Evaluation of light-emitting diode beacon light fixtures : final report.

Bullough, John D.; Skinner, Nicholas P.

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Evaluation of light-emitting diode beacon light fixtures : final report.

2009-12-01
By Bullough, John D. ; Skinner, Nicholas P.

File Language:

English

Details

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:
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
Download URL:

https://rosap.ntl.bts.gov/view/dot/18463/dot_18463_DS1.pdf
File Type:

[PDF - 496.77 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:f39b51998f25f4e4f495e91501828999b25d51697bd464581e382d514df94fed

File Language:

English

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