Road broadcast real-time traffic information issuing system

Abstract

The invention discloses a road broadcast real-time traffic information issuing system, and relates to the technical field of urban traffic management. The system comprises external field equipment and a control center. The external field equipment communicates with the control center through an optical fiber 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 real-time road condition information of the road is collected, the collected data is analyzed and processed, the current road information is judged, the published information is generated, and the control host sends the display command to the external field equipment for display, so that the detection accuracy of the real-time road information is improved.

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 continuous growth of the domestic economy and the continuous increase in people's income, the number of motor vehicles has begun to rise rapidly, and the capacity of urban road traffic facilities has become increasingly insufficient. The structure and function of the road network are difficult to adapt to the current traffic needs, so that urban roads, especially those in large and medium-sized cities, are facing a new round of traffic congestion. Solving urban traffic conflicts must be addressed from many aspects, and intelligent transportation systems are an important way to improve traffic operation efficiency, improve traffic congestion, and facilitate people's travel.

[0003] At present, the main focus is on the collection and release of traffic information on urban expressways. There is little research on the detection and release of information on urban ground roads, and there is no practical application. There are significant differences between expressways and ground roads in the methods of traffic flow detection and information release: expressways are continuous traffic flows, and the average speed of the road section can be detected by a coil detector with relatively high accuracy. The travel time of the road section can also be obtained by processing the data collected by the coil detector. When publishing, the average speed or travel time can be divided into different levels for congestion and smoothness; while ground roads are intermittent traffic flows, and there are many factors that affect traffic congestion, such as traffic lights, illegal parking, traffic accidents, pedestrians and bicycles not complying with traffic rules, etc. Therefore, traffic detection and release on ground roads become relatively difficult, and the accuracy of detection 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. The invention obtains real-time traffic information through the road traffic condition monitoring system, and after being processed by the traffic monitoring management center, 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 the road traffic monitoring system, and the traffic conditions are collected by the monitor for publication. The accuracy of traffic data obtained by this method is low, and the data obtained by manual monitoring is difficult to meet the requirements for publication, and the data is not suitable for multiple forms of publication.

[0005] National patent CN1967622A discloses a system for predicting urban road traffic flow and guiding traffic information, which consists of a traffic information collection subsystem, a communication subsystem, a traffic information comprehensive processing platform, a traffic information release subsystem and a closed-circuit television monitoring subsystem. The traffic information release subsystem directly sends real-time traffic information to the traffic scene facing the vehicle. The patent does not clearly indicate whether the method is applicable to urban expressways or ground roads, but since the main means of the traffic information collection equipment in the patent is a coil detector, it is not applicable to the release of traffic information on ground 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] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a road broadcast real-time traffic information release system, including field equipment and a control center. 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 lamp, a traffic signal lamp, 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 equipment for communication, and the control host sends a display command to the external equipment 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 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.

[0008] Among them, the client is the software provided to users, including map display, program management, induction screen management, user management, system management and other modules. 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 the content published on the LED induction screen. Induction screen management supports adding and deleting induction screens; supports marking the location of induction screens on maps; supports the modification of basic information of induction screens. Supports the control of induction screens, and can control the power switch and screen brightness of induction screens. Provides the induction screen status viewing function, users can see the screen temperature, display brightness, whether the power is on, whether the communication is normal, and other information of the induction screen. User management supports the user's addition, deletion and modification functions, and supports user authority control. System management supports the recording of logs for all user operations in the system. All logs cannot be deleted once recorded, and provides log viewing functions.

[0009] The control center also includes multiple service modules such as the central communication module, unified service interface, synthetic publishing service, display communication service, fault detection service, HA cluster service, etc. The central 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 communication service: responsible for communication with the industrial computer of the field display screen. Fault detection service: responsible for regular detection of the status of all field 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.

[0010] 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.

[0011] As a preferred technical solution, 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 The key of the algorithm 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.

[0012] As a preferred technical solution, the external field device receives the information ciphertext and the key ciphertext for decryption. The private key of the algorithm is , the public 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 The key of the algorithm ; Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature; Step J3: Used to control the host The 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.

[0013] As a preferred technical solution, before issuing the warning information, the traffic warning information release module needs to determine the advance and lag percentage of the warning time scale from 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 propagation 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. The arrival time of the warning information.

[0014] 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 GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic map, and uses red, yellow and green colors to represent the three traffic conditions of road congestion, slowness and smoothness respectively.

[0015] 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, event information through traffic information fusion processing and analysis, and combines the electronic road network map of lane-level GIS to realize the release of road prediction communication time.

[0016] 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.

