Collision risk evaluation method based on vehicle acceleration

The invention discloses a collision risk evaluation method based on vehicle acceleration, and the method specifically comprises the steps: determining the distance between a target vehicle and an adjacent vehicle based on video data; determining whether there is a conflict possibility between the adjacent vehicle and the target vehicle; calculating a deceleration DRAC for avoiding collision according to the motion states of the target vehicle and the conflict vehicle; constructing an over-threshold extremum distribution model according to the deceleration DRAC for avoiding collision, and estimating the over-threshold extremum distribution model to obtain a scale parameter and a shape parameter of generalized Pareto extremum distribution in the over-threshold extremum distribution model; and constructing a conflict extremum model to predict the collision risk according to the deceleration DRAC for avoiding collision and the over-threshold extremum distribution model. The selected traffic conflict index is the