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原文传递 Influence of Roadway Surface Discontinuities on Safety. A State of the Art Report, May 2009.

题名：	Influence of Roadway Surface Discontinuities on Safety. A State of the Art Report, May 2009.
关键词：	pavements,roads,traffic safety;friction, surface roughness, contaminants, ice formation, snow, motor vehicles, maintenance, design;state of the art, accident causes, hydroplaning
摘要：	As the commitment to improve highway safety emerged in the late 1960s and the philosophy of safer roadsides and clear zones took hold nationally there were maintenance issues that challenged the highway engineer to find a practical solution. Prominent among these issues were (a) tirepavement available friction, (b) influence of potholes and road surface roughness, (c) water accumulations, and (d) influence of pavement edge drop-offs. These issues were important because these conditions can never be completely eliminated in all roadways all the time. Thus it was important to be able to prioritize treatment of these conditions so that with limited funds the highest influence on safety could be achieved. This need was addressed by the Transportation Research Board (TRB) Surface PropertiesVehicle Interaction (AFD90) Committee. This committee set up a task group on Roadway Surface Discontinuities and Safety. That group was active from 1980 until the publication of TRBs first state of the art report in 1983. That report, The Influence of Roadway Surface Discontinuities on Safety, was the culmination of the task groups work. / Title Note: Transportation research circular. / Supplementary Notes: See also PB85-114296. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5301 Shawnee Road, Alexandria, VA, 22312, USA. / NTIS Prices: PC A06/MF A06 / NTIS In-house Control Codes: nastrb;12111,1101
报告类型：	科技报告