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en.wikipedia.org/wiki/Traffic-light_signalling_and_operation

In this installation, it is the first traffic light on a rural highway for miles, and traffic approaches at highway speed (65 mph). The double red light makes the red phase of the light visible at a greater distance than the yellow and green on the same signal.

ops.fhwa.dot.gov/publications/fhwahop08024/chapter4.htm

A pedestrian phase is defined as a traffic phase allocated to pedestrian traffic that may provide a pedestrian indication either concurrent with one or more vehicular phases, or separate from all vehicular phases. A traffic phase is defined as the green, change, and clearance intervals in a cycle assigned to specified movement(s) of traffic.

en.wikipedia.org/wiki/Traffic_light

The first four-way, three-colour traffic light was created by police officer William Potts in Detroit, Michigan in 1920. Ashville, Ohio claims to be the home of the oldest working traffic light in the United States, used at an intersection of public roads from 1932 to 1982 when it was moved to a local museum.

nacto.org/docs/usdg/traffic_signal_phasing_buckholz.pdf

To maintain clarity, this course defines a phase as any traffic signal display with its own set of timings that controls an individual vehicle or pedestrian movement. Examples would be a westbound left turn phase, a northbound thru phase, or a northbound pedestrian phase.

www.drivingtesttips.biz/traffic-lights-sequence.html

Pedestrian crossing traffic lights sequence. All light controlled pedestrian crossings use the same light sequence as the traffic light sequence detailed above with the exception of the Pelican crossing. Where the Pelican crossing differentiates is with the flashing amber phase.

mocktheorytest.com/resources/traffic-lights-uk

The UK’s traffic light colours conform to the international norm of red, yellow (amber) and green, but their phasing is different from some other countries. What is the traffic light phase or cycle? Lights go from red to red and amber to green to amber and back to red.

www.sciencedirect.com/science/article/pii/S235197891500880X

This research examined driver behavior towards four types of traffic light warning schemes currently in use across Metro Manila, Philippines. The first phase of the study involved surveys with drivers to know what they say they do upon reaching the red, yellow, and green lights at intersections.

sumo.dlr.de/wiki/Simulation/Traffic_Lights

The generated phase layout is also influenced by the node type which may be either traffic_light or traffic_light_right_on_red (explained below) Default 4-arm intersection (layout opposites) By default, programs are generated with 4 green phases: a straight phase; a left-turning phase (only if there is a dedicated left-turn lane)

ops.fhwa.dot.gov/publications/fhwahop08024/chapter5.htm

Semi-actuated control has several advantages. Its primary advantage is that it can be used effectively in a coordinated signal system. Also, relative to pre-timed control, it reduces the delay incurred by the major-road through movements (i.e., the movements associated with the non-actuated phases) during periods of light traffic.

www.tmr.qld.gov.au/Travel-and-transport/Road-and-traffic-info/Traffic-Signals...

The traffic signals at each intersection can be programmed to operate in an isolated mode or be coordinated with traffic signals at adjacent intersections to allow the progression of traffic along the road. In isolated mode, traffic signals changes are driven by the vehicle loop detectors and pedestrian push buttons at the intersection (see above).