LED traffic signal management system : tech summary.

Details

• Creators:
  Courville, Leticia S. F. R.
• Corporate Creators:
  Louisiana Transportation Research Center
• Contributors:
  Rupnow, Tyson D.
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; Louisiana State University (Baton Rouge, La.)
• Subject/TRT Terms:
  Data Collection Equipment Replacement Light Emitting Diodes Luminous Intensity Service Life Traffic Signals
• Publication/ Report Number:
  FHWA/LA.15/563 ; LTRC Project Number: 10-3P
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The light source of a signal module is comprised of an array of multiple individual light emitting diodes (LEDs).
  
  Fading of the array over its operational life is a serious concern of traffic engineers throughout the nation. The
  
  Institute of Transportation Engineers (ITE) developed minimum luminous intensity standards for LED signal
  
  modules that vary depending on the angle of the driver’s view.
  
  There are approximately 3,350 Louisiana intersections that utilize more than 100,000 LED traffic signal
  
  modules. The Louisiana Department of Transportation and Development (DOTD) is considering a replacement
  
  schedule based on signal module lifecycle curves. These curves can show the time duration it takes for the
  
  luminous intensity of the traffic signal modules to reduce from the initial value to the ITE minimum luminous
  
  intensity, below which it will be necessary to replace the traffic signal modules. As such, these curves
  
  represent the safe range of operation between the initial luminous intensity and
  
  ITE minimum luminous intensity.
  
  
• Format:
  PDF
• Alternate URL:
  http://www.ltrc.lsu.edu/pdf/2016/ts_563.pdf
• Funding:
  State Project Number: 736-99-1733
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5fd7493fb32ebcb9e801b0dc27a75bee1958c3be2fdedd719ae2910728aeb3e1
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30898/dot_30898_DS1.pdf
• File Type:
  [PDF - 204.02 KB ]