Roundabout traffic signal real-time control system and control method
By monitoring and analyzing roundabout traffic data in real time and dynamically adjusting traffic light control, the problems of abnormal traffic flow and time-period differences in the roundabout traffic system have been solved, enabling real-time traffic guidance and early warning, and improving the efficiency of traffic management and the rationality of vehicle route selection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-23
- Publication Date
- 2026-03-31
AI Technical Summary
The existing roundabout traffic signal control system cannot respond to abnormal traffic flow in real time, resulting in frequent congestion during peak hours. It also fails to effectively handle the differences in traffic flow in each time period and ignores the differences in traffic flow at different times.
A real-time traffic signal control system for a roundabout was designed. The system acquires and analyzes historical peak levels through a historical data processing module, and dynamically adjusts traffic light control in conjunction with real-time traffic flow monitoring. The system includes a traffic light control module, a vehicle hazard assessment module, and an in-vehicle electronic map to achieve real-time traffic guidance and early warning.
It enables priority passage through intersections with high traffic volume in each time period, timely handling of abnormal traffic flow, avoidance of congestion, and enhances the real-time and predictability of traffic management, prompting vehicles to choose reasonable routes.
Smart Images
Figure CN117392860B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of roundabout traffic control technology, specifically to a real-time traffic signal control system and control method for roundabouts. Background Technology
[0002] Roundabouts are traffic aids designed to alleviate congestion at intersections or multiple intersections. Their unique structure and single-direction guidance facilitate traffic flow and reduce conflict points caused by intersecting traffic. However, with the increasing number of vehicles, roundabouts often become severe congestion points during peak traffic hours in practice. Therefore, research on roundabout traffic control is of great significance.
[0003] Currently, roundabout traffic signals generally rely on current traffic flow for timely control, but when actual congestion occurs, traffic control can only alleviate the problem. Furthermore, peak hours are typically only considered during the morning and evening rush hours, neglecting the potential for varying traffic flow at different intersections within a given timeframe. Additionally, how to promptly identify and address abnormal traffic flow patterns in real time is also a problem that needs to be solved.
[0004] Based on this, the present invention designs a real-time traffic signal control system and control method for roundabouts to solve the above problems. Summary of the Invention
[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a real-time control system and control method for roundabout traffic signals.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A real-time traffic signal control system for a roundabout, comprising:
[0008] The historical data processing module is used to acquire historical traffic data of the roundabout, then process and analyze the historical data to obtain historical peak level classifications; and transmit the data to the roundabout traffic control server, which controls the lighting sequence of the traffic lights based on the historical peak level classifications.
[0009] The intersection traffic flow monitoring module is used to monitor the inbound and outbound traffic flow data at each intersection of the roundabout in real time and transmit the data to the roundabout traffic control server. The roundabout traffic control server compares the inbound traffic flow with the historical average inbound traffic flow Q for the same time period. nThe process involves several steps: First, determine if the difference exceeds 40%. If so, determine if the historical peak traffic level corresponding to the intersection is at the highest priority. If so, extend the lighting time of the traffic light control module. Otherwise, advance the historical peak traffic level corresponding to the intersection to the highest priority to obtain the updated peak traffic level. If the difference does not exceed 40%, continue to determine if the difference exceeds 20%. If so, advance the historical peak traffic level corresponding to the intersection by one level. Otherwise, determine if the traffic flow data of the current intersection is normal.
[0010] The intelligent vehicle data acquisition module communicates with the vehicle's infotainment system to retrieve information from the system and transmits it to the vehicle hazard assessment module.
[0011] The vehicle hazard assessment module is used to calculate the hazard score of intelligent vehicles based on the information from the intelligent vehicle data acquisition module, and to calculate the total hazard score of each intersection in real time and send it to the vehicle terminal.
[0012] The vehicle-mounted electronic map, built into the vehicle's infotainment system, is used to display the current congestion situation at each intersection and roundabout in real time, as well as the total hazard score and total impact factor score of each intersection in real time.
[0013] The exit traffic slowness impact factor statistics module is used to count the impact factors of slow traffic at each intersection in real time, and to count the total impact factor score of each intersection in real time and send it to the vehicle terminal.
[0014] The traffic light control module includes a controller and traffic lights. The controller is connected to the roundabout traffic control server. Under normal conditions, the controller controls the traffic lights to turn on in sequence and for how long, according to the historical peak traffic levels.
