With people, yes.
With robots, perhaps not.
If you think of a collision as "someone doing something wrong" (as the police do) then a robot car can't really be responsible for a collision because all it can do is follow its programming. It's literally impossible for it to be 'careless' or 'dangerous' in the same way that a human driver can. Consequently, any accident between two robot cars will always have to share responsibility between the two owners (or possibly the manufacturers, but that's highly unlikely). It'd be exactly the same as if two human-driven cars hit each other in blameless circumstances today - the costs are just divided equally, or each car's insurer pays for the damage to that car, or something.
Robot cars will massively disrupt the insurance industry.