Jam
If we ever reached the point of having reliable 100% autonomous vehicles, well something struck me. At the moment, if you're stuck in traffic, you have a look around and see how many cars - taking up a load of road space - have only one person on board. Well if cars can drop people off right outside work and then go home or go elsewhere to park, we're going to have a load more vehicles taking up road space that have no people at all on board.
