Performed test was limited to use of full green ball, flashing amber ball, flashing red ball; it is recommended that flashing amber indication be used for left-turning traffic during 2-Phase Mode operation, and that flashing amber indication be used at any signalized location which has exclusive left-turn channelization of some type, multiple or lane control type signal indications, and permissive or driver option left turn signal phase.
Methods of signalizing left-turn movements at channelized intersections
Traffic Eng
Traffic Engineering ; 37 , n 8
1967
3 pages
Article (Journal)
English
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