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Abstract Details
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Activity Number:
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253
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Type:
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Contributed
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Date/Time:
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Monday, August 1, 2011 : 2:00 PM to 3:50 PM
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Sponsor:
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Section on Physical and Engineering Sciences
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| Abstract - #303169 |
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Title:
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Analyzing the Effects of LED Traffic Signals on Urban Intersection Safety
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Author(s):
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Peter W. Hovey*+ and Deogratias Eustace and Deogratias Eustace
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Companies:
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University of Dayton and University of Dayton and University of Dayton
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Address:
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300 College Park Dr, Dayton, OH, 45469-2316,
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Keywords:
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Traffic ;
Safety ;
Empirical Bayes ;
LED
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Abstract:
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The use of light emitting diodes (LED's) in traffic signals has become widespread over the past decade. Energy efficiency and long service life are the often-cited reasons for converting from incandescent bulbs to LED's, but could improved safety be another, less obvious benefit? The objective of this paper is to evaluate crashes at signalized urban intersections to determine whether or not crashes were reduced after the installation of LED traffic signals. A before-and-after analysis was conducted for eight intersections using empirical Bayes estimation. The analysis revealed an increase of about 71% in crashes after the installation of LED traffic signals.
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