Highway confluence zone safety early-warning method based on vehicle-road cooperation

Abstract

The invention discloses a highway confluence zone safety early-warning method based on vehicle-road cooperation. The method is applied to roadside communication equipment and comprises the following steps: obtaining vehicle movement information, traffic flow status and traffic incident information regularly; predicting a driving track intersection point of a vehicle on a main lane and a vehicle ona ramp through an intersection point dynamic calculation model; according to the vehicle movement information and the driving track intersection point, calculating a collision coefficient; calculating comprehensive collision risk based on the vehicle movement information, the traffic flow status, the traffic incident information and the collision coefficient through a collision risk calculation model; if the comprehensive collision risk is larger than a threshold value, sending the comprehensive collision risk to vehicle-mounted communication equipment, wherein the vehicle-mounted communication equipment determines whether early warning is needed or not according to an early warning display and judgment model; and if the early warning is needed, providing corresponding early warning information through a vehicle-mounted terminal or a mobile terminal. The method can predict the collision risk of a highway confluence zone and take corresponding early warning measures, is high in early warning accuracy and effectively reduces accidents in the confluence zone.

Description

technical field [0001] The invention belongs to the field of intelligent networked traffic systems, and in particular relates to a safety warning method for a high-speed merge area based on vehicle-road coordination. Background technique [0002] The expressway merge area includes the on-ramp, the acceleration lane and the main lane of the expressway. The merging behavior of vehicles on the acceleration lane in the expressway merging area is likely to cause disorder in the traffic flow on the main road and even cause traffic accidents. According to statistics, traffic accidents on expressway ramps account for more than 30% of the total accidents every year. The research on regional security early warning is of great significance. [0003] The safety hazard analysis of the confluence area is as follows: [0004] Large trucks appear on the ramp: Overloaded and large cargo enters the main road at a slow speed, and even the highest speed cannot meet the speed requirements of t...

AI Technical Summary

Problems solved by technology

[0012] 1) Insufficient calculation accuracy:

[0013] First, the calculated interaction point is inaccurate: a fixed intersection point or a fixed starting point and focal point of the intersection area are used for collision TTC calculation, which deviates from the actual

[0014] Second, the early warning risk calculation is inaccurate: it only judges whether there is a collision risk based on TTC, without considering the current traffic status of the main road or ramp and whether there is a traffic incident

[0015] 2) The accuracy of the early warning is insufficient. There is no risk of collision but the vehicle within the communication range will also receive the early warning information, but it is not judged whether an early warning is required based on the actual position of the vehicle, which is prone to false alarms

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