You’re driving on a motorway. What should you do if there’s a red cross with flashing red lights on the gantry above your lane?

Explanation: The lane under a gantry signal showing a red cross with flashing red lights is closed to traffic. You shouldn't proceed past that point in that lane. Should other lanes be open, move to a different lane and proceed with care. If red signals are shown above all lanes, then all lanes are closed: you must stop and wait for the lights to change or until you're directed to move.

Category: Band 2 traffic signs and signals

References: The Official DVSA Guide to Driving: Section 11, Highway Code: Rule 258, Know Your Traffic Signs: Page 89