[0015] If the total traffic flow in the roundabout exceeds P, the controller will turn the traffic lights red to prohibit passage until the total traffic flow in the roundabout is less than P, at which point the controller will restore the traffic lights to normal.
[0016] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n When the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is at the highest priority, the controller will extend the lighting time of the traffic lights.
[0017] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is not at the highest priority, the historical peak traffic level corresponding to the intersection will be moved to the highest priority, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level order.
[0018] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 20% but is less than 40%, the historical peak traffic level corresponding to the intersection will be advanced by one level, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level.
[0019] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n Once the peak traffic volume does not exceed 20% and the historical peak traffic level is restored, the controller will control the traffic lights to turn on and maintain the order of the historical peak traffic level.
[0020] And the roundabout traffic control service terminal.
[0021] Furthermore, the steps for processing and analyzing historical data include:
[0022] (1) Divide the day into 24 time periods in hours, and count the traffic flow in the island and the traffic flow entering each intersection in each time period;
[0023] (2) Calculate the historical average inbound traffic volume Q at each intersection in each time period. n The formula is:
[0024] Q n =Total inbound traffic volume at the intersection in each time period / Total number of vehicles in that time period;
[0025] Where n represents the number of intersections;
[0026] (3) Calculate the maximum traffic flow P through the roundabout;
[0027] (4) In each time period, Q1~Q n Sort the data from largest to smallest, and then convert this sorting into the corresponding intersection sorting. This yields the historical peak level for each time period, with intersections ranked higher in the historical peak level having priority.
[0028] Furthermore, historical data includes time information, inbound and outbound traffic flow at each intersection of the roundabout, and congestion conditions.
[0029] Furthermore, the vehicle-mounted information includes real-time location, driving speed, abnormal driving habits, tire pressure, destination, and driver status information.
[0030] Furthermore, the intelligent vehicle data acquisition module transmits information to the roundabout traffic control server in real time. For vehicles that have not yet entered the roundabout but whose destination requires passing through the roundabout, the roundabout traffic control server merges and calculates the estimated traffic flow data at each time point in real time, and determines whether it exceeds the maximum traffic flow P of the roundabout. If it does, it sends the data to the vehicle's infotainment system.
[0031] Furthermore, factors contributing to slow traffic at exits include: school zones during school hours, bus stops, significant weaving with other road sections, a large number of non-motorized vehicles, limited parking capacity leading to heavy parking pressure, road sections where pedestrians and vehicles are not separated, and high overall hazard scores at intersections.
[0032] Furthermore, the total impact factor score for each intersection is the sum of the number of impact factors related to slow exit traffic.
[0033] Furthermore, it also includes a data update module, which transmits the latest traffic data of the roundabout to the historical data processing module in real time. The historical data processing module processes and analyzes the historical data to obtain the latest historical peak level and transmits it to the roundabout traffic control server.
[0034] A control method for a real-time traffic signal control system for a roundabout includes the following steps:
[0035] 1. Historical traffic data of the roundabout is obtained through the historical data processing module, including time information, traffic flow entering and exiting at each intersection of the roundabout, and congestion conditions. The historical data is then processed and analyzed to obtain historical peak levels. The data is then transmitted to the roundabout traffic control server, which controls the lighting sequence of the traffic lights according to the historical peak levels.
[0036] 2. The intelligent vehicle data acquisition module communicates with the vehicle terminal to retrieve information from the vehicle terminal and transmits the information to the vehicle hazard scoring module. The vehicle hazard scoring module calculates the hazard score of the intelligent vehicle based on the information from the intelligent vehicle data acquisition module, and calculates the total hazard score of each intersection in real time and sends it to the vehicle terminal.
[0037] The system uses the exit traffic slowness impact factor statistics module to count the impact factors of slow traffic at each intersection in real time, and to count the total impact factor score of each intersection in real time, which is then sent to the vehicle terminal. The total impact factor score of each intersection is the sum of the number of exit traffic slowness impact factors.
[0038] 3. The vehicle-mounted electronic map displays the current congestion situation at each intersection and roundabout in real time, as well as the total hazard score and total impact factor score of each intersection in real time.
[0039] 4. The traffic flow monitoring module at the intersection monitors the inbound and outbound traffic flow data at each intersection of the roundabout in real time and transmits the data to the roundabout traffic control service terminal.
