Why doesn’t the right turn green arrow always appear when I’m turning right?
This is usually because the appearance of the right turn arrow is dependent on the number of vehicles waiting to turn right. In order to avoid unnecessary delay, junctions are often configured to allow the first two or so vehicles to turn right during the period when the oncoming traffic loses right of way and before the next traffic phase begins. When more than two vehicles are waiting to turn right they will require more time to safely clear through the junction. The green right turn arrow then appears to provide additional time for this movement.
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