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原文传递 Validation of ODOT Sufficiency Rating System. Final rept.

题名：	Validation of ODOT Sufficiency Rating System. Final rept.
作者：	pant, p. d. rajagopal, a. penmetsa, s. r.
关键词：	Pavement-conditions; Ratings-; *Ohio-.;Highways-; Volume-; Capacity-; Highway-safety; Recommendations-; Statistical-analysis; Accident-rates; Bridges-; Traffic-volume; Performance-indicators.
摘要：	A composite indicator, termed 'sufficiency rating,' can be used to determine how sufficient is each segment of the highway when compared to a properly designed, constructed and operated highway. This study first presents an overview of ODOT's current sufficiency rating (SR) system followed by a comparative study of SR systems in other states. The system developed by ODOT, like most other states, was based on the opinions of an expert panel who, based on their previous knowledge and experience, selected the type and number of parameters including the weights assigned to each parameter. A 0 to 100 points scale represented the sufficiency rating of a highway segment. This approach for developing a sufficiency rating system was subjective and would likely introduce a bias in the system when implemented. Hence, the researchers recommended an objective approach for developing the SR system which consisted of three major variables namely, Condition, Congestion, and Crashes. Condition was represented by PCR (Pavement Condition Rating), Congestion was represented by Volume/Capacity Ratio and Crashes was represented by Crash Density. A statistical technique called Principal Component Analysis was used for developing mathematical models to calculate the sufficiency ratings for 10 functional classifications of highways in the State of Ohio. The models are expected to adequately describe the overall condition of the highway with the variables appropriately identified and weighed to reflect their significance with minimal bias in the system. It is recommended that the statewide sufficiency rating models for 10 functional classifications of highways be implemented by the Ohio Department of Transportation so it would lead toward a better allocation of scarce resources in the future.
报告类型：	科技报告