At most protected level crossings a light signal unit is mounted beside the road. A single steady amber lamp shows first, then two red lamps flash alternately until it is safe to cross.
The flashing red pair is a legal stop signal and driving past it is an offence as well as a serious safety risk.
What this sign means
Steady amber means stop unless you are already so close to the crossing that stopping would be unsafe. Flashing red means stop and do not cross under any circumstances.
An audible alarm sounds at many crossings while the lights are showing, and half barriers will lower shortly after the reds begin.
What to do when you see it
Stop behind the white line and wait. The lights control the crossing, not the barriers.
- Stop at the white line on amber or red.
- Wait for the red lights to go out, not just for the barrier to move.
- Expect a second train if the reds continue flashing after one has passed.
- Do not creep forward while waiting.
How this sign is tested
The most common question describes a train that has just gone through while the red lights carry on flashing, and asks what you should do. The answer is always to continue waiting.
Others test whether you know that amber at a level crossing does not carry the same meaning as amber at a junction.
Common mistakes
Moving off the moment a train clears the crossing without checking the signals.
Following the vehicle in front over the line without confirming the lights for yourself.
Test yourself on this one
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Practise road sign questionsFrequently asked questions
Are the red lights at a level crossing a legal order?
Yes. Failing to stop is an offence and carries penalty points as well as a fine.
What if the lights come on while I am on the crossing?
Keep going and clear the crossing straight away.
Why is there an alarm as well as lights?
The alarm alerts pedestrians and drivers who may not be looking directly at the signal head.