Abstract
The traffic conflict technique as developed by General Motors Research Laboratories in 1967 was conceived as a systematic method of observing and measuring high accident potential. Conflicts were defined as the occurrence of evasive vehicular actions and characterized by braking and/or weaving maneuvers. This report crtically evaluates the state-of-art of the traffic conflict technique and the results of recent attempts to develop a rigorous experimental design using traffic conflicts as the basic response variable to measure the effectiveness of access control techniques at commercial driveways.