[0017] Traffic information notice board: set up a notice board on the website interface to cyclically prompt the latest traffic brief information. Click on a piece of information and the system will automatically locate it on the electronic map. The notice information includes: traffic accidents, congested sections, construction repairs, bad weather, group activities and other sudden traffic incidents.

[0018] GIS electronic map display: When the map is enlarged to a certain scale, the GIS map can display accident, congestion, construction repair, bad weather, group activities and other sudden traffic incident information through intuitive icons. Users can view specific traffic incident information by clicking the corresponding icon.

[0019] As a preferred technical solution, the traffic warning information release module judges the probability of event information occurrence, and releases information when the probability of an event occurrence exceeds a preset value. Assume that 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: ; In the formula, is a constant term, is the partial regression coefficient of the regression model.

[0020] As a preferred technical solution, when the business layer releases information, it is necessary to evaluate the release index weight of the event. The specific steps are as follows: Step 1: Road emergency information release evaluation index system, construct a pairwise comparison interval number index judgment matrix ; Step 2: Calculate the normalized interval number weight vectors of the primary and secondary 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.

[0021] As a preferred technical solution, the matrix M is defined as follows: ; Then calculate the sorting weight vector ; ; Get the sorting weight vector Finally, the indicators are sorted and reported according to their size.

[0022] The present invention has the following beneficial effects: 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.

[0023] The present invention encrypts the display command sent by the control host, and the external field device decrypts it for display, thereby improving the authenticity and security level of the display command transmission, and avoiding the external field device caused by the mistransmission of the message; 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 the efficiency of information broadcasting.

[0024] The present invention evaluates the weight of publishing indexes for display commands sent by the control host. When multiple messages need to be broadcast simultaneously, the index 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.

[0025] 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

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. 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.

[0027] Figure 1The present invention is a schematic diagram of the structure of a road broadcast real-time traffic information publishing system. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] 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.

[0030] In order to make the purpose, technical solution and advantages of this application clearer, the following Figure 1 The implementation methods of the present application are described in further detail.

[0031] Before introducing the embodiments of the present application, the traffic information publishing system is first described.

[0032] Traffic information release system refers to a traffic control method that provides actual road operation status to traffic participants through certain information dissemination media, reminds, suggests or controls traffic participants to choose the best walking route, and avoids and reduces travel delays and losses. From a macro perspective, by reasonably inducing traffic flow, it can optimize the distribution of traffic flow in the entire road network and improve the operation efficiency of the road network. At present, the mainstream traffic information release methods mainly include the Internet, mobile terminals, outdoor traffic guidance signs, traffic broadcasts, etc.

[0033] Features include: General information release: It can display general traffic information, such as traffic regulations, propaganda slogans, etc. According to the set display time, multiple pieces of information are played in turn. The information content and display time can be changed through the system.

[0034] Manual information release: weather conditions, traffic control information, road construction information and other information are manually sent to outdoor guidance signs for display. It can be set to display immediately after sending or to send and display at a fixed time after setting.

[0035] 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.

[0036] 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 used to limit the present application.

[0037] 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. The external equipment communicates with the control center through an optical fiber network; the external equipment includes one or more of a traffic guidance screen, a traffic broadcast, a street lamp, a traffic signal lamp, 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 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; The control host includes an interface layer, a business layer, and a data layer; The interface layer includes a real-time traffic 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 real-time traffic condition publishing module, emergency information publishing module, system equipment location display module and construction information display module; The data layer includes real-time road condition information, traffic management information, traffic incident information, traffic flow status prediction, traffic facility information and warning information.

[0038] Among them, the client is the software provided to users, including map display, program management, induction screen management, user management, system management and other modules. 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 the content published on the LED induction screen. Induction screen management supports adding and deleting induction screens; supports marking the location of induction screens on maps; supports the modification of basic information of induction screens. Supports the control of induction screens, and can control the power switch and screen brightness of induction screens. Provides the induction screen status viewing function, users can see the screen temperature, display brightness, whether the power is on, whether the communication is normal, and other information of the induction screen. User management supports the user's addition, deletion and modification functions, and supports user authority control. System management supports the recording of logs for all user operations in the system. All logs cannot be deleted once recorded, and provides log viewing functions.

[0039] The control center also includes multiple service modules such as the central communication module, unified service interface, synthetic publishing service, display communication service, fault detection service, HA cluster service, etc. The central 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 communication service: responsible for communication with the industrial computer of the field display screen. Fault detection service: responsible for regular detection of the status of all field 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.

[0040] 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.

[0041] 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: 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 The key of the algorithm 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.

[0042] The external device 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: Step J1: Field equipment The private key of the algorithm Decrypt the key ciphertext and get The key of the algorithm ; Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature; Step J3: Used to control the host The 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.

