Confession time: Many years back I went to the V Festival in my truck, mainly because I was carrying more than one passenger but also because I knew the field was boggy after rain. Parked up with everyone else. Come leaving time, you can imagine the chaos that ensues when people ignore road ways or common politeness.
Well, after about 20mins of going nowhere fast I simply lit up the obstruction lights on the roof and watched as the sea of cars parted in front of me I felt like Moses, and navigated the rest of the car park in about 2mins flat. Completely legal, if a big cheeky.