I have wondered how autonomous cars are supposed to handle a scenario where common sense dictates a slight violation of the traffic rules. For example, let's say that you're on a long, narrow road in the mountains where passing is forbidden for many miles. If there's a slow vehicle in front of you, such as a cyclist or a tractor, normally you wait for an opportunity for a safe pass and you take it. An autonomous car however, would just follow it, costing you many minutes of your time.