A road broadcast real-time traffic information release system

Abstract

This invention discloses a road broadcast real-time traffic information publishing system, relating to the technical field of urban traffic management. The system comprises field equipment and a control center; the field equipment communicates with the control center via a fiber optic network; the control center comprises a client, a control host, and a database server; the control host comprises an interface layer, a business layer, and a data layer. The system collects real-time road condition information, analyzes and processes the collected data, determines the current road condition, generates and publishes information, and then sends a display command from the control host to the field equipment for display, thereby improving the accuracy of real-time road information detection.

Description

Technical Field

[0001] The invention belongs to the technical field of urban traffic management, and in particular relates to a road broadcast real-time traffic information publishing system. Background Art

[0002] Entering the 21st century, with the continued growth of the domestic economy and rising incomes, the number of motor vehicles has begun to rise rapidly. Urban road traffic infrastructure is becoming increasingly inadequate, and the structure and functionality of the road network are struggling to adapt to current traffic demands. As a result, urban roads, especially those in large and medium-sized cities, are facing a new round of traffic congestion. Resolving urban traffic congestion requires a multi-faceted approach, and intelligent transportation systems are a key way to improve traffic efficiency, alleviate congestion, and facilitate travel.

[0003] Currently, the focus is on collecting and disseminating traffic information on urban expressways. Research on information detection and dissemination for urban surface roads is limited, and there is no practical application. The methods for detecting and disseminating traffic flow and information on expressways and surface roads differ significantly: Expressways have continuous traffic flow, and the average speed of a road section can be detected with relatively high accuracy using loop detectors. Travel time for a road section can also be obtained through processing the data collected by loop detectors. When disseminating information, average speed or travel time can be classified into different levels to indicate congestion or smooth traffic flow. On the other hand, surface roads have intermittent traffic flow, and many factors affect traffic congestion, such as traffic lights, illegal parking, traffic accidents, and pedestrian and cyclist violations. Therefore, detecting and disseminating traffic flow on surface roads becomes relatively difficult, and the detection accuracy does not meet the requirements for public release.

[0004] National Patent CN1584943A relates to a traffic information display system based on intelligent traffic management system control. This invention obtains real-time traffic information through a road traffic condition monitoring system. This information is processed by a traffic monitoring management center and generates corresponding real-time traffic sign information for all traffic sign display boards within the jurisdiction. The traffic information published in this patent is obtained through a road traffic monitoring system, where monitors collect traffic conditions for publication. However, the traffic data obtained by this method is relatively low in accuracy, and data obtained through manual monitoring is difficult to meet publication requirements. Furthermore, this data is not suitable for multiple forms of publication.

[0005] National Patent CN1967622A discloses a system for predicting urban road traffic flow and inducing traffic information. The system consists of a traffic information collection subsystem, a communication subsystem, a comprehensive traffic information processing platform, a traffic information dissemination subsystem, and a closed-circuit television monitoring subsystem. The traffic information dissemination subsystem directly transmits real-time traffic information to the vehicle-facing traffic scene. The patent does not specify whether the method is applicable to urban expressways or surface roads. However, since the patent's traffic information collection equipment primarily utilizes coil detectors, it is not suitable for disseminating traffic information on surface roads. Summary of the Invention

[0006] The purpose of the present invention is to provide a road broadcast real-time traffic information release system, which solves the problems of insufficient accuracy of existing road real-time information detection and untimely release of traffic information by collecting road information in real time and encrypting the released information and judging the timeliness and weight.

[0007] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a road broadcast real-time traffic information release system, including field equipment and a control center.

[0009] The outfield equipment communicates with the control center via an optical fiber network; the outfield equipment includes one or more of a traffic guidance screen, a traffic broadcast, a street light, a traffic signal light, a variable signal sign, a surveillance camera, and a dynamic lane indicator;

[0010] The control center includes a client, a control host and a database server; the client is connected to the control host for communication, and when the client publishes information, the control host is connected to the external device for communication, and the control host sends a display command to the external device for information display;

[0011] The control host includes an interface layer, a business layer and a data layer;

[0012] The interface layer includes a real-time traffic condition display module, an emergency information release module, a planned event information release module, a predicted travel time release module, a traffic warning information release module and a traffic facility location display module;

[0013] The business layer includes a real-time traffic condition publishing module, an emergency information publishing module, a system equipment location display module, and a construction information display module;

[0014] The data layer includes real-time road condition information, traffic management information, traffic event information, traffic flow status prediction, traffic facility information and warning information.

