Traffic lights control the flow of traffic at junctions and crossings. The examiner is watching how you react to changes, where you stop, and whether you understand advanced signals such as filter arrows and flashing amber lights.
The basic sequence is red, red and amber together, green, amber, then red again. On red you must stop behind the stop line. On red and amber, prepare to move but do not cross the line until the light turns green. On green, proceed if the junction is clear. On amber, stop unless you have already crossed the stop line or are so close that stopping would be dangerous.
Filter arrows allow specific movements while other traffic is stopped. A green arrow pointing left means you may turn left even if the main light is red. A green arrow pointing straight ahead means you may proceed straight while cross traffic is held. Always check that the arrow applies to your lane and direction before moving.
Flashing amber lights at pelican crossings mean you may proceed only if the crossing is completely clear of pedestrians. If anyone is still on the crossing or approaching it, you must wait. Puffin crossings do not have flashing amber lights: they use sensors to detect when pedestrians have cleared, and the lights stay red until it is safe.
Temporary traffic lights at roadworks follow the same rules as permanent lights. Always stop at the red light and wait your turn. Never squeeze through on amber or red at roadworks: the lanes are often narrow and visibility is reduced.