Title: PROCEDURE FOR DETERMINING FREQUENCIES TO INSPECT AND REPAIR HIGHWAY SAFETY HARDWARE
Abstract:A procedure was developed for setting time periods for inspection and repair of highway safety hardware that would maximize highway safety benefits, subject to the constraints of available resources. ...A procedure was developed for setting time periods for inspection and repair of highway safety hardware that would maximize highway safety benefits, subject to the constraints of available resources. Attention was directed to traffic barriers (roadside and median, transitions and end treatments, bridge rail and crash cushions) and to sign supports and panels. Current practices for maintaining safety hardware were investigated through literature searches and visits to highway agencies. Interviews were conducted with operations, traffic, safety, and maintenance personnel seeking descriptions of procedures and information used in detecting, scheduling, and completing the maintenance or repair of safety hardware. Specific inquiries were made about the availability, levels of detail and the use of traffic volume and accident data, with specific attention to accidents involving safety hardware. The procedure is an application of the Poisson statistical distribution, using traffic volume and accident data to calculate the time interval during which no accidents would be expected to occur at a selected location. This time interval can be used for scheduling of inspection or repair activities. Parametric tables for ranges of traffic volumes, accident rates, and probability levels are included which make further calculations unnecessary for most applications. (FHWA)Read More
Publication Year: 1983
Publication Date: 1983-12-01
Language: en
Type: article
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