An amber light means that you must not go beyond the stop line or, if there is no stop line, you must not go beyond the light. However, you may go on if you are so close to the line or the light when the amber light first appears that stopping would be dangerous.
A green arrow (also known as a filter light) means that you may move on in the direction of the arrow, assuming it is safe and the way is clear, even if a red light is also showing.
If you wish to turn right at a set of traffic lights that has an arrow to the right (or white rectangular box with white arrow), drive into the junction when you see a green light. Take care not to block any oncoming traffic. Then, when it is safe, finish your turn. You should only wait for the filter arrow for turning right when you are in the junction and if it would be dangerous to finish your turn before the filter light appears.
A flashing amber arrow pointing left can appear at a junction with another road. It means that you may move on past the traffic light, but only if you first give way to traffic already coming through the junction on the other road. A flashing amber arrow may sometimes be used in place of a green light, which indicates you must yield to conflicting traffic and pedestrians. You must only proceed if it is safe to do so.
Remember that a flashing amber light at a pelican crossing means you must yield to pedestrians. See Section 18, on pedestrian lights.
Note: If the traffic lights at a controlled junction are out of order, you must first stop at the control line and only proceed when it is safe to do so ensuring you yield to all other traffic who have right of way.