A level crossing is where a road crosses a railway or tramway line. Approach and cross it with care. Never drive onto a crossing until the road is clear on the other side and do not get too close to the car in front. Never stop or park on, or near, a crossing
If your vehicle breaks down, or you're involved in an incident on the crossing:
Driving - The essential skills - p 121
Open level crossings are much less common. They have neither lights nor barriers. Look both ways, listen carefully and proceed when it is safe to do so.