I think that despite all the pros of the autonomous vehicles there are also some major drawbacks. First of all, lots of lorry drivers, taxi drivers etc. will lose their jobs, which may lead to unknown consequencies. Second, no system is absolutely secure - that means that autonomous vehicles can be hacked and used for terroristic purposes, for example. And the last, there is some joy in driving a car which will be gone with the autonomous vehicles (that makes me personally sad).