The situation I'm keen to see is how self driving cars deal with single track roads with passing spaces (which are pretty common in the wilder parts of the UK, e.g. Scottish Highlands) - if there is a conflict the general rule used by locals is that the car that can most easily reverse back to a parking space does so.

NB I'm sure "proper" behaviour can be programmed - I'm just keen to see it! (And who waives if it is a self driving car?)