[gambiting]

No, actually I think that long time before autonomous cars are common, or anyone even thinks about banning manual cars, vast majority of cars on the market will be already equipped with systems preventing accidents. There will be no reason to ban manual cars, because manual cars will be nearly impossible to crash, unless you specifically want to crash(and I bet you will be able to do that in an autonomous cars too since I can't imagine it won't have some sort of manual override).

Also, just to address your last point - why would manual driving cause increase in killings? In the worst possible case, it would stay at the same level as now,no? In fact, it's hard to argue that it won't get better, because autonomous cars will avoid dangerous situations caused by manual drivers better than humans would.

In other words - in increasingly autonomous environment, the risk factor of manual drivers will go down, not up.