[0015] Among them, the client is the software provided to users, including modules such as map display, program management, induction screen management, user management, and system management. Map display provides a management method based on electronic maps. The system uses electronic maps to intuitively display objects or information such as induction screens and road conditions. Program management refers to the management of content published on LED induction screens. Induction screen management supports adding and deleting induction screens; supports marking the location of induction screens on maps; supports modifying the basic information of induction screens. Supports control of induction screens, including the power switch and screen brightness of induction screens. Provides induction screen status viewing function, where users can see information such as the screen temperature, display brightness, whether the power is on, and whether the communication is normal. User management supports user addition, deletion, and modification functions, and supports user authority control. System management supports logging of all user operations in the system. All logs cannot be deleted once recorded, and provides log viewing function.

[0016] The control center also includes multiple service modules such as the central-end communication module, unified service interface, synthetic publishing service, display screen communication service, fault detection service, HA cluster service, etc. The central-end communication module is responsible for communicating with the client communication module, and forwarding the operation request sent by the client to the unified service interface module. The unified interface service is the server-side implementation corresponding to all client operation functions. This service can also realize the control function of receiving the integrated command platform. Synthetic publishing service: responsible for the synthesis and publication of automatic program list and manual program list content. Database access service: responsible for database insertion, modification, deletion, query and other operations. Display screen communication service: responsible for communication with the industrial control computer of the outdoor display screen. Fault detection service: responsible for regular detection of the status of all outdoor display screens, and alarming for abnormal conditions such as equipment failure. HA cluster service: responsible for double-click fault tolerance, automatically switching to another normal server in the event of a server failure to achieve uninterrupted operation of the system.

[0017] The control host adopts a high-availability cluster architecture; the control host is composed of multiple servers. When a server fails, the system automatically switches to another non-faulty server.

[0018] As a preferred technical solution, when the control host sends a display command to the field device, it is necessary to call the encryption interface to digitally sign and encrypt the information to be sent. The private key of the algorithm is , the public key is , the specific encryption process is as follows:

[0019] Step S1: Use The algorithm generates a summary of the original display command information;

[0020] Step S2: The control host sends the private key pass The data signature algorithm encrypts the summary and generates a digital signature;

[0021] Step S3: Use Algorithm key Encrypt the digital signature and original display command information to generate ciphertext ;

[0022] Step S4: External device public key pass Public key encryption algorithm Encrypt and generate key ciphertext;

[0023] Step S5: Send the information ciphertext and key ciphertext to the external device.

[0024] As a preferred technical solution, the external field device receives the information ciphertext and the key ciphertext and decrypts it. The private key of the algorithm is , the public key is , the specific decryption process is as follows:

[0025] Step J1: Field equipment The private key of the algorithm Decrypt the key ciphertext and get Algorithm key ;

[0026] Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature;

[0027] Step J3: Used to control the host Public key of the algorithm , get the initial summary;

[0028] Step J4: Use The algorithm generates a summary of the plaintext message;

[0029] Step J5: Compare the plaintext summary with the initial summary to see if they are consistent. If they are consistent, the obtained plaintext summary is the original information and is played and displayed; if they are inconsistent, the information is illegal, the information playback is terminated, and an alarm prompt is generated.

[0030] As a preferred technical solution, before issuing the warning information, the traffic warning information release module needs to determine the percentage of advance and lag between the sending time of the warning information and the warning time scale to determine the timeliness of the warning information release. The specific relationship formula for establishing the warning information release and dissemination timeliness model is:

[0031] ;

[0032] In the formula, S is the timeliness of the warning during this period, n is the number of field equipment, T is the warning time scale, The time when the warning information is sent. The arrival time of the warning information.

[0033] The real-time traffic condition display module is used to collect traffic information in real time based on road equipment, and display the road condition information in real time based on the GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic maps, and uses red, yellow and green colors to represent the three traffic states of road congestion, slowness and smoothness respectively.

[0034] The predicted travel time release module integrates traffic flow data, speed and road occupancy into road condition information, traffic control information, historical travel information, traffic flow status prediction information, and event information through traffic information fusion processing and analysis, and combines it with the electronic road network map of lane-level GIS to realize the release of road predicted communication time.

[0035] Based on GIS maps, information on sudden traffic events such as traffic accidents, road congestion, construction repairs, bad weather, group activities, etc. is displayed in real time.

