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LED Traffic Signal Monitoring, Maintenance, and Replacement Issues (2008) / Chapter Skim
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Aspects of Successful Practices
Pages 8-9

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From page 8...
... Purchase specifications should also consider requesting degradation information from manufacturers under varying operating conditions. There is clearly a need for an LED replacement schedule that routinely replaces a portion of the LED signal modules every year so that agencies are not placed in a position of infrequent, but expensive, replacement programs that tend to postpone replacement of LEDs that have passed their useful life.
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From page 9...
... The simplest form of replacement strategy would be to begin by not doing a systemwide replacement program. The most conservative and potentially most costly approach is to have a maintenance program based on the LED warranty period.
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Key Terms

  • traffic signal
  • successful practices
  • replacement strategy
  • replacement schedule
  • signal modules

  • duty cycles
  • replace leds
  • led traffic
  • laboratory testing
  • oakland county

  • incandescent lamps
  • road commission
  • maturely replace
  • degradation owing
  • locations installed

  • leds installed
  • maintenance depreciation
  • insights developed
  • led warranty
  • synthesis study

  • sample leds
  • successful led
  • life span
  • varying conditions
  • systematic monitoring

  • lab tests
  • program based
  • maintenance history
  • experience base
  • systemwide replacement


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