Safety Effectiveness of the Road Diet Treatment in Rhode Island
A road diet is a low-cost countermeasure which typically involves converting an existing four-lane undivided roadway to a three-lane roadway, reducing the section to two through lanes and a center two-way left-turn lane. The objective of this evaluation was to estimate the safety effectiveness of road diets by developing a crash modification factor (CMF) specific to the U.S. state of Rhode Island. To account for potential selection bias and regression-to-the-mean, an empirical Bayes before-after analysis was conducted, using reference groups of untreated four-lane undivided roadways with similar characteristics to the treated sites. Results indicated a 29% decrease (CMF?=?0.71) in total crashes and a 37% reduction in fatal and injury crashes (CMF?=?0.63). The expected results of the evaluation will help Rhode Island Department of Transportation to determine a statewide direction for implementation of the countermeasure.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- Yuying Zhou https://orcid.org/0000-0002-4394-3653 © National Academy of Sciences: Transportation Research Board 2022.
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Authors:
- Zhou, Yuying
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0000-0002-4394-3653
- Himes, Scott
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0000-0003-2932-7691
- Le, Thanh
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0000-0001-7558-8978
- Gooch, Jeff
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0000-0003-1227-0967
- Northup, Kayla
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0000-0002-7645-6456
- Pavao, Peter
- Publication Date: 2022-7
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 24-31
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Volume: 2676
- Issue Number: 7
- Publisher: Sage Publications, Incorporated
- ISSN: 0361-1981
- EISSN: 2169-4052
- Serial URL: http://journals.sagepub.com/home/trr
Subject/Index Terms
- TRT Terms: Before and after studies; Crash modification factors; Crash rates; Highway design; Highway safety; Traffic lanes
- Geographic Terms: Rhode Island
- Subject Areas: Design; Highways; Operations and Traffic Management; Safety and Human Factors;
Filing Info
- Accession Number: 01838848
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Mar 18 2022 8:39AM