Road traffic incident detection and early warning method and system based on vehicle-road coordination

Abstract

The invention discloses a road traffic event detection and early warning method based on vehicle-road coordination, comprising the following steps: 1) using a roadside unit arranged on one side of the road to collect the driving speed and GPS information of all passing vehicles within a preset period, At the same time, the geomagnetic traffic detector corresponding to the roadside unit is used to detect the sensed vehicle speed and road occupancy rate of passing vehicles, 2) calculate the average vehicle speed and average occupancy rate, when the average vehicle speed is less than the threshold speed and the average occupancy rate is greater than the threshold occupancy rate Determine the occurrence of traffic incidents, 3) Determine the cross-section positions of the dissipation area and the accumulation area, and carry out early warning or diversion of vehicles at the upstream position of the cross-section position of the accumulation area. Through the joint use of vehicle-mounted units, roadside units, and geomagnetic traffic detectors, not only macroscopic traffic flow parameters, but also individual vehicle operating information can be obtained, which enriches the information sources of traffic incident detection and improves the reliability of traffic incident detection. sex and accuracy.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a road traffic event detection and early warning method based on vehicle-road coordination and a detection and early warning system. Background technique [0002] In urban intelligent transportation systems, equipment such as fixed coils and geomagnetic traffic detectors are widely used in the collection of traffic parameters and the detection of traffic incidents. Chinese patent document CN104103171A discloses a double-section traffic incident detection method, which selects two sections of the road, obtains traffic parameters of the two sections, obtains clock drift rate, obtains data repair coefficient, and then improves the double-section traffic incident detection algorithm detection effect. [0003] In recent years, vehicle-road coordination technology has developed rapidly. The On Board Unit (OBU) installed on the vehicle and the Road Side Unit (RSU) in...

AI Technical Summary

Problems solved by technology

[0004] Equipment such as fixed coils and geomagnetic traffic detectors can only collect macroscopic traffic flow parameters, but cannot obtain individual vehicle operating information; in addition, the on-board unit can upload individual vehicle operating information to the roadside unit, but some macroscopic traffic Stream parameters are not easy to obtain

Therefore, a single fixed coil, geomagnetic traffic detector, or a single vehicle-mounted unit or roadside unit all face the problem of incomplete traffic information and the collection of traffic information is easily affected by external factors, which is not conducive to fully reflecting the operation of traffic flow and traffic incident detection and early warning

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