You are driving on a motorway and see a railway level crossing on the slip road you are leaving by. The red warning lights start flashing, but the barriers have not yet begun to lower and you cannot yet see a train. What should you do?

Explanation

The Highway Code Rule 34 states that you MUST NOT cross or pass a stop line when the red lights show at a railway level crossing. This applies even if the barriers have not yet started to lower and you cannot see a train. You must wait until the red lights stop and it is clearly safe before crossing.