It seems to me that one of the biggest barriers to the driverless car revolution will be sharing the road with human driven cars. If there was a special road or

It seems to me that one of the biggest barriers to the driverless car revolution will be sharing the road with human driven cars. If there was a special road or lane just for driverless cars, I could see things moving much faster in that direction. The problem is that's a massive public infrastructure undertaking, and we all know how quickly those go...