Gholamali Shafabakhsh - Assistant Professor, Faculty of Civil Engineering, Semnan university, Semnan
Mehdi Mohammadi - MS.c. Student of Transportation , Semnan university , Semnan
Raheb Mirzanamadi - MS.c. Student of Transportation , Sharif university , Tehran

The rare-end accidents, both in number and in severity, are one of the most important concerns which have been investigated for a long time. If a driver does not have the ability (or is not able to) to distinguish advance vehicle brake lights from tail ones, the probability of collisions between these two vehicles will raise intensely. Participants in this study were put in two visual search circumstances; they were asked to detect the time of the braking; first when both of the tail andbrake lamps were red, second when they differed (brake lamps were red and trail ones were yellow).The results confirmed the second assumption, in which the participants reactions increased and rate of diagnostic errors decreased. With respect to this study and previous ones, using proposed ideas to separate the colorsof tail and brake lamps can reduce the rate of rare-end accidents, both in number and in severity

rare-end accident , tail lamp , brake lamp