Research on application scenario of vehicle road collaboration for bus operation management

Love is parallel to the world 2021-08-08 15:18:52 阅读数:13

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research application scenario vehicle road

 

Research on application scenario of vehicle road collaboration for public transport operation management

 

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 .

( One ) Intelligent network vehicle road coordination public service platform

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 .

( Two ) Bus road collaborative application demonstration

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 .

ZNWL202003025_01100

Two 、 Main application scenarios

( One ) Road traffic signal data application scenario

1. Traffic signal phase reminder

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 .

2. Intelligent guidance of bus speed

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 .

3. Bus signals have priority

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 .

( Two ) Application scenario of traffic environment data for safe driving

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 .

1. Pedestrian detection and safety warning

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 .

2. Vehicle detection and anti-collision warning

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

3. Bridge and tunnel flooding monitoring and risk early 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 .

( 3、 ... and ) Bus operation management data linkage application scenario

1. Bus entrance and exit station linkage management

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 .

2. Platform berth guidance and information service

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 .

3. Bus operation dispatching and auxiliary safety

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 .

( Four ) Application scenario of digital traffic signs and markings

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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