Abstract: The purpose of the study is to find out the appropriate evasion time of collision avoidance system. By using the video cameras mounted on tall structures to acquire 10.5 hour video records of traffic streams at no-signal intersection, the thesis extracted and analyzed 808 samples with the aid of video detection. Based on the traffic conflict technology, conclusions were drawn as follows: 1) the basis for avoidance decision is time to collision (TTC); 2) the activation time of CAS should be restricted within a definite range, whose upper limit is the evasion time of normal driving and lower limit is the critical time.


Key words: video detection, collision avoidance system, traffic conflict technology, TTC, collision avoidance behavior, evasion time, critical time, avoidance margin
