1. Ciotti will have to answer this one...
2. 30 mph
3. Only seen one, EVER - and it was working traffic while a tow truck was a extricating a 911 over the side. I run the road often.
The speed limit on "The Snake" is the same as on "The Dragon". About 1/1000th the LEO presence. There's now a photographer on the road, so you can get good pics of your car if you're into that.