I got caught in Norwood on a yellow box (so beware out there). I had entered a yellow box because I could see the traffic was moving and calculated I wouldn't be stuck there ? I actually stopped for about 5 seconds with my back wheels still in the box (it's all on camera) waiting a polite distance from the car in front to move forward. I was causing no obstruction. If I had known I was being filmed I could have closed up very tight to the car in front and got away with it :( but that isn't grounds for appeal, you have to keep moving apparently.