City expressway access ramp vehicle pass guiding system in car networking environment and guiding method thereof

Abstract

The present invention discloses a city expressway access ramp vehicle pass guiding system in car networking environment and a guiding method thereof. The system comprises a roadside device, a monitoring center, the vehicle device of a main line vehicle and the vehicle device of a ramp vehicle; the roadside device includes main line traffic stream information collection module, a ramp traffic stream information collection module and a roadside intelligent decision module; the vehicle device of the main line vehicle and the vehicle device of the ramp vehicle respectively include vehicle master control modules, vehicle basic information storage module, GPS location modules, vehicle speed collection modules, vehicle speed control modules and prompting modules; the conflict prediction estimation is performed through the operation station information of the near-side lane vehicle of the roadside device collection main line and the ramp vehicle to give out the grouping condition of the access ramp vehicle and the safety vehicle speed required by importing the main line traffic flow and send the grouping condition and the safety vehicle speed to the prompting module and the vehicle speed control module in the vehicle device. The city expressway access ramp vehicle pass guiding system in car networking environment and the guiding method thereof can avoid the vehicle collision of an express way confluence zone and improve the driving safety and the pass efficiency.

Description

technical field [0001] The invention relates to vehicle-road coordination and safety control technology in an intelligent transportation system, in particular to a vehicle traffic guidance system and a guidance method for urban expressway entrance ramps in a vehicle networking environment. Background technique [0002] With the rapid increase of car ownership, traffic conflicts and congestion in the confluence area of ​​urban expressways are becoming more and more serious, which has become one of the main reasons for the weakening of efficient and fast operation efficiency of expressways. Especially in the morning and evening rush hours characterized by commuting to school, the congestion in the merge area not only leads to the failure of the main line traffic flow of the expressway, but also causes supersaturated flow on the entrance ramp, which affects the effective operation of the surface road traffic system. It can be seen that preventing traffic congestion in the merge...

AI Technical Summary

Problems solved by technology

[0004] By retrieving existing patents, it can be seen that the existing patents are mainly aimed at the guidance control system and method of the highway entrance ramp merge area. For example, Chinese patent application No. Inbound guidance controller and intelligent on-board equipment, the roadside inbound guidance controller is used to receive the real-time status information of vehicles within a certain distance from the upstream of the ramp and the main road to the end of the merge area, and form real-time guidance information for each vehicle. The on-board equipment merges into the main road traffic flow according to the received guidance information. This method greatly improves the safety when a single ramp vehicle in the merge area merges into the main road. However, this method guides the ramp vehicles to merge one by one, and the efficiency of the merge It is relatively low, and does not take into account the inbound scheme of ramp vehicles in the form of convoys; Chinese Patent Application No. 201510639084.8 discloses a method of safety coordinated control of expressway merge areas based on vehicle-to-vehicle communication technology. This method uses vehicle-to-vehicle communication technology to collect and Transmit information such as the position and speed of vehicles near the merge area, calculate and predict the safety conflicts and interferences that may be caused by the main road and ramp vehicles arriving in the merge area, and use the control and coordination method to warn drivers in advance, adjust vehicle driving behavior, and reduce safety conflicts and disturbances. The probability of congestion, but this method cannot clearly give the speed guidance when the vehicles meet, but only warns the safety of vehicles

[0005] Most of the currently public on-ramp vehicle guidance systems are aimed at the safety of on-ramp vehicles merging with mainline vehicles, without considering the efficiency of merging, and the merging area of ​​urban expressways cannot be used reasonably, let alone fundamentally. To solve the problem of traffic congestion in the merge area of ​​urban expressways, it is difficult to achieve a safe and efficient merge in the true sense

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