design scheme includes: Scenario 1: Based on the evaluation data, the designers evaluate the preliminary design scheme generated by the system. If it meets the design requirements, it can be directly output to the user. The designers can also adjust the attributes and values ​​of relevant design elements in the scheme according to their personal needs and re-enter them into the scheme evaluation module for iterative optimization until the best scheme is generated. Scenario 2: If no matching digital case can be found in the intersection traffic organization scheme optimization design module, or if the matching degree of the obtained digital case is low, the system cannot output an effective preliminary design scheme. In this case, the designer can use auxiliary design units and personal design experience to iteratively optimize the intersection traffic organization scheme based on the intersection traffic organization problem output by the system until a scheme that meets the requirements is generated.

5. An electronic device, characterized in that, include: At least one processor, at least one memory, a communication interface, and a bus; wherein, The processor, memory, and communication interface communicate with each other through the bus; The memory stores program instructions that can be executed by the processor, which invokes the program instructions to implement the system as described in any one of claims 1 to 4.

6. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions that cause the computer to implement the system as claimed in any one of claims 1 to 4.

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