Electronic Theses and Dissertations

Identifier

352

Date

2011

Date of Award

7-21-2011

Document Type

Thesis

Degree Name

Master of Science

Major

Civil Engineering

Concentration

Transportation Engineering

Committee Chair

Stephanie S. Ivey

Committee Member

Martin E. Lipinski

Committee Member

Michail Gkolias

Abstract

The recent advancements in light emitting diode (LED) technology and the comparative energy savings over traditional incandescent bulbs have led to many municipalities retrofitting traffic signals with new LED bulbs. Although a significant amount of literature exists regarding benefits of LED installations in terms of energy and economic savings, less attention has been given to the potential safety impacts of these massive retrofit projects. This thesis will evaluate the safety implications of the change to LED technology in traffic signals in Memphis, Tennessee, where 56 full LED conversions and 712 partial conversions (red and green only) of signalized intersections have occured since 2000 and present findings from analysis before and after crash data to determine the intersection safety impact, if any, of LED traffic signals.

Comments

Data is provided by the student.

Library Comment

dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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