[0036] Traffic Information Notice Board: A notice board is set up on the website interface to continuously display the latest traffic information. Clicking on a piece of information will automatically locate it on the electronic map. Notice information includes information on traffic accidents, congested roads, construction repairs, bad weather, group activities, and other sudden traffic events.

[0037] GIS electronic map display: When the map is zoomed in to a certain scale, intuitive icons can be used to display information on traffic emergencies such as accidents, congestion, construction repairs, severe weather, and group activities. Users can view specific traffic event information by clicking on the corresponding icon.

[0038] As a preferred technical solution, the traffic warning information release module judges the probability of event information and releases information when the probability of an event exceeds the preset probability. Suppose the independent variable affecting event y is , the probability of taking the value 1 is , then the probability of taking the value as 0 is , the probability function of the regression model is: ;

[0039] Where, is a constant term, is the partial regression coefficient of the regression model.

[0040] As a preferred technical solution, the business layer needs to evaluate the release index weight of the event when publishing information. The specific steps are as follows:

[0041] Step 1: Road emergency information release evaluation index system, constructing a pairwise comparison interval number index judgment matrix ;

[0042] Step 2: Calculate the normalized interval weight vectors of the first-level and second-level indicators using the nonlinear programming model ;

[0043] Step 3: According to the hierarchical affiliation of the indicators, calculate the weight vector of the combined interval number of each secondary indicator for the evaluation target ;

[0044] Step 4: Calculate the possibility of the size of the interval number, construct the possibility judgment matrix M, calculate the sorting weight vector of the possibility judgment matrix M, and sort the indicators according to the size of their components.

[0045] As a preferred technical solution, the matrix M is defined as follows:

[0046] ;

[0047] Then calculate the sorting weight vector ;

[0048] ;

[0049] Obtain the sorting weight vector Finally, the indicators are sorted and reported according to their size.

[0050] The present invention has the following beneficial effects:

[0051] The present invention collects real-time road condition information, analyzes and processes the collected data, determines the current road information and generates and publishes information, and the control host sends a display command to the field equipment for display, thereby improving the accuracy of real-time road information detection.

[0052] The present invention encrypts the display command sent by the control host and displays it after decryption by the external device, thereby improving the authenticity and security level of the display command transmission and avoiding the external device from being damaged due to mistransmission of the message;

[0053] The present invention judges the timeliness of the display command sent by the control host, and stops broadcasting when it is judged that the current command is invalid, thereby avoiding repeated broadcasting of outdated messages and improving information broadcasting efficiency.

[0054] The present invention evaluates the weight of publishing indicators for the display commands sent by the control host. When multiple messages need to be broadcast simultaneously, the indicator weight of each message is calculated to judge the importance of the information, and the important messages are broadcast first, thereby improving the efficiency of information broadcasting.

[0055] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0057] Figure 1 The figure is a structural diagram of a road broadcast real-time traffic information release system of the present invention. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] To make the purpose, technical solutions and advantages of this application clearer, Figure 1 The implementation methods of this application are described in further detail.

[0061] Before introducing the embodiments of the present application, the traffic information publishing system is first described.

[0062] A traffic information dissemination system is a traffic control method that uses specific media to provide road users with actual road conditions, reminding, advising, or controlling them to choose optimal routes, thereby avoiding and minimizing travel delays and losses. From a macro perspective, by rationally guiding traffic flow, it can optimize traffic distribution across the entire road network and improve network efficiency. Currently, mainstream traffic information dissemination methods include the internet, mobile devices, outdoor traffic guidance signs, and traffic broadcasts.

[0063] Features include:

[0064] General Information Release: Displays general traffic information, such as traffic regulations and promotional slogans. Multiple messages are played in turn according to the set display time. The content and display time of the information can be changed through the system.

[0065] Manual information release: Weather conditions, traffic control information, road construction information, and other information can be manually sent to outdoor guidance signs for display. It can be set to display immediately after sending or to be sent at a set time.

[0066] Automatically release information: The system can receive the guidance information generated by the confirmed integrated command system, such as traffic flow data, traffic congestion information, emergency event information and other guidance information, and the information that needs to be sent is associated with a set of guidance sign numbers and location information, and sent to the corresponding traffic guidance sign display through the system upper software.

[0067] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1 It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0068] See also Figure 1 As shown, the present invention is a road broadcast real-time traffic information release system, including field equipment and a control center.

