Why do some left-turn arrows allow cars to turn only when the green arrow is displayed, and not during the through phase?
This phase, known as protected-prohibited, is designed to separate left-turning traffic from opposing through traffic. These signals are operating for safety reasons where double left-turn lanes exist, or where there are a high number of left-turning accidents. 100 Avenue and 108 Street, and 116 ave and 100 street are a couple of examples of this phase in Grande Prairie.
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- Why do some left-turn arrows allow vehicles to turn only when the green arrow is displayed and not during the through phase?
- Why do some left-turn arrows allow cars to turn only when the green arrow is displayed, and not during the through phase?
