Abstract

The traffic conflict technique (TCT) has been practiced in the United States for over 15 years. Traffic conflict observation began on a large scale in 1969 when the U.S. Federal Highway Administration (FHWA) awarded contracts to three state highway agencies. Teams of observers were employed and the TCT was practiced on a regular basis. Other states also began applying the TCT. The TCT was being utilized to solve operational problems at intersections. There also was the belief that an intersection safety record could be determined without relying on historical accident records. However, because there was a lack of a proven, direct relationship between accidents and conflicts, the United States TCT has received less emphasis from highway administrators and is not being practiced on the large scale that it once was.

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