When available, CCTV system can produce important information for the analysis of real vehicle accidents. The movements of one or more of the involved vehicles, or even the collision itself, could be imaged by security cameras closed to scene of the accident; what happened on the scene after the accident can be recorded and alterations can be found out. However, the existence of a video it is not sufficient in itself: for the actual reconstruction of the accident, quantitative information must be derived from the cameras, such as the positions of the vehicles and/or their speeds. In the present work a possible approach, based on the combined usage of PC-Crash and the laser scanner survey of the scene, is proposed. Three accident reconstruction cases, with available CCTV data, will be discussed and the results of the video-analysis will be compared with the reconstruction of the accidents using PC-Crash.

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