eh? exit, entrance or both?
Motorway/A-road junction, so the exit I wanted to take (from whichever A-road the sat nav was busy trying to send me down the wrong onto the M6 toll) way had become the car park for ~100 ‘politicaly correct non-V8 landrover ninety driving 16-35 year olds’.
demonstrating / blockading
That was my first thought, but then that would presumably make the news.
fast n furious style roadblock racing?
That was the 2nd, based on the the non landrover V8 driving demographic
But surely there must be a quiet industrial estate that while peeving the police off would at least attract less attention?