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LED Traffic Signal Monitoring, Maintenance, and Replacement Issues (2008) / Chapter Skim
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Appendix B - Vendor LED Traffic Signals Survey
Pages 27-31

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From page 27...
... Additionally, use of LED traffic signals is growing and will continue to grow due, in part, to the recent Department of Energy requirements on signal manufacturers. Therefore, more information is needed to enhance understanding of the maintenance issues faced by public agencies that own, operate and maintain LED traffic signals.
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From page 28...
... ? Design inadequacy 2 33% Poor product quality 3 50% Act of god 2 33% Poor power source 1 16% Improper application 1 16% Undetermined 1 16% Other, please specify (see Table B8)
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From page 29...
... Of the LED traffic signal procurements you are familiar with, how many specify light output indicators that identify when output fails below the specified level? All 0 0% More than 75% 0 0% Between 50 and 75% 0 0% Between 25 and 50% 1 17% Less than 25% 5 83% None 0 0% Total 6 100% TABLE B3 PROCUREMENTS FOR LED TRAFFIC SIGNALS
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From page 30...
... Field testing to a specified minimum light output value 0 0% Replacement schedules based on product service life from the vendor 2 33% Agency defined maintenance practices or procedures 4 67% Total 6 100% TABLE B4 APPROVAL OF LED TRAFFIC SIGNALS FOR USE TABLE B5 ONGOING MAINTENANCE POLICIES AND PROCEDURES TABLE B6 POLICY ISSUES
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From page 31...
... For procurements that do not use the ITE LED specification, how do these specifications differ, other please specify: # Response 1 Custom pedestrian signal requirements 2 Light degradation warning device TABLE B7 QUESTION 5 COMMENTS TABLE B8 QUESTION 6 COMMENTS TABLE B9 QUESTION 9 COMMENTS
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  • fic signals

  • questions apply
  • output defined
  • energy requirements
  • signals represent
  • sample testing

  • enhance understanding
  • schedules based
  • national guidelines
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  • total led


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