| Effectiveness of traffic management in Salt Lake City, Utah. | |
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MedLine Citation:
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PMID: 16516928 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PROBLEM: The effectiveness of speed humps, 14 ft (4.3 m) wide by 3.5 in (8.9 cm) high, and tables, 22 ft (6.7 m) wide, on 12 streets in Salt Lake City, Utah was investigated. Mean and 85th percentile spot speeds, speed limit compliance, motor-vehicle crashes, and resident opinions were considered. METHOD: Spot speeds were collected at 18 "between-hump" locations. Motor-vehicle crash data were obtained for "before" and "after" periods of equal duration. A total of 436 residents were surveyed; 184 responded. RESULTS: The mean and 85th percentile speeds decreased at 14 and 15 locations, respectively. The average reduction in the 85th percentile speed (3.4 mph or 5.4 km/h) was significant in flat and rolling terrain, but not on uphill or downhill segments. The number of sites with 50% speed limit compliance increased from 4 to 12. The number of motor-vehicle crashes decreased from 10 to 9; the change was not significant, but injury crashes decreased from five to one. Regarding the residents, 30% were positive, 25% were negative, and 45% offered suggestions, some of which were conflicting. DISCUSSION: Further study is needed on speed hump spacing and speed tables in hilly terrain. Example results should be shared with residents to inform their decision-making. SUMMARY: At least 78% of the sites experienced a decrease in the mean or 85th percentile speed, or an increase in speed limit compliance. IMPACT ON INDUSTRY: These findings should be useful to agencies that are planning or implementing traffic calming projects, and to analysts. |
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Authors:
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Wayne D Cottrell; Naree Kim; Peter T Martin; H Joseph Perrin |
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Publication Detail:
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Type: Journal Article Date: 2006-03-03 |
Journal Detail:
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Title: Journal of safety research Volume: 37 ISSN: 0022-4375 ISO Abbreviation: J Safety Res Publication Date: 2006 |
Date Detail:
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Created Date: 2006-03-17 Completed Date: 2006-05-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1264241 Medline TA: J Safety Res Country: United States |
Other Details:
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Languages: eng Pagination: 27-41 Citation Subset: IM |
Affiliation:
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Civil Engineering Department, 3801 West Temple Avenue, California State Polytechnic University, Pomona, CA 91768-2557, USA. wdcottrell@csupona.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acceleration Accident Prevention / methods* Accidents, Traffic / prevention & control*, trends Data Collection Humans Program Evaluation* Utah |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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