When I lived in Palo Alto, every single day I saw delivery vehicles parked in the middle of a lane in a 2-lane street. The police never seemed to do anything about it. I think we should encourage a culture of vigilante traffic enforcement. If someone leaves a car parked in the middle of the road because they were too lazy to park elsewhere nearby, they deserve to get their vehicle dinged up a little bit. Hopefully that might actually dissuade them from parking in the middle of the road.