Motorway Rules: When to Slow or Stop

You should stop on a motorway:

If red lights show above every lane
When told to by the police
When signalled by a Highways Agency Officer
If you get puncture on the motorway you should use an emergency phone and call for assistance.

If you breakdown but can’t get to the hard shoulder you should turn on your hazard warning lights.

Continuous high speeds make vehicle breakdowns more likely.

In a contrflow system there are likely to be lower speed limits.