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:
  • Light emitting diodes
  • Highway beacons
  • Beacon light, LED beacon,
  • rotating beacon, closure
  • detection
• 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.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18301/dot_18301_DS1.pdf
• File Type:
  [PDF - 496.77 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9f6115777e76f047f680072bad6dc96ed279136d34622a92b2a13e259b56007c