00464594

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http://onlinepubs.trb.org...trr/1987/1111/1111-005.pdf

https://scholar.google.co...Berg&publication_year=1987

Recent development of opportunity-based accident rate expressions provides a potentially more sensitive set of indicators for use in safety studies. A comparison and evaluation of conventional versus opportunity-based accident rate expressions was undertaken for a set of 50 case study signalized intersections in Broward County, Florida. The effect of level of aggregation of the exposure data was examined, as well as differences in the rating of intersections by degree of hazard. It was found that hourly traffic volume counts may be necessary for reliable estimation of opportunity-based exposure levels and that the use of opportunity-based accident rate measures will yield significantly different hazard rankings compared with conventional accident rate expressions. Issues relating to exposure-based versus conflict-based opportunity expressions are also discussed.

Publication of this paper sponsored by Committee on Methodology for Evaluating Highway Improvements. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

00496549

pp 42-48

1987

Transportation Research Record

0-309-04463-4

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Figures (1) ; References (6) ; Tables (4)

Case studies; Crash exposure; Crash rates; Estimates; Hazards; Ranking (Statistics); Reliability; Signalized intersections; Traffic counts

Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics

TRIS, TRB

Dec 31 1987 12:00AM

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