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原文传递 Update of Condition Rating Survey (CRS) Calculation/Prediction Models, Phase 2: CRS Calculation Model Development.

题名：	Update of Condition Rating Survey (CRS) Calculation/Prediction Models, Phase 2: CRS Calculation Model Development.
作者：	heckel, l. b. ouyang, y.
关键词：	prediction models, illinois, surface types, surveys, graphs (charts), model development, severities, digital images, distresses, computer software
摘要：	The Illinois Department of Transportation (IDOT) surveys every state-maintained roadway in a two-year cycle. Images of the roads are collected digitally and viewed at workstations in the office. The five predominant distresses and their severities are determined and inputted into software that calculates a Condition Rating Survey (CRS) value, using models determined through previous research. The object of Phase 2 of this project was to revise the existing models and develop new models for pavement types that currently do not have models. The model form used consists of determining CRS as a function of roughness, rutting and faulting (where appropriate), and recorded distresses and severities. / NOTE: Interim proj. rept. / Supplementary Notes: See also PB2007-110362, PB2008-113462 and PB2008-113463. Prepared in cooperation with Illinois Univ. at Urbana-Champaign, Illinois Center for Transportation. Sponsored by Illinois State Dept. of Transportation, Springfield. and Federal Highway Administration, Washington, DC. / Availability Note: Also available on CD-ROM. Product reproduced from digital image. 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 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0824；140p
报告类型：	科技报告