[0069] The external equipment communicates with the control center via an optical fiber network; the external equipment includes one or more of a traffic guidance screen, traffic broadcast, street lamps, traffic lights, variable signal signs, surveillance cameras, and dynamic lane indicators;

[0070] The control center includes a client, a control host, and a database server; the client communicates with the control host. When the client publishes information, the control host communicates with the field equipment, and the control host sends a display command to the field equipment to display the information.

[0071] The control host includes the interface layer, business layer and data layer;

[0072] The interface layer includes a real-time traffic condition display module, an emergency information release module, a planned event information release module, a predicted travel time release module, a traffic warning information release module, and a traffic facility location display module;

[0073] The business layer includes real-time traffic condition publishing module, emergency information publishing module, system equipment location display module and construction information display module;

[0074] The data layer includes real-time road condition information, traffic management information, traffic incident information, traffic flow status prediction, traffic facility information and early warning information.

[0075] Among them, the client is the software provided to users, including modules such as map display, program management, induction screen management, user management, and system management. Map display provides a management method based on electronic maps. The system uses electronic maps to intuitively display objects or information such as induction screens and road conditions. Program management refers to the management of content published on LED induction screens. Induction screen management supports adding and deleting induction screens; supports marking the location of induction screens on maps; supports modifying the basic information of induction screens. Supports control of induction screens, including the power switch and screen brightness of induction screens. Provides induction screen status viewing function, where users can see information such as the screen temperature, display brightness, whether the power is on, and whether the communication is normal. User management supports user addition, deletion, and modification functions, and supports user authority control. System management supports logging of all user operations in the system. All logs cannot be deleted once recorded, and provides log viewing function.

[0076] The control center also includes multiple service modules such as the central-end communication module, unified service interface, synthetic publishing service, display screen communication service, fault detection service, HA cluster service, etc. The central-end communication module is responsible for communicating with the client communication module, and forwarding the operation request sent by the client to the unified service interface module. The unified interface service is the server-side implementation corresponding to all client operation functions. This service can also realize the control function of receiving the integrated command platform. Synthetic publishing service: responsible for the synthesis and publication of automatic program list and manual program list content. Database access service: responsible for database insertion, modification, deletion, query and other operations. Display screen communication service: responsible for communication with the industrial control computer of the outdoor display screen. Fault detection service: responsible for regular detection of the status of all outdoor display screens, and alarming for abnormal conditions such as equipment failure. HA cluster service: responsible for double-click fault tolerance, automatically switching to another normal server in the event of a server failure to achieve uninterrupted operation of the system.

[0077] The control host adopts a high-availability cluster architecture; the control host consists of multiple servers. When a server fails, the system automatically switches to another non-faulty server.

[0078] When the control host sends a display command to the field device, it needs to call the encryption interface to digitally sign and encrypt the information to be sent. The private key of the algorithm is , the public key is , the specific encryption process is as follows:

[0079] Step S1: Use The algorithm generates a summary of the original display command information;

[0080] Step S2: The control host sends the private key pass Data signature algorithm encrypts the summary and generates a digital signature; Step S3: Use Algorithm key Encrypt the digital signature and original display command information to generate ciphertext ;

[0081] Step S4: External device public key pass Public key encryption algorithm Encrypt and generate key ciphertext;

[0082] Step S5: Send the information ciphertext and key ciphertext to the external device.

[0083] The external equipment receives the information ciphertext and key ciphertext and decrypts them. The private key of the algorithm is The public key is , The algorithm key is , The algorithm key is , the specific decryption process is as follows:

[0084] Step J1: Field equipment The private key of the algorithm Decrypt the key ciphertext and get Algorithm key ;

[0085] Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature;

[0086] Step J3: Used to control the host Public key of the algorithm , get the initial summary;

[0087] Step J4: Use The algorithm generates a summary of the plaintext message;

[0088] Step J5: Compare the plaintext summary with the initial summary to see if they are consistent. If they are consistent, the obtained plaintext summary is the original information and is played and displayed; if they are inconsistent, the information is illegal, the information playback is terminated, and an alarm prompt is generated.

[0089] Before issuing warning information, the traffic warning information release module needs to determine the percentage of advance and lag between the warning time scale and the sending time of the warning information to determine the timeliness of the warning information release. The specific relationship formula for establishing the warning information release and dissemination timeliness model is:

[0090] ;

[0091] In the formula, S is the timeliness of the warning during this period, n is the number of field equipment, T is the warning time scale, The time when the warning information is sent. The arrival time of the warning information.

