Sequence of Traffic Lights
Traffic lights in the UK follow a standardized sequence of three primary colors:
Red: When the red light is displayed, it means stop. All vehicles must come to a complete halt, and you should remain stationary until the light changes to green.
Red and Amber Together: This means that the traffic light is about to turn green, this step allows you to prepare your vehicle to go, however you still need to wait for the green light before moving off.
Amber (Yellow): The amber light indicates that the light is about to turn red. When you see the amber light, you should prepare to stop unless it's unsafe to do so. If you have already passed the stop line or are too close to stop safely, you may proceed.
Green: A green light signals that you can proceed if the way is clear. It means you have the right of way, but you must still yield to pedestrians and other road users who may have the right of way.