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OFFICE OF RESEARCH, DEVELOPMENT, AND TECHNOLOGY AT THE TURNER-FAIRBANK HIGHWAY RESEARCH CENTER

Safety Evaluation of Converting Traffic Signals From Incandescent to Light-Emitting Diodes

Publication Information

Publication Type:
Summary Report
Publication Number:
FHWA-HRT-13-070
Abstract:

Across the Nation, many agencies have been replacing conventional incandescent light bulbs in traffic signals with light-emitting diodes (LED). LEDs are primarily installed to reduce energy consumption and decrease maintenance. In addition, LEDs are expected to last much longer compared with incandescent bulbs and tend to age gradually. However, a recent study revealed several potential problems with LEDs, including their inability to melt snow and issues related to visual discomfort caused by glare at night.

Publishing Date:
July 2013
Author(s):
Srinivasan, Raghavan
Carter, Daniel
Publishing Office:
Office of Safety Research and Development
FHWA Program(s):
Safety
Research
AMRP Program(s):
Safety Data and Analysis
FHWA Activities:
Highway Safety Information System
Subject Area:
Safety and Human Factors