A Temporal-spatial Collision Warning Method at Non-signalized Intersection

For the complexity of accidents occurredat the intersections, a temporal-spatial collision warning method was proposed. On the basis of vehicle's passing time of the conflict zone, the algorithm calculated probability of accident was established. Due to the deficiencies of considering time coordinate only, spatial coefficient which represented the relationship between actual distance and safety braking distance was used to correct the algorithm. A two-way and two-lane intersection was taken as an example. The drivers were divided into three categories: normal, negative and positive. Finally, special warning method was used to remind different kinds of drivers to avoid accidents. The results illustrated that the system should warn the negative drivers earlier and a delay warning measure should be taken for positive drivers.