United States Department of Transportation
i
Heavy Vehicle Escape Ramps – A Review of Current Knowledge
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1982-04-01
[PDF-4.93 MB]
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Edition:Final Report
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Abstract:The objectives of this study are to: (1) review current truck escape ramp literature; (2) document all acceptable designs; (3) determine any and all shortcomings in the current method of arresting heavy vehicles and recommend specific research needs to eliminate these deficiencies; and (4) develop a framework of information, criteria, and specifications concerning truck escape ramps such that national design standards may later be developed. Pertinent literature from all available sources, e.g., professional meeting proceedings, state transportation agencies' design plans and research studies, was gathered and critiqued for acceptable and poor design aspects. These design aspects are manifested in six types of truck escape ramps: sandpile, gravity ramp, ascending grade arrester bed, horizontal grade arrester bed, descending grade arrester bed, and roadside arrester bed. Each of the truck escape ramp types has some design elements, e.g., length, width, depth, signing, etc., for which there are still many unanswered questions. Thus, there are several topics suggested for future research. In addition, interim guidelines are provided for the design of truck escape ramps.
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