[0040] Under normal circumstances, the controller controls the traffic lights to turn on in sequence and for how long, according to the historical peak traffic levels.
[0041] If the total traffic flow in the roundabout exceeds P, the controller will turn the traffic lights red to prohibit passage until the total traffic flow in the roundabout is less than P, at which point the controller will restore the traffic lights to normal.
[0042] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n When the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is at the highest priority, the controller will extend the lighting time of the traffic lights.
[0043] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is not at the highest priority, the historical peak traffic level corresponding to the intersection will be moved to the highest priority, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level order.
[0044] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 20% but is less than 40%, the historical peak traffic level corresponding to the intersection will be advanced by one level, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level.
[0045] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n Once the peak traffic volume does not exceed 20% and the historical peak traffic level is restored, the controller will control the traffic lights to turn on and maintain the order of the historical peak traffic level.
[0046] The intelligent vehicle data acquisition module transmits information to the roundabout traffic control server in real time. For vehicles that have not yet entered the roundabout but whose destination requires passing through the roundabout, the roundabout traffic control server merges and calculates the estimated traffic flow data at each time point in real time, and determines whether it exceeds the maximum traffic flow P of the roundabout. If it does, the data is sent to the vehicle's infotainment system.
[0047] Furthermore, step five involves transmitting the latest roundabout traffic data in real time to the historical data processing module via the data update module. The historical data processing module then processes and analyzes the historical data to obtain the latest historical peak level and transmits it to the roundabout traffic control server.
[0048] Beneficial effects
[0049] This invention takes into account that there may be differences in traffic flow at each intersection in each time period. By obtaining the historical peak level for each time period, it ensures that intersections with higher historical peak levels can be prioritized for passage and that passage time can be increased in each time period. This can play a role in traffic management in each time period and avoid the formation of congestion points.
[0050] When abnormal traffic flow occurs, the roundabout traffic control server will compare the incoming traffic flow with the historical average incoming traffic flow Q for the same time period. n By comparing and taking corresponding actions, traffic can be managed in a timely manner to prevent further congestion.
[0051] This invention can update the historical peak traffic levels in a timely manner, thereby dynamically obtaining the traffic situation around the island;
[0052] This invention can predict traffic flow data in advance and issue warnings to vehicle-mounted systems, indicating potential congestion or slow traffic, so that vehicles can change routes in a timely manner. Attached Figure Description
[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0054] Figure 1 This is a block diagram of a real-time traffic signal control system for a roundabout according to the present invention;
[0055] Figure 2 This is a flowchart of a real-time traffic signal control method for a roundabout according to the present invention. Detailed Implementation
[0056] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0057] The present invention will be further described below with reference to embodiments.
[0058] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.
[0059] Example 1
[0060] Please refer to the instruction manual appendix. Figure 1 A real-time traffic signal control system for a roundabout, comprising:
[0061] The historical data processing module is used to acquire historical traffic data of the roundabout, including time information, the inbound and outbound traffic flow at each intersection of the roundabout, and congestion conditions. The historical data is then processed and analyzed to obtain historical peak levels. The data is then transmitted to the roundabout traffic control server, which controls the lighting sequence of the traffic lights based on the historical peak levels.
[0062] Preferably, the steps for processing and analyzing historical data include:
[0063] (1) Divide the day into 24 time periods in hours, and count the traffic flow in the island and the traffic flow entering each intersection in each time period;
[0064] (2) Calculate the historical average inbound traffic volume Q at each intersection in each time period. n The formula is:
[0065] Q n =Total inbound traffic volume at the intersection in each time period / Total number of vehicles in that time period;
[0066] Where n represents the number of intersections;
[0067] Calculation example:
[0068] <![CDATA[Q n ]]> 0-1 time period ……. 23-24 time period Intersection 1 15 10 Intersection 2 30 15 Intersection 3 60 20 Intersection 4 25 3
[0069] (3) Calculate the maximum traffic flow P through the roundabout;
[0070] (4) In each time period, Q1~Q n Sort the data from largest to smallest, and convert this sorting into the corresponding intersection sorting. This yields the historical peak level for each time period, and the intersections with higher historical peak levels have priority.
[0071] This invention takes into account that there may be differences in traffic flow at each intersection in each time period. By obtaining the historical peak level for each time period, it ensures that intersections with higher historical peak levels can be prioritized for passage and that passage time can be increased in each time period. This can play a role in traffic management in each time period and avoid the formation of congestion points.
