Proceedings of National Highway Safety Bureau Priorities Seminar, held at Fredericksburg, Virginia, July 18-20 1969. Volume 5: speed related accident countermeasures and their priorities.

This report informs about the speed in relation to accidents. It is useful to think of speed in the following contexts: 1) High speed; 2) Excessive speed for conditions; 3) Differential speed or speed gradients in the traffic stream.