The optimistic consensus is that the autonomous car will likely be shared, smaller, lighter, slower, and there will likely be about a tenth as many of them. Rachel Skinner of WSP|Parsons Brinckerhoff and Nigel Bidwell of Farrells, both UK consultancies, are in the Optimistic camp, with a capital O. They have prepared a fascinating study, Making Better Places: Autonomous vehicles and future opportunities.