[0072] The intersection traffic flow monitoring module is used to monitor the inbound and outbound traffic flow data at each intersection of the roundabout in real time and transmit the data to the roundabout traffic control server. The roundabout traffic control server compares the inbound traffic flow with the historical average inbound traffic flow Q for the same time period. n The process involves several steps: First, determine if the difference exceeds 40%. If so, the traffic flow data is considered abnormal, and congestion is highly likely. Then, determine if the historical peak level corresponding to the intersection is at the highest priority. If so, extend the lighting time of the traffic light control module. Otherwise, advance the historical peak level corresponding to the intersection to the highest priority to obtain the updated peak level. If the difference does not exceed 40%, continue to determine if the difference exceeds 20%. If so, the current traffic flow data at the intersection is high, and congestion may occur. Then, advance the historical peak level corresponding to the intersection by one level. Otherwise, the current traffic flow data at the intersection is considered normal.
[0073] The intelligent vehicle data acquisition module communicates with the vehicle's infotainment system to retrieve information from the system, including real-time location, driving speed, abnormal driving habits, tire pressure, destination, and driver status; and transmits the information to the vehicle hazard assessment module.
[0074] The vehicle hazard assessment module is used to calculate the hazard score of intelligent vehicles based on information from the intelligent vehicle data acquisition module, and to calculate the total hazard score of each intersection in real time and send it to the vehicle terminal. The higher the hazard score, the higher the probability of a traffic accident occurring at this intersection. The module prompts the vehicle to drive cautiously or choose an intersection with a lower hazard score.
[0075] Rating example:
[0076] project Normal rating Abnormal scoring driving speed 0 Speeding, increase by 1 abnormal driving habits 0 For each additional abnormal driving habit, add 1 Tire pressure 0 For each additional vehicle with abnormal tire pressure, the penalty increases by 1. Driver status 0 For each additional abnormal driving condition such as fatigued driving or making a phone call, the penalty increases by 1.
[0077] The intelligent vehicle data acquisition module transmits information to the roundabout traffic control server in real time. For vehicles that have not yet entered the roundabout but whose destination requires passing through the roundabout, the roundabout traffic control server merges and calculates the estimated traffic flow data at each time point in real time and determines whether it exceeds the maximum traffic flow P of the roundabout. If it does, it sends a message to the vehicle's infotainment system to indicate that there may be congestion or slow traffic, so that the vehicle can change its route in time.
[0078] The vehicle-mounted electronic map, built into the vehicle's infotainment system, is used to display the current congestion situation at each intersection and roundabout in real time, as well as the total hazard score and total impact factor score of each intersection in real time, prompting vehicles to drive cautiously and choose intersections wisely.
[0079] The exit traffic slowness impact factor statistics module is used to count the impact factors of slow traffic at each intersection in real time, and to count the total impact factor score of each intersection in real time and send it to the vehicle terminal.
[0080] Factors affecting slow exit traffic include: school zones and school hours, bus stops, significant weaving with other road sections, a large number of non-motorized vehicles, limited parking capacity leading to high parking pressure, road sections where pedestrians and vehicles are not separated, high overall hazard scores at intersections, etc.; the total impact factor score for each intersection is the sum of the number of factors affecting slow exit traffic.
[0081] The higher the total impact factor score, the higher the probability of slow traffic at the exit of this intersection; it suggests that drivers should drive cautiously or choose an intersection with a lower total impact factor score to exit.
[0082] The traffic light control module includes a controller and traffic lights. The controller is connected to the roundabout traffic control server. Under normal conditions, the controller controls the traffic lights to turn on in sequence and for how long, according to the historical peak traffic levels.
[0083] If the total traffic flow in the roundabout exceeds P, the controller will turn the traffic lights red to prohibit passage until the total traffic flow in the roundabout is less than P, at which point the controller will restore the traffic lights to normal.
[0084] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n When the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is at the highest priority, the controller will extend the lighting time of the traffic lights.
[0085] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is not at the highest priority, the historical peak traffic level corresponding to the intersection will be moved to the highest priority, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level order.
[0086] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 20% but is less than 40%, the historical peak traffic level corresponding to the intersection will be advanced by one level, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level.
[0087] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... nOnce the peak traffic volume does not exceed 20% and the historical peak traffic level is restored, the controller will control the traffic lights to turn on and maintain the order of the historical peak traffic level.
