Editing Traffic light (section)

== External links ==
{{Commons and category|Traffic lights|Traffic signals}}
* [https://ops.fhwa.dot.gov/arterial_mgmt/index.htm FHWA Arterial Management Website, latest information on traffic signal operations]
* [http://projects.kittelson.com/pplt/displays2.htm Animations of various US signal phasings] {{Webarchive|url=https://web.archive.org/web/20130517071152/http://projects.kittelson.com/pplt/displays2.htm |date=17 May 2013 }}
* [http://www.scats.com.au/ SCATS{{snd}}Sydney Coordinated Adaptive Traffic System]
* [https://purl.fdlp.gov/GPO/gpo41380 Safety Evaluation of Converting Traffic Signals from Incandescent to Light-emitting Diodes: Summary Report] [[Federal Highway Administration]]
* [https://purl.fdlp.gov/GPO/gpo41381 Safety Evaluation of Discontinuing Late-night Flash Operations at Signalized Intersections: Summary Report] [[Federal Highway Administration]]
* [http://dc.lib.jjay.cuny.edu/index.php/Detail/Object/Show/object_id/367 Traffic signals, 1922], digitized [[NYPD]] photograph from the [[Lloyd Sealy Library]] Digital Collections

{{Traffic signs}}
{{Artificial light sources}}
{{Authority control}}

[[Category:Traffic signals|*]]
[[Category:1868 introductions]]
[[Category:Street furniture]]
[[Category:Traffic law]]
[[Category:Articles containing video clips]]
[[Category:History of road transport]]
[[Category:Pedestrian crossings]]
[[Category:Semaphore]]