Portland Orange is the color of light emitted by the dont walk phase of pedestrian crossing signals in the United States and Canada. The color was chosen to avoid confusion with regular traffic lights in conditions of poor visibility.[1]
Its chromaticity is specified by the Institute of Transportation Engineers in that body's technical standards,[2] along with lunar white for the walk lights.[3][4] Its application is stipulated in the U.S. federal Manual on Uniform Traffic Control Devices.[5] Various jurisdictional standards also require Portland Orange for dont walk signs.[6]
The color can be created with some LEDs,[7][8] and the ITE specifies the precision of its wavelength to 3 nanometers.[2] In practice, the most brilliant color of gaseous tubing is similar to Portland Orange.[9]
International application
Portland Orange is generally not used outside the United States and Canada. In most of the world, red, or another specified color, is used for the dont walk symbol instead of Portland Orange.[4]
References
- ^ "The APWA Reporter". 39–40. American Public Works Association. 1972: 13 – via Google Books.
{{cite journal}}: Cite journal requires|journal=(help) - ^ a b Joint Industry and Traffic Engineering Council Committee (March 19, 2004). "Pedestrian Traffic Control Signal Indications - Part 2: Light Emitting Diode (LED) Pedestrian Traffic Signal Modules" (PDF). Institute of Transportation Engineers. p. 5. Archived from the original (PDF) on December 12, 2007.
- ^ "High Brightness Light Emitting Diodes". Semiconductors and Semimetals. Academic Press. 48: 297. February 9, 1998. ISBN 9780080864457 – via Google Books.
- ^ a b Lee, Jiun-Haw; Liu, David N.; Wu, Shin-Tson (November 20, 2008). "Introduction to Flat Panel Displays". Wiley Series in Display Technology. John Wiley & Sons. 20: 169. ISBN 9780470721940 – via Google Books.
- ^ "Manual on Uniform Traffic Control Devices: 2009 Edition Chapter 4E. Pedestrian Control Features". United States Department of Transportation - Federal Highway Administration. Retrieved July 18, 2017.
- ^ "1300 Installation of Street Lighting Equipment and Traffic Control Devices" (PDF). cincinnati-oh.gov. City of Cincinnati. Archived from the original (PDF) on October 27, 2007.
- ^ "Orange". Research Results Digets. Transportation Research Board, National Research Council (192, 194, 197–211, 213–214, 221): 95. 1996 – via Google Books.
- ^ FHWA Traffic Safety Research Program (1997). Visibility and Comprehension of Pedestrian Traffic Signals (Report). Federal Highway Administration. p. 12 – via Google Books.
- ^ "Pedestrian Lights". Proceedings of the Annual Meeting of the Institute of Traffic Engineers. Institute of Traffic Engineers. 29–34: 134. 1959 – via Google Books.
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This page was last edited on 13 January 2022, at 20:10