[0088] When abnormal traffic flow occurs, the roundabout traffic control server will compare the incoming traffic flow with the historical average incoming traffic flow Q for the same time period. n By comparing and taking corresponding actions, traffic can be managed in a timely manner to prevent further congestion.
[0089] The data update module is used to transmit the latest traffic data of the roundabout to the historical data processing module in real time. The historical data processing module processes and analyzes the historical data to obtain the latest historical peak level and transmits it to the roundabout traffic control server.
[0090] This invention can update the historical peak traffic levels in a timely manner, thereby dynamically obtaining the traffic situation around the island;
[0091] And the roundabout traffic control service terminal.
[0092] Example 2
[0093] Please refer to the instruction manual appendix. Figure 2 A control method for a real-time traffic signal control system for a roundabout includes the following steps:
[0094] 1. Historical traffic data of the roundabout is obtained through the historical data processing module, including time information, traffic flow entering and exiting at each intersection of the roundabout, and congestion conditions. The historical data is then processed and analyzed to obtain historical peak levels. The data is then transmitted to the roundabout traffic control server, which controls the lighting sequence of the traffic lights according to the historical peak levels.
[0095] 2. The intelligent vehicle data acquisition module communicates with the vehicle's infotainment system to retrieve information, including real-time location, speed, abnormal driving habits, tire pressure, destination, and driver status. This information is then transmitted to the vehicle hazard assessment module. Based on the information from the intelligent vehicle data acquisition module, the vehicle hazard assessment module calculates the vehicle's hazard score and calculates the total hazard score for each intersection in real time, sending this data back to the vehicle's infotainment system. A higher hazard score indicates a higher probability of a traffic accident occurring at that intersection, prompting the driver to drive cautiously or choose an intersection with a lower hazard score.
[0096] The system uses a real-time exit traffic slowdown impact factor statistics module to calculate the impact factors of slow traffic at each intersection exit and to generate a total impact factor score for each intersection, which is then sent to the vehicle's infotainment system. These impact factors include: school zones during peak hours, bus stops, significant weaving with other road sections, a high number of non-motorized vehicles, limited parking capacity leading to heavy parking pressure, sections where pedestrians and vehicles are not separated, and high total hazard scores for the intersection, among others. The total impact factor score for each intersection is the sum of the number of impact factors affecting slow traffic at the exit. A higher total impact factor score indicates a higher probability of slow traffic at that intersection, prompting drivers to exercise caution or choose an intersection with a lower total impact factor score for exiting.
[0097] Third, the vehicle's electronic map displays the current congestion situation at each intersection and roundabout in real time, as well as the total hazard score and total impact factor score of each intersection, prompting vehicles to drive cautiously and choose intersections appropriately.
[0098] 4. The traffic flow monitoring module at the intersection monitors the inbound and outbound traffic flow data at each intersection of the roundabout in real time and transmits the data to the roundabout traffic control service terminal.
[0099] Under normal circumstances, the controller controls the traffic lights to turn on in sequence and for how long, according to the historical peak traffic levels.
[0100] If the total traffic flow in the roundabout exceeds P, the controller will turn the traffic lights red to prohibit passage until the total traffic flow in the roundabout is less than P, at which point the controller will restore the traffic lights to normal.
[0101] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n When the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is at the highest priority, the controller will extend the lighting time of the traffic lights.
[0102] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 40% and the historical peak traffic level corresponding to the intersection is not at the highest priority, the historical peak traffic level corresponding to the intersection will be moved to the highest priority, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level order.
[0103] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n If the peak traffic volume exceeds 20% but is less than 40%, the historical peak traffic level corresponding to the intersection will be advanced by one level, and the controller will control the traffic lights to turn on and the duration of the lights according to the updated peak traffic level.
[0104] If the real-time inbound traffic flow at the intersection is higher than the historical average inbound traffic flow Q for the same time period... n Once the peak traffic volume does not exceed 20% and the historical peak traffic level is restored, the controller will control the traffic lights to turn on and maintain the order of the historical peak traffic level.
[0105] Preferably, the intelligent vehicle data acquisition module transmits information to the roundabout traffic control service terminal in real time. For vehicles that have not yet entered the roundabout but whose destination requires passing through the roundabout, the roundabout traffic control service terminal merges and calculates the estimated traffic flow data at each time point in real time, and determines whether it exceeds the maximum traffic flow P of the roundabout. If it does, it sends a message to the vehicle's infotainment system to indicate that there may be congestion or slow traffic, so that the vehicle can change its route in time.
