High-Accident Spot-Improvement Program

by Kenneth R. Agent, Sr. Research Engr.; Kentucky Bureau of Highways, Lexington, Ky.,
Robert C. Deen, (F.ASCE), Asst. Dir. of Research; Kentucky Bureau of Highways, Lexington, Ky.,
John A. Deacon, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Univ. of Kentucky, Lexington, Ky.,


Serial Information: Transportation Engineering Journal of ASCE, 1976, Vol. 102, Issue 2, Pg. 427-445


Document Type: Journal Paper

Abstract: As a result of an extensive before and after accident study, the high-accident location program, was found to have significantly decreased the number of motor vehicle accidents. Favorable benefit-cost ratios indicated that the cost of the Program has represented a good investment in comparison with the resultant savings in accident cost. Detailed analysis of available accident data showed that, for studies of the type reported, the 12-month period immediately prior to the date of identification of a high-accident location is not a reliable period for representing the actual long-term before accident experience. A much more acceptable period is the 12 months beginning 2 yr in advance of the date of identification. Further analysis also showed that a route segment of 0.1 mile (0.16km) is not of sufficient length for properly identifying high-accident locations for accumulating accident statistics to support a before and after study. Since only slightly more than 5% of the identified high-accident locations were judged to warrant improvement, the procedure used in Kentucky for identifying high-accident locations, i.e., those having three or more accidents at a 0.1-mile (0.16-km) location during a 12-month period, was found to be inefficient.

Subject Headings: Accidents | Traffic accidents | Vehicles | Benefit cost ratios | Routing (transportation) | Comparative studies | Investments | Data analysis | North America | Kentucky | United States

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