[0092] The real-time traffic condition display module is used to collect traffic information in real time based on road equipment, and display the road condition information in real time based on the GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic maps, and uses red, yellow and green colors to represent the three traffic states of road congestion, slowness and smoothness respectively.

[0093] The predicted travel time release module integrates traffic flow data, speed and road occupancy into road condition information, traffic control information, historical travel information, traffic flow status prediction information, and event information through traffic information fusion processing and analysis, and combines it with the electronic road network map of lane-level GIS to realize the release of road predicted communication time.

[0094] Based on GIS maps, information on sudden traffic events such as traffic accidents, road congestion, construction repairs, bad weather, group activities, etc. is displayed in real time.

[0095] Traffic Information Notice Board: A notice board is set up on the website interface to continuously display the latest traffic information. Clicking on a piece of information will automatically locate it on the electronic map. Notice information includes information on traffic accidents, congested roads, construction repairs, bad weather, group activities, and other sudden traffic events.

[0096] GIS electronic map display: When the map is zoomed in to a certain scale, intuitive icons can be used to display information on traffic emergencies such as accidents, congestion, construction repairs, severe weather, and group activities. Users can view specific traffic event information by clicking on the corresponding icon.

[0097] The traffic warning information release module judges the probability of event information and releases information when the probability of an event exceeds the preset probability. Suppose the independent variable affecting event y is , the probability of taking the value 1 is , then the probability of taking the value as 0 is , the probability function of the regression model is:

[0098] ;

[0099] Where, is a constant term, is the partial regression coefficient of the regression model;

[0100] The traffic warning information release module integrates traffic flow data, speed, road occupancy, and other data through traffic information fusion processing and analysis. It also integrates road condition information, traffic control information, historical travel times, traffic flow status forecasts, and event information. Combined with lane-level GIS-based electronic road network maps, it publishes predicted travel times for major roads such as arterials and tunnels. The website provides a user interface that allows authorized users to manually set reference thresholds based on road characteristics, traffic flow distribution characteristics, and comparison time.

[0101] The planned event information release module is based on GIS electronic maps to realize the release of planned event information, such as traffic control, construction, assembly, etc.

[0102] A. Traffic Information Announcement List:

[0103] Road maintenance and renovation information is released, allowing website users to view the status of road maintenance and renovation work on a map. The system provides a list of maintenance and renovation plans for a specified time period. Clicking on a specific information item automatically locates it on the electronic map. Users can search for specific road construction information by road name. Traffic control information is released: Website users can view the latest traffic control information on a map. The system provides a list of traffic control information for users to view. Clicking on a specific information item automatically locates it on the electronic map. Users can search for a specific road by road name to view the traffic control status.

[0104] B. GIS electronic map display: When the map is zoomed in to a certain scale, the GIS map can display information about currently scheduled traffic events, such as traffic control, construction, and rallies, through intuitive icons. Users can view specific traffic event information by clicking on the corresponding icon. When the business layer releases information, it needs to evaluate the release index weight of the event. The specific steps are as follows:

[0105] Step 1: Road emergency information release evaluation index system, constructing a pairwise comparison interval number index judgment matrix ;

[0106] Step 2: Calculate the normalized interval weight vectors of the first-level and second-level indicators using the nonlinear programming model ;

[0107] Step 3: According to the hierarchical affiliation of the indicators, calculate the weight vector of the combined interval number of each secondary indicator for the evaluation target ;

[0108] Step 4: Calculate the possibility of the size of the interval number, construct the possibility judgment matrix M, calculate the sorting weight vector of the possibility judgment matrix M, and sort the indicators according to the size of their components. After sorting the information, broadcast the information with large components first, and then broadcast the information from large to small.

[0109] The matrix M is defined as follows:

[0110] ;

[0111] Then calculate the sorting weight vector ;

[0112] ;

[0113] Obtain the sorting weight vector Finally, the indicators are sorted and reported in descending order according to their size.

[0114] It is worth noting that in the above system embodiment, the various units included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0115] In addition, those skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiments can be accomplished by instructing related hardware through a program, and the corresponding program can be stored in a computer-readable storage medium.