[0043] Before issuing warning information, the traffic warning information release module needs to determine the advance and lag percentage of the warning time scale from 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. The arrival time of the warning information.

[0044] 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 GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic map, and uses red, yellow and green colors to represent the three traffic conditions of road congestion, slowness and smoothness respectively.

[0045] 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, event information through traffic information fusion processing and analysis, and combines the electronic road network map of lane-level GIS to realize the release of road prediction communication time.

[0046] 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.

[0047] Traffic information notice board: set up a notice board on the website interface to cyclically prompt the latest traffic brief information. Click on a piece of information and the system will automatically locate it on the electronic map. The notice information includes: traffic accidents, congested sections, construction repairs, bad weather, group activities and other sudden traffic incidents.

[0048] GIS electronic map display: When the map is enlarged to a certain scale, the GIS map can display accident, congestion, construction repair, bad weather, group activities and other sudden traffic incident information through intuitive icons. Users can view specific traffic incident information by clicking the corresponding icon.

[0049] The traffic warning information release module judges the probability of event information occurrence 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: ; In the formula, is a constant term, is the partial regression coefficient of the regression model; The traffic warning information release module integrates traffic information fusion processing and analysis of traffic flow data, speed, road occupancy rate and other data, integrates road condition information, traffic control information, historical travel time, traffic flow state prediction information, event information, and combines the electronic road network map based on lane-level GIS to realize the release of predicted travel time for main roads such as trunk roads 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, comparison time and other contents.

[0050] 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. A. Traffic information announcement list: Road maintenance and reconstruction information release: Website users can view the road maintenance and reconstruction construction status on the map. The system provides a list of maintenance and reconstruction plans within a specified time period for users to view. Click on a piece of information and the system will automatically locate it on the electronic map. Users can search by road name to view the specific construction information of a certain road. Traffic control information release: Website users can view the latest traffic control information on the map. The system provides a list of traffic control information for users to view. Click on a piece of information and the system will automatically locate it on the electronic map. Users can search by road name to view the traffic control status of a certain road.

[0051] B. GIS electronic map display: When the map is enlarged to a certain scale, the information of planned traffic events such as current traffic control, construction, and rallies can be displayed on the GIS map through intuitive icons. Users can view specific traffic event information by clicking on the corresponding icon. When the business layer releases information, it is necessary to evaluate the release index weight of the event. The specific steps are as follows: Step 1: Road emergency information release evaluation index system, construct a pairwise comparison interval number index judgment matrix ; Step 2: Calculate the normalized interval number weight vectors of the primary and secondary 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. After sorting the information, broadcast the information with large components first, and then broadcast the information from large to small.

[0052] The matrix M is defined as follows: ; Then calculate the sorting weight vector ; ; Get the sorting weight vector Finally, the indicators are sorted and reported in descending order according to their size.

[0053] 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.

[0054] In addition, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiments can be completed by instructing related hardware through a program, and the corresponding program can be stored in a computer-readable storage medium.

[0055] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. 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 in that: 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 lamp, a traffic signal lamp, 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 equipment for communication, and the control host sends a display command to the external equipment 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 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.

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 The key of the algorithm 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 performs decryption. 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 The key of the algorithm ; Step J2: Use Decrypt the ciphertext to obtain the plaintext information and digital signature; Step J3: Used to control the host The 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: Before issuing the warning information, the traffic warning information release module needs to determine the advance and lag percentage of the warning time scale from 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 propagation 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. The arrival time of the warning information.

6. 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 GIS map. At the same time, it displays the real-time status of road traffic flow to users through electronic map, and uses red, yellow and green colors to represent the three traffic states of road congestion, slowness and smoothness respectively.

7. 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, event information through traffic information fusion processing and analysis, and combines the electronic road network map of lane-level GIS to realize the publication of road prediction communication time.

8. A road broadcast real-time traffic information release system according to claim 1, characterized in that: The traffic warning information release module determines the probability of event information occurrence and releases information when the probability of an event occurrence 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: ; In the formula, is a constant term, is the partial regression coefficient of the regression model.

9. A road broadcast real-time traffic information release system according to claim 1, characterized in that: When the business layer releases information, it is necessary to evaluate the release index weight of the event. The specific steps are as follows: Step 1: Road emergency information release evaluation index system, construct a pairwise comparison interval number index judgment matrix ; Step 2: Calculate the normalized interval number weight vectors of the primary and secondary 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.

10. A road broadcast real-time traffic information release system according to claim 9, characterized in that: The matrix M is defined as follows: ； Then calculate the sorting weight vector ; ； Get the sorting weight vector Finally, the indicators are sorted and reported according to their size.

Images