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Survey Questionnaire

The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute is conducting a telephone survey of states, counties and municipalities about the use of light emitting diode lamps in traffic signals. This survey is being conducted in cooperation with the Pacific Gas and Electric (PG&E) Company, a utility company in California that is interested in improving the energy efficiency and lowering the operating cost of traffic signals.

The survey should take approximately 20 minutes of your time. Are you willing to participate (or do you know someone in your agency who would be willing)? Is this a good time, or should I call back at a latter time?

  1. Are you the person principally responsible for specifying the types of lamps used in your traffic signals?
    (If yes, may I confirm your name and telephone number for future reference? If no, may I ask for the name and telephone number of the person who is?)
  2. Have you installed LED lamps in some or all of your traffic signals?
    (If yes, go to 2a. If no, go to question 2b, then skip to 10.)
    1. What are the principal reasons for installing LED traffic signals?
    2. What are the principal reasons for not installing LED signals?
  3. How many of your signals did, or will you install? How many signals do you have? What colors are you using or planning to use (red only, red and orange pedestrian, all colors, etc.)?
  4. If you are installing LED signals, are you doing so just for retrofit, just new construction, or both?
  5. What is the approximate price of LED signal heads? of conventional traffic signal lamps?
  6. Have any rebates, grants, loans or other financial assistance been available?
  7. Have you experienced (or do you anticipate) energy savings caused by the LED traffic signals? Can you quantify the annual savings (in dollars, or kilowatt-hours)?
  8. Do you consider LED signals to be inexpensive or expensive?
  9. Please briefly describe your procurement/ordering/purchasing process. Do you use a specification? If so, whose?
  10. What are the major differences between LED traffic signals and conventional signals?
  11. What major differences, if any, are there among the different colored LED signals?
  12. Would your rates for electricity affect a decision to use LED traffic signals?
  13. How visible are LED traffic signals compared to conventional traffic signals?
  14. How well would LED traffic signals work in different kinds of weather?
  15. How do LED traffic signals perform with different types of installation (pole-mounted, suspended, etc.)?
  16. What could an organization that is interested in energy efficiency and environmental improvement do to help you install more efficient traffic signals?
  17. Do you have any specific questions or comments about LED traffic signals?
  18. The LRC and PG&E have developed a web site with technical information about LED traffic signals. The address is: Please feel free to take a look at the information on that site and contact us if you have further questions. Thank you for your time.

    Survey and Results
    1. Survey Questionnaire
    2. List of Municipalities Surveyed
    3. Market Snapshot
    4. Specification and Purchasing
    5. Technical Issues
    6. Potential Market Activities
    7. Summary and Conclusion
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