Abstract
A group of 215 in-depth accident reports prepared as part of a tri-level accident causation study by a multidisciplinary team was examined to assess the benefit derived from the hypothetical application of various combinations of radar warning, radar actuated, and antilock braking systems. The approach was to have an accident analyst evaluate post hoc the benefit which would have been derived if one or more of the vehicles involved in each accident had been equipped with various types and combinations of these hypothetical systems.