Portland Orange

{{Infobox colour

| title=Portland Orange (desaturated approximation)

| image=Image:US DontWalk Traffic Signal.JPG

| hex=FF5A36

| spelling=color

| source=CIECD

| isccname=Vivid reddish orange}}

Portland Orange is the color of light emitted by the {{smallcaps|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.{{cite journal|title=The APWA Reporter|volume=39–40|publisher=American Public Works Association|year=1972|via=Google Books|url=https://books.google.com/books?id=pqchAQAAMAAJ|page=13}}

Its chromaticity is specified by the Institute of Transportation Engineers in that body's technical standards,{{cite web|url=http://www.ite.org/standards/PTCSI_Part2_0406.pdf|title=Pedestrian Traffic Control Signal Indications - Part 2: Light Emitting Diode (LED) Pedestrian Traffic Signal Modules|page=5|author=Joint Industry and Traffic Engineering Council Committee|publisher=Institute of Transportation Engineers|date=March 19, 2004|archiveurl=https://web.archive.org/web/20071212165155/http://www.ite.org/standards/PTCSI_Part2_0406.pdf|archivedate=December 12, 2007|url-status=dead}} along with lunar white for the {{smallcaps|walk}} lights.{{cite journal|url=https://books.google.com/books?id=gRvvM7skEzQC|title=High Brightness Light Emitting Diodes|journal=Semiconductors and Semimetals|volume=48|date=February 9, 1998|isbn=9780080864457|via=Google Books|publisher=Academic Press|page=297}}{{cite journal|title=Introduction to Flat Panel Displays|url=https://books.google.com/books?id=8GGJeOC7UO8C|page=169|first1=Jiun-Haw|last1=Lee|first2=David N.|last2=Liu|first3=Shin-Tson|last3=Wu|date=November 20, 2008|publisher=John Wiley & Sons|journal=Wiley Series in Display Technology|volume=20|isbn=9780470721940|via=Google Books}} Its application is stipulated in the U.S. federal Manual on Uniform Traffic Control Devices.{{cite web|url=https://mutcd.fhwa.dot.gov/htm/2009/part4/part4e.htm|title=Manual on Uniform Traffic Control Devices: 2009 Edition Chapter 4E. Pedestrian Control Features|publisher=United States Department of Transportation - Federal Highway Administration|accessdate=July 18, 2017}} Various jurisdictional standards also require Portland Orange for {{smallcaps|dont walk}} signs.{{cite web|url=http://www.cincinnati-oh.gov/transeng/downloads/transeng_eps13612.pdf|archiveurl=https://web.archive.org/web/20071027061959/https://www.cincinnati-oh.gov/transeng/downloads/transeng_eps13612.pdf|archivedate=October 27, 2007|url-status=dead|title=1300 Installation of Street Lighting Equipment and Traffic Control Devices|publisher=City of Cincinnati|website=cincinnati-oh.gov}}

The color can be created with some LEDs,{{cite journal|url=https://books.google.com/books?id=ejdQAAAAYAAJ|page=95|via=Google Books|journal=Research Results Digets|issue=192, 194, 197–211, 213–214, 221|publisher=Transportation Research Board, National Research Council|year=1996|title=Orange}}{{cite report|date=1997|title=Visibility and Comprehension of Pedestrian Traffic Signals|publisher=Federal Highway Administration|page=12|author=FHWA Traffic Safety Research Program|via=Google Books|url=https://books.google.com/books?id=jTCT9NOXP4cC}} and the ITE specifies the precision of its wavelength to 3 nanometers. In practice, the most brilliant color of gaseous tubing is similar to Portland Orange.{{cite journal|title=Pedestrian Lights|journal=Proceedings of the Annual Meeting of the Institute of Traffic Engineers|volume=29–34|publisher=Institute of Traffic Engineers|year=1959|via=Google Books|page=134|url=https://books.google.com/books?id=PgvWAAAAMAAJ}}