Red X - National Highways
The Red X sign is key to supporting safety on motorways. It tells you when a lane is closed, helping any drivers and their passengers who may have got into difficulty. It also provides a safe place to work for the emergency services, recovery operators and our road workers.
Don't ignore the Red X – emergency services issue warning
Increasing the speed limit won't get traffic moving faster
Smart motorways - what are they and how do you use them?
Driver risks lorry collision after ignoring Red X
Drivers could face £100 fines for driving in red X smart motorway lanes, including on M3 - HampshireLive
National Highways warn drivers: Don't ignore the Red X' - Diamond
Do you know what to do when you see a red X?
Smart Motorway - Roader's Digest: The SABRE Wiki
Smart Motorway - Roader's Digest: The SABRE Wiki