I can vouche for spy-d, I'm a commercial driver and HAVE been pulled over for 'stacking up a line of cars and not pulling over to let them pass' granted there was NOWHERE to pull over on a 2 lane road in the mountains.
IDK spy-d maybe its just a NOR CAL thing. As a commercial driver up here we all have to deal with it regularly. Having to pull over up a tough climb and come to a stop then try and start up the hill again. BS Law if you ask me.
Not cop bashing, just trying to help.