This might be the solution: attach to the roof or roll bar for swift activation if the car breaks down on a smart motorway....

https://www.amazon.co.uk/dp/B082F4S...HG8F662T27GTMYE?_encoding=UTF8&psc=1

Probably illegal, but it might attract the Highways people more quickly than anything else. I'd prefer Blue and Red, but that would really upset the authorities....

Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...