The rapid technological advancements towards automated and connected vehicles are not only changing mobility to a considerable extent. But also, the reconstruction of traffic accidents will noticeably change in its complexity due to the precollisional influence of Advanced Driver Assistance Systems (ADAS). A variety of different functions warn and inform the driver, intervene autonomously and temporarily in the vehicle's driving dynamics or take over entire longterm dynamic driving tasks. With the help of a survey, in which 173 international experts in accident analysis participated, the challenges for traffic accident reconstruction associated with the technological changes were identified. The results of the survey demonstrate that a significant number of traffic accidents involving ADAS cannot be reconstructed doubtless. One of the main reasons is a lack of available technical information that can be gathered independently from the manufacturer. Especially technical information of the precollisional influence of ADAS on the behavior of the vehicle’s driving dynamics and on the behavior of the driver are often missing. In order to meet these facts, it is necessary to store the ADAS related crash data in an Event Data Recorder (EDR) that is accessible for traffic accident analysts independently from the vehicle manufacturer. The ultimate goal would be an EDR that meets all the needs from an accident analyst’s point of view – a Forensic Event Data Recorder (FEDR).