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OTREC-RR-10-13

eBook (PDF), 52 Pages
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Traffic oscillations are typical features of congested traffic flow that are characterized by recurring decelerations followed by accelerations (stop-and-go driving). This report describes the impact of freeway traffic oscillations on traffic safety. This study employs a matched case-control design using high resolution traffic and crash data from a freeway segment. Traffic conditions prior to each crash were taken as cases, while traffic conditions during the same periods on days without crashes were taken as controls. These were also matched by presence of congestion, geometry and weather; 82 cases were extracted from data from 2004 to 2007. Conditional logistic regression models were developed based on the case-control samples. The results reveal that the standard deviation of speed (thus, oscillations) is a significant variable. The average traffic states prior to crashes were less significant than the speed variations in congestion.
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Product Details

Publisher
OTREC
Published
September 29, 2011
Language
English
Pages
52
File Format
PDF
File Size
670.47 KB

Formats for this Ebook

PDF
Required Software Any PDF Reader, Apple Preview
Supported Devices Windows PC/PocketPC, Mac OS, Linux OS, Apple iPhone/iPod Touch... (See More)
# of Devices Unlimited
Flowing Text / Pages Pages
Printable? Yes
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