You’re in the left-hand lane at traffic lights, waiting to turn left. At which of these traffic lights mustn’t you move on?

Explanation: At some junctions, there may be separate signals for different lanes. These are called 'filter' lights. They're designed to help traffic flow at major junctions. Make sure that you're in the correct lane and proceed if the way is clear and the green light shows for your lane.

Category: Road and traffic signs