Traffic signal arrows are a feature that offers a safe period of time for vehicles to turn without opposing traffic.
Protected only arrow
A protected only arrow signal will have the green arrow flash for a period of time. Then the signal switches to amber and finally to a red signal. The protected arrow implies that turning vehicles are served without opposing traffic or pedestrians.
This type of arrow is mandatory for safety reasons. For example, if the turn direction has dual turning lanes or there is a high speed limit for the traffic in the opposite lane. To ensure the highest safety for Calgarians on the roads, a protected-only arrow signal cannot be revised to a protected-permitted arrow signal.
A protected/permitted arrow signal begins with a protected green arrow signal and is followed by a solid permitted green signal. During the permitted green period, turning vehicles must yield to opposing traffic and pedestrians.