Love is parallel to the world 2021-08-08 15:18:52 阅读数:13
Research on application scenario of vehicle road collaboration for public transport operation management One 、 The overall framework
The overall framework is composed of intelligent network vehicle road collaborative public service platform and bus road collaborative application demonstration .
The intelligent network vehicle road coordination public service platform mainly includes vehicle road coordination roadside facilities 、 Vehicle road cooperation vehicle unit and decision control cloud platform .
among , The vehicle road coordination roadside facilities mainly include the following units （RSU)、 Networking transformation of traffic roadside facilities ; Vehicle road coordination on-board unit （OBU, Front loading is also called T-Box) It mainly includes communication chip 、 Communication module 、 Terminal equipment 、V2X The agreement cannot be found V2X Application software ; Decision controlled high-precision map ）、 State management and data interaction of on-board unit set at roadside 、 Information exchange between traffic management platforms 、 Collaborative perception management of road traffic environment 、 Management of driving safety cooperative control strategy 、 Collaborative management strategy of traffic operation efficiency 、 Traffic information services , It is composed of open management, etc , For intelligent networked vehicles 、C-V2X infrastructure 、 Communication network 、 Provide platform side services for traffic operation command , Realize the global control and operation status monitoring of vehicle road coordination ; In this part, the intranet operator is responsible for the operation , It mainly includes the maintenance of abutment and roadside facilities 、 Business operation service and customer service .
The bus road collaborative application demonstration mainly uses the low delay communication capability provided by the intelligent network vehicle road collaborative public service platform 、 terminal - edge - Area - Multi level distributed control of the center V2X Computing power and road traffic network data , Improve bus safety .
It mainly includes traffic signal phase reminder 、 Bus speed intelligent guidance 、 Bus signals have priority 、 Pedestrian detection and safety warning 、 Vehicle detection and anti-collision warning 、 Bridge and tunnel flood monitoring alarm 、 The bus goes in and out of the station 、 Bus operation management and auxiliary safety 、 Ten scenarios such as the application of digital traffic signs and markings .
The construction content of this part is usually maintained and used by the vehicle operation unit .
Two 、 Main application scenarios
Traffic signal phase reminder is a safety measure for auxiliary driving , The phase reminder object includes the current vehicle driver 、 Follow the driver .
The vehicle receives the traffic light status information from the roadside equipment , It is displayed on the bus central control and rear report screen , So as to reduce traffic safety hazards .
It mainly solves the following safety problems ： When there is a medium in front of a small motor vehicle 、 Large vehicles block the line of sight, so they can't see the traffic lights clearly and run the red light by mistake ; When the visibility of the traffic environment is low , The owner of the car can't see clearly , Cause the owner to run through the yellow light or run through the red light too fast in front of the signal light , Or rear end collision due to sudden braking ; Autonomous vehicles depend on , If the ambient visibility is low , Misreading signal lamp , Cause autonomous vehicles to run red lights .
Intelligent guidance of bus speed as a measure of traffic efficiency , Intelligent guidance includes road speed 、 Green wave speed , It can reduce bus delays and parking times , Improve the operation efficiency of public transport vehicles , It also has the purpose of promoting drainage .
The vehicle receives the traffic light status sent by the equipment 、 Cycle and countdown information , Without changing the traffic signal control scheme , According to the current vehicle speed 、 Location 、 Signal phase remaining time , Relying on the collaborative calculation of a cloud on one side of the platform, the driver is advised to provide the speed prompt information after dynamic element optimization , On the premise of ensuring no impact on roads and other social vehicles , Realize bus stop at the station , After loading and unloading and starting “ Lv Bo “ Through the intersection . In case of emergency, the owner can be reminded by alarm sound signal , Avoid traffic safety violations , Greatly reduce the probability of accidents .
Bus signal priority is a traffic efficiency measure , It can improve the traffic efficiency of bus traffic lights .
When a bus passes a signalized intersection , Information between the vehicle and the roadside system occurs automatically , Identify the requesting vehicle as the vehicle requiring priority through the sending system , Right of way authorization , Phase trigger the intersection signal “ Signal priority ” intervention , The signal priority strategy mainly adopts the extension of red light and green light , Ensure that the main vehicle express system recognizes that when the bus passes through the intersection , The end of priority traffic information will be automatically sent to the roadside system , The intersection signal control scheme returns to the normal state .
