I'm pretty sure I've seen Google's car being tested up in Tahoe, so the answer is some. (The areas around Tahoe's ski resorts get quite a lot of snow and ice to

I'm pretty sure I've seen Google's car being tested up in Tahoe, so the answer is some. (The areas around Tahoe's ski resorts get quite a lot of snow and ice too, so it's certainly a good place for this sort of testing.)