On an international note: This is a very common accident in Jamaica and other Caribbean lands, where the natives often catch a few Zs on the carriageway after a hard night out. You see the air gets a little chilly, mon, at 3AM, and the tarmac is still nice and warm.
You can read all about it in my book, "The Yachtsman's Guide to the Comparative Utility of Various Caribbean Natives." $24.79 at booksellers ecerywhere.
Being Kristine's husband, another example of doing the jobs Americans won't do.