Of course .. one can envision a time when enough AVs exist for there to be “AV lanes” on highways that can tolerate the higher traffic densities only possible for a fleet of AVs. Not likely today of course, but I dont see any barrier to such things down the road.If a system needs to monitored by humans it needs to drive within the safety envelope of humans. Once you remove the human then you can push the safety envelope. You also don't want to cause panic in other drivers so to really push it you need to remove all human drivers from the road.