Re: If Google wants to limit the speed of their test cars/prototypes to 25 mph....
In most civilised countries it's:
Actual speed limit is determined by the greater of:
A: the posted speed limit
B: speed at which you can pull up in the distance of clear road ahead of you (halved if no center line)
Which means that 20mph on a motorway in heavy fog (sub 10 foot visibilty) is dangerously fast. I've been in fogs where you couldn't even see to the end of the bonnet and you effectively have to stop.
FWIW: 30mph is too fast in a residential or urban area, based on pedestrian survivability stats. 20mph is about right (and in many urban areas you'd have trouble maintaining that speed anyway)
That said: California has laws on the books about holding up traffic. Once you get a few cars building up behind you, you either speed up or pull over to let them past.
Biting the hand that feeds IT
