John, News Flash. Driverless cars won't relieve congestion because of roadway capacity. Congestion is caused when more cars are traveling on a road in a period of time than the road, or lane, than the road can accomadate. So when for example a lane is closed on H1 congestion happens when cars in that lane have to merge with still open lanes. Why is it so hard to understand that driverless cars will do nothing to relieve that congestion? The technology for mapping routes is already in existence and it is on my IPad. So it is mass produced and operating. It just does nothing for my commute. What's funny is to propose a technological solution, that even if it arrives, won't work for the problem. Even funnier that they don't know the key technology is already available and widely used.