It's established that the interaction between human drivers and autonomous vehicles is a fundamental issue facing developers of autonomous technology. 

One of the key aspects of human / autonomous interactions is how each deal with the unspoken rules of the road, which are very difficult to replicate without human behaviour. This leads to an equally difficult issue of attitudes of human drivers to autonomous vehicles, and whether 'aggressive' drivers may be a hindrance to the smooth progression of autonomous vehicles sharing the roads with human drivers. 

The article below provides interesting insight into the potential difficulties in dealing with differing attitudes towards autonomous vehicles and makes the striking point that some drivers may see autonomous cars as easy prey!

It is also interesting to note that the research suggest UK drivers are more cautious about autonomous vehicles than their European compatriots.