You also get a rolling roadblock when they're trundling along the motorway at 60 and nobody will go past because they think it's a Police car and they'll get arrested. Not sure if they have these Highways Agency vehicles in Scotland though?
No - we have BEAR Scotland guys in Transit or Sprinter vans who deal with cones etc - they look nothing like police vehicles , although do often have large matrix signs on the roof to warn of breakdowns, lane closures etc .
Thankfully , police motorway patrols are a regular sight on our roads , along with unmarked Corsas and Audi’s which take people by surprise.
Besides the well known safety camera vans , which tend to be easily spotted , traffic cops looking for speeders can at times be a bit more stealthy in their locations ( as our old friend *** found to his cost , but he was a tad over even 80 mph on that occasion ) .
AIUI , the ACPO 10%+2mph guideline is used here also : from personal experience the only two motorway tickets I’ve had down the years were for 82mph ( police ) and 84mph ( camera van ) .
I still do moderately high miles , although nothing like in years gone by , and my experience, both North and South of the border is that most people stay reasonably close to the limits .
I used to enjoy driving fast when I was younger : these days there’s too much traffic and the chances of getting caught are too great due to so many high tech enforcement devices , so I don’t do it .