Evaluation of light-emitting diode beacon light fixtures.

Details

• Alternative Title:
  Final report : evaluation of light-emitting diode beacon light fixtures
• Creators:
  Bullough, John D. ; Skinner, Nicholas P.
• Corporate Creators:
  Rensselaer Polytechnic Institute. Lighting Research Center
• Corporate Contributors:
  New York (State). Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Beacon Light, LED Beacon, Detection Highway Beacons Light Emitting Diodes Rotating Beacon, Closure
• Publication/ Report Number:
  C-08-22
• Resource Type:
  Tech Report
• Geographical Coverage:
  New York
• Corporate Publisher:
  New York (State). Dept. of Transportation
• Abstract:
  Rotating beacons containing filament light sources have long been used on highway maintenance trucks
  
  to indicate the presence of the truck to other drivers. Because of advances in light-emitting diode (LED)
  
  technologies, flashing lights containing LEDs are beginning to be used in place of conventional rotating
  
  beacons. These devices use considerably less power, an important consideration for an equipment-laden
  
  maintenance truck. To ensure that LED beacon lights will provide a comparable warning signal to
  
  drivers approaching vehicles outfitted with them, their photometric and temporal characteristics were
  
  measured and compared to human response time data. In addition, several LED beacon light fixtures
  
  were compared to conventional rotating beacons in terms of the distance at which observers could detect
  
  that a vehicle had moved closer to the observer (the longer this distance, the better performance is).
  
  LED beacon lights provided equivalent closure detection distances as conventional rotating beacons, as
  
  long as they were used in pairs as per common practice. Closure detection distances when only one
  
  beacon light was present were statistically significantly shorter. Overall, the results suggest that using
  
  LED beacon light fixtures provides comparable visual information to other drivers, while using
  
  substantially less power.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9f6115777e76f047f680072bad6dc96ed279136d34622a92b2a13e259b56007c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18301/dot_18301_DS1.pdf
• File Type:
  [PDF - 496.77 KB ]