What should a driver do when approaching traffic lights that change from green to amber?

Accelerate to clear the junction.
Stop the vehicle immediately.
Sound the horn while proceeding through the junction.
Stop, unless it is unsafe to do so.

Explantion: When you are approaching a set of traffic lights showing green, you should take care and be prepared to stop if the amber light comes on.

Theory Tester

What should a driver do when approaching traffic lights that change from green to amber?

Control of Vehicle