Use roadside mounted cameras 、 Millimeter wave radar 、 Laser radar 、 Traffic environment data identified by sensors such as environmental sensors , Passing roadside RSU Interact with the vehicle , Remind the driver to drive safely , Mainly for auxiliary driving safety measures .
Roadside camera 、 Millimeter wave radar 、 The lidar identified a pedestrian 、 Targets such as non motor vehicles break into the driveway , When there is a risk of collision , Send safety warning information to roadside equipment .
Roadside equipment will pre the vehicle in real time , Remind the driver of the risk of collision , It is recommended to slow down and avoid , Effectively avoid traffic accidents . Roadside facilities are mainly deployed at the school gate 、 Pedestrian crossing places such as business center .
There may be visual blind spots when the bus is running , Roadside Facilities depend on vehicle location 、 Speed 、 Direction 、 Calculate whether there is possibility of collision with acceleration and other information , Send collision risk and safe overtaking information to the equipment , Lower the vehicle gear, etc ） Or driving inattention 、 Risk of accidents caused by driver's error in distance and speed estimation .
Roadside facilities are mainly deployed at the curve of the access road of the expressway , A bend or entrance to a road traffic hub , Complex traffic , Places with high incidence and high risk of traffic accidents, such as abnormal follow-up distance and collision warning
The roadside water intrusion sensor monitors the abnormal wading condition of bridge and tunnel sections , Send abnormal data safety warning information to roadside equipment , The early warning information will be sent through in real time V2X Radio alert , And further sent to the management background , Managed by , And further send the weather , To the corresponding roadside equipment , To remind the drivers of vehicles in the corresponding road section to drive carefully .
When the bus enters and exits the entrance and exit of the parking lot , Communicate with on-board equipment through roadside equipment arranged at the entrance and exit , The background automatically records the details of the vehicle , Like the driver 、 The vehicle number 、 Planned departure time , To judge whether the bus has access authority , After meeting the access authority , Automatic control of entrance and exit gate release .
When the bus is a certain distance from the platform , The vehicle shall actively initiate the interaction with the platform roadside equipment , Sense the real-time position and running speed of the bus , The arrival time is predicted through edge calculation , According to the occupation of the station at this time , Set and send to the on-board terminal for the vehicle about to enter the station , meanwhile , The background will present the relevant berth information on the platform electronic display screen in advance , Or broadcast reminders , So that passengers can be prepared in advance .
After the vehicle enters the station, stop according to the instructions of the equipment , To avoid entering the station “ Run after the car ” The situation of , Optimize passenger boarding process , Avoid platform congestion .
By car OBU Display the vehicle road coordination data on the central control screen inside the bus , So that the driver can obtain the roadside pedestrian detection in real time during driving 、 Vehicle detection 、 Bridge and tunnel flooding 、 standing 、 In terms of signal light coordination, intelligent network can assist safe driving , Enhance vehicle safety perception , Greatly reduce the driver's working intensity , Effectively prevent the occurrence of safety events .
Through the background of dispatching system , Intuitively understand the overview of line vehicle road coordination , Including body data 、 Distribution of roadside equipment 、 Uplink and downlink traffic 、 Real time interactive data of vehicle road coordination （ Signal lamp status 、 At the time of safety warning, the situation of all networked vehicles ( Such as the place and time when the active safety alarm is triggered ） Make a comprehensive display , Facilitate the operation and dispatching management of vehicles .
The application scenarios of digital traffic signs and markings include static digital traffic signs and markings and dynamic digital traffic signs and markings , It is mainly to better express the highway traffic prohibition to public transport vehicles 、 Limit 、 Compliance and traffic information , The information carried by the existing traffic signs and markings , And the proprietary information required for autonomous bus driving through digital traffic signs 、 It is released to public transport vehicles by means of variable information board , Remind the driver to travel safely . Typical applications include couplers , Digital tide is the lane 、 Flexible management of bus lane, etc .
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