Reduction in freeway congestion by usage of accident investigation sites. Paper presented at the 52nd Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1973.

Observing that the investigation of freeway accidents even on the shoulders is a cause of delay and congestion, a system is devised whereby the investigations were moved to concealed off-freeway sites. With cooperation from the police, some 60% of a year’s total of 851 accidents on the Gulf Freeway were investigated at these and other off- freeway sites. A benefit-cost ratio of 28: 1 considering the value of reduced delay versus site construction. & maintenance cost, is reported.