Working in NJ I can confirm that it's a law hardly ever enforced. Cutting across parking spots in a mall parking lot is very common and dangerous. Back on topic, I think this highlights why I think fully autonomous cars only work if all of the cars are driverless. There is no way to predict illogical behavior by human drivers. It won't take long for human drivers or pedestrians for that matter to learn how to "game" the autonomous cars. I am smart enough to know not to step in front of a NYC taxi since there's a 50/50 shot the guy runs me over. If it's an autonomous car and I know it's programmed to stop I would be much more likely to step in front of it to cross the road. Same goes for changing lanes while driving. If I need to get over and I know an autonomous car will stop if I cut in front of it I'm much more likely to make that move than cut in front of a human driver. I think it will be hard for the people in autonomous cars in traffic to have their cars continuously stop while bad human drivers and pedestrians cut in front of them.