[0106] This invention can predict traffic flow data in advance and issue warnings to vehicle-mounted systems, indicating potential congestion or slow traffic, so that vehicles can change routes in a timely manner.
[0107] 5. The latest traffic data of the roundabout is transmitted in real time to the historical data processing module through the data update module. The historical data processing module processes and analyzes the historical data to obtain the latest historical peak level and transmits it to the roundabout traffic control server.
[0108] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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. Such modifications or substitutions will 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 roundabout traffic signal real-time control system, characterized by, Comprise: The historical data processing module is used for obtaining the historical data of roundabout traffic, and then processing and analyzing the historical data to obtain the historical peak classification; And transmit the data to the roundabout traffic control server, and the roundabout traffic control server controls the lighting sequence of the signal lamp control module according to the historical peak classification control signal; The intersection vehicle flow monitoring module is used for monitoring the entering vehicle flow and the exiting vehicle flow data of each intersection of the roundabout in real time and transmitting the data to the roundabout traffic control server; the roundabout traffic control server compares the entering vehicle flow with the historical average entering vehicle flow Q n If the difference exceeds 40%, it is determined whether the historical peak classification corresponding to the intersection is at the highest priority, if yes, the light time of the signal lamp control module is extended, otherwise the historical peak classification corresponding to the intersection is advanced to the highest priority, and the updated peak classification is obtained. If the difference does not exceed 40%, continue to judge whether the difference exceeds 20%, if yes, the historical peak classification corresponding to the intersection is advanced by one level, if not, the vehicle flow data of the current intersection is normal; The intelligent vehicle data acquisition module communicates with the vehicle terminal, and is used for calling the vehicle terminal information; and transmits the information to the vehicle danger score module; The vehicle danger score module is used for calculating the danger score of the intelligent vehicle according to the information of the intelligent vehicle data acquisition module, and real-time statistics of the total danger score of each intersection, and sends to the vehicle terminal; The vehicle terminal electronic map is built-in in the vehicle terminal, which is used for real-time display of the congestion situation in the current each intersection and roundabout, and real-time display of the total danger score of each intersection and the total influence factor score of each intersection; The exit slow traffic influence factor statistics module is used for real-time statistics of the influence factor of the exit slow traffic of each intersection, and real-time statistics of the total influence factor score of each intersection, and sending to the vehicle terminal; The signal lamp control module includes a controller and a signal lamp, and the controller is connected with the roundabout traffic control server; in normal state, the controller controls the lighting traffic sequence and the lighting length of the signal lamp according to the order of historical peak classification; If the total vehicle flow in the roundabout exceeds P, the controller controls the signal lamp to light red to prohibit traffic, until the total vehicle flow in the roundabout is less than P, the controller controls the signal lamp to return to normal state; If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n When the exceeding percentage is greater than 40% and the historical peak classification of the intersection is at the highest priority, the controller controls the light-on time of the signal light to be prolonged. If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n When the real-time entering vehicle flow of the intersection exceeds 40% and the historical peak classification corresponding to the intersection is not in the highest priority, the historical peak classification corresponding to the intersection is advanced to the highest priority, and the controller controls the lighting sequence and length of the traffic light according to the order of the updated peak classification. If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q n If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q And the roundabout traffic control server.
2. The roundabout traffic signal real-time control system of claim 1, wherein, The step of processing and analyzing the historical data comprises: (1) dividing a day into 24 time periods in units of hours, and counting the island vehicle flow and the entering vehicle flow of each intersection in each time period; (2) Calculate the historical average entering traffic flow Q of each intersection in each time period n ; the formula is: Q n = Total number of entering vehicles at the intersection per time period / Total number of vehicles in that time period; Wherein, n represents the number of intersections; (3) calculating the maximum vehicle flow P of the roundabout traffic; (4) In each time period, respectively, Q1~Q n Sort from large to small, and convert to the corresponding intersection order according to the sorting, that is, obtain the historical peak classification of each time period. The intersection with a high historical peak classification has the right of way.
3. The roundabout traffic signal real-time control system of claim 1, wherein, The historical data includes time information, the entering vehicle flow and the exiting vehicle flow of each intersection of the roundabout, and the congestion situation.
