What is the ANCAP rating for these? Cute they might be but they look to be quite flimsy in construction. Maybe that's one of the reasons why they are so slow, not just to avoid the risks of high speed impact but also so that they don't have to be tested right alongside the output of the rest of the automobile industry. That gives google time to perfect the software in a real world traffic without all the costs and co…
There is a tubular 'roll cage' type of thing going on with it, reminiscent of rally cars and kit cars. Given that rally cars have roll cages and normal cars do not, I for one look on a roll cage as a good thing, even if the rest of the box is prototype bits of plastic.
Part of a safety rating is the effect a car has on pedestrians. People can get killed by hood ornaments even at a relatively low speed. To date very few cars have been specifically designed with pedestrian safety in mind. One of the few was the Austin Metro and that was a long time ago. It does look as if the Google people have thought of pedestrian safety - it is a big part of the self driving concept and it also appears to be part of the implementation. I wouldn't be at all surprised if the final implementation of the driver-less car is in a whole new level of safety compared to regular cars with the difference being like the difference between 'tame' and 'wild' animals.