[Sunshine Sister]

I'll bet she fell asleep. I'm sorry for her family. What a tragedy.

[Billthedrill]

Beat me to it. The number of one-car accidents where alcohol is NOT involved is staggering, and when the autopsy shows no sign of anything, it's a fair bet that the driver simply fell asleep. It's almost happened to me on several occasions. Driving alone, you sometimes don't even notice it happening.