I was just wondering today about this. On motorway roadworks, you usually see signs that say "free recovery-await assistance" or something similar to that.
So if you break down, do you just sit at the side and wait? How often do trucks patrol the area? Or do they spot you on the cameras? How do you know if someone is coming?
And when someone does arrive, how do you know it's an official recovery person, and not some dodgy bloke in a truck with evil intentions?