This made me laugh
In the leafy UK hamlet I drive through the average driving age is 150. Most of these elderly drivers are 3 ft high and get friction burns on the end of their noses from the steering wheel where they sit so close. I dread to think what would happen if the airbag deployed....
Anyway getting to 25 mph would be nice as no matter what time of day I drive I tend to get stuck behind them.
Then there's the state of the roads - potholes, worn out tarmac, non-existent road markings so I reckon if they brought the Google cars over here they'd all crash as they wouldn't be able to identify anything.