Over a short term, yes, but there's likely to be work done on co-operation + communication standards between autocars. If a cars at an intersection are all auto, a quick Raft election can decide who goes first, so they'll all get to go through much faster. Broadcasting intention can also help with overtaking, trailing, etc. And if road train standards get built in they can all run much faster and more efficiently on highways as well.
... and the roadway is not used/intersected by cyclists, pedestrians, or anything that isn't an autonomous vehicle...
I think this stuff is super promising, but it alarms me how often we forget that streets are used by more than motor vehicles. The fact that roads are used by a mixture of users is a feature, not a bug.