[0116] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A road broadcast real-time traffic information release system, including field equipment and a control center, characterized by: The outfield equipment communicates with the control center via an optical fiber network; the outfield equipment includes one or more of a traffic guidance screen, a traffic broadcast, a street light, a traffic signal light, a variable signal sign, a surveillance camera, and a dynamic lane indicator; The control center includes a client, a control host and a database server; the client is connected to the control host for communication, and when the client publishes information, the control host is connected to the external device for communication, and the control host sends a display command to the external device for information display; The control host includes an interface layer, a business layer and a data layer; The interface layer includes a real-time traffic condition display module, an emergency information release module, a planned event information release module, a predicted travel time release module, a traffic warning information release module and a traffic facility location display module; The business layer includes a real-time traffic condition publishing module, an emergency information publishing module, a system equipment location display module, and a construction information display module; The data layer includes real-time road condition information, traffic management information, traffic event information, traffic flow status prediction, traffic facility information and warning information; Before issuing warning information, the traffic warning information release module needs to determine the percentage of advance and lag between the warning time scale and the sending time of the warning information to determine the timeliness of the warning information release. The specific relationship formula for establishing the warning information release and dissemination timeliness model is: ; In the formula, S is the timeliness of the warning during this period, n is the number of field equipment, T is the warning time scale, The time when the warning information is sent. is the arrival time of the warning information; The traffic warning information release module determines the probability of event information and releases information when the probability of an event exceeds the preset value. Suppose the independent variable affecting event y is , the probability of taking the value 1 is , then the probability of taking the value as 0 is , the probability function of the regression model is: ； Where, is a constant term, is the partial regression coefficient of the regression model; When the business layer publishes information, it is necessary to evaluate the publishing index weight of the event. The specific steps are as follows: Step 1: Road emergency information release evaluation index system, constructing a pairwise comparison interval number index judgment matrix ; Step 2: Calculate the normalized interval weight vectors of the first-level and second-level indicators using the nonlinear programming model ; Step 3: According to the hierarchical affiliation of the indicators, calculate the weight vector of the combined interval number of each secondary indicator for the evaluation target ; Step 4: Calculate the possibility of the size of the interval number, construct the possibility judgment matrix M, calculate the sorting weight vector of the possibility judgment matrix M, and sort the indicators according to the size of their components; The matrix M is defined as follows: ; Then calculate the sorting weight vector ; ； Obtain the sorting weight vector Finally, the indicators are sorted and reported according to their size.

2. A road broadcast real-time traffic information release system according to claim 1, characterized in that: The control host adopts a high-availability cluster architecture; the control host is composed of multiple servers. When a server fails, the system automatically switches to another non-faulty server.

3. A road broadcast real-time traffic information release system according to claim 1, characterized in that: When the control host sends a display command to the external device, it needs to call the encryption interface to digitally sign and encrypt the information to be sent. The private key of the algorithm is , the public key is , the specific encryption process is as follows: Step S1: Use The algorithm generates a summary of the original display command information; Step S2: The control host sends the private key pass The data signature algorithm encrypts the summary and generates a digital signature; Step S3: Use Algorithm key Encrypt the digital signature and original display command information to generate ciphertext ; Step S4: External device public key pass Public key encryption algorithm Encrypt and generate key ciphertext; Step S5: Send the information ciphertext and key ciphertext to the external device.

4. A road broadcast real-time traffic information release system according to claim 3, characterized in that: The external device receives the information ciphertext and the key ciphertext and decrypts it. The private key of the algorithm is , the public key is , The algorithm key is The specific decryption process is as follows: Step J1: Field equipment The private key of the algorithm Decrypt the key ciphertext and get Algorithm key ; Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature; Step J3: Used to control the host Public key of the algorithm , get the initial summary; Step J4: Use The algorithm generates a summary of the plaintext message; Step J5: Compare the plaintext summary with the initial summary to see if they are consistent. If they are consistent, the obtained plaintext summary is the original information and is played and displayed; If they are inconsistent, the information is illegal, the information playback is terminated and an alarm is generated.

5. A road broadcast real-time traffic information release system according to claim 1, characterized in that: The real-time traffic condition display module is used to collect traffic information in real time according to road equipment, and display the road condition information in real time based on the GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic maps, and uses red, yellow and green colors to represent the three traffic states of road congestion, slowness and smoothness respectively.

6. A road broadcast real-time traffic information release system according to claim 1, characterized in that: The predicted travel time publishing module integrates traffic flow data, speed and road occupancy into road condition information, traffic control information, historical travel information, traffic flow status prediction information, and event information through traffic information fusion processing and analysis, and combines it with the electronic road network map of the lane-level GIS to realize the publication of road predicted communication time.

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