4. The roundabout traffic signal real-time control system of claim 1, wherein, The vehicle terminal information includes real-time position, driving speed, abnormal driving habit, tire pressure, driving destination, and driver state information.
5. The roundabout traffic signal real-time control system of claim 1, wherein, The intelligent vehicle data acquisition module transmits the information to the roundabout traffic control server in real time, for the vehicle which has not yet driven into the roundabout but needs to pass through the roundabout, the roundabout traffic control server calculates the expected vehicle flow data at each time point in real time, and judges whether it exceeds the maximum vehicle flow P of the roundabout traffic, if yes, it is sent to the vehicle.
6. The roundabout traffic signal real-time control system of claim 1, wherein, The exit slow traffic influence factor includes: school road section and school time period, bus stop, obvious interlacing with other sections, many non-motor vehicles, limited parking capacity leading to large parking pressure, road section without separation of people and vehicles, and high total danger score of intersection.
7. The roundabout traffic signal real-time control system of claim 6, wherein, The total influence factor score of each intersection is the sum of the number of exit slow traffic influence factors.
8. The roundabout traffic signal real-time control system of claim 6, wherein, The data updating module is further included for transmitting the latest roundabout traffic data to the historical data processing module in real time, and the latest historical peak classification is obtained by processing and analyzing the historical data through the historical data processing module and transmitted to the roundabout traffic control server.
9. A control method of the roundabout traffic signal real-time control system according to claim 8, characterized by, The method comprises the following steps: Step one: obtaining the historical data of the roundabout traffic through the historical data processing module, including time information, the entering and exiting traffic volume of each intersection of the roundabout, and congestion conditions, then processing and analyzing the historical data to obtain the historical peak classification, and transmitting the data to the roundabout traffic control server, and the roundabout traffic control server controls the light-on sequence of the signal light control module according to the historical peak classification control signal; Step two: communicating with the vehicle terminal through the intelligent vehicle data acquisition module, calling the information of the vehicle terminal, and transmitting the information to the vehicle danger score module; calculating the danger score of the intelligent vehicle through the vehicle danger score module according to the information of the intelligent vehicle data acquisition module, and real-time statistics of the total danger score of each intersection, and sending to the vehicle terminal; Step three: real-time display of the congestion conditions of each intersection and the roundabout through the vehicle electronic map, and real-time display of the total danger score of each intersection and the total influence factor score of each intersection; Step four: real-time monitoring of the entering and exiting traffic volume data of each intersection of the roundabout through the intersection traffic monitoring module, and transmitting the data to the roundabout traffic control server; In the normal state, the controller controls the light-on passing sequence and the light-on length of the signal light according to the order of the historical peak classification; If the total traffic volume in the roundabout exceeds P, the controller controls the signal light to turn red to prohibit passing until the total traffic volume in the roundabout is less than P, and the controller controls the signal light to return to the normal state; The intelligent vehicle data acquisition module transmits information to the roundabout traffic control server in real time, and for vehicles that have not yet traveled into the roundabout but need to pass through the roundabout, the roundabout traffic control server combines and calculates the expected traffic volume data at each time point in real time, and judges whether it exceeds the maximum traffic volume P of the roundabout, and if it exceeds, it is sent to the vehicle terminal. If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n When the exceeding percentage is greater than 40% and the historical peak classification corresponding to the intersection is at the highest priority, the controller controls the light-on time of the signal light to be prolonged. If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n When the real-time entering vehicle flow exceeds 40% and the historical peak classification of the intersection is not in the highest priority, the historical peak classification of the intersection is advanced to the highest priority, and the controller controls the lighting sequence and length of the traffic light according to the updated peak classification. If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q n If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q If the real-time entering vehicle flow of the intersection is greater than the corresponding historical average entering vehicle flow Q If the real-time entering vehicle flow of the intersection is greater than the historical average entering vehicle flow Q n If the real-time entering vehicle flow is not greater than the historical average entering vehicle flow Q and the historical peak classification is recovered, the controller controls the light-on passing order and the light-on length of the signal light according to the order of the historical peak classification. Step five: transmitting the latest roundabout traffic data to the historical data processing module through the data updating module, and obtaining the latest historical peak classification by processing and analyzing the historical data through the historical data processing module and transmitting it to the roundabout traffic control server.
10. The control method of the roundabout traffic signal real-time control system according to claim 9, characterized by,
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