Abstract
The traffic conflict technique has been practised in the United States for over 15 years; conflicts were first utilized on a large scale to solve operational problems at intersections, However, because there was a lack of a proven, direct relationship between accidents and conflicts, the US conflict technique has since received less emphasis from highway administrators. New research has been carried out since 1979, with the aims of developing a standardized set of definitions and procedures for measuring traffic conflicts, and validating and calibrating the new technique. This paper describes the present American TCT : definitions, data collection, training of observers, evaluation, etc.