Or you start going up towards a pass in winter in a vehicle not equipped to do so (awd/4wd, probably backup chains if you're by yourself, water, blankets or winter clothes enough to get you through 24 hours). Particularly with zero other traffic on the road so there's no one to flag down.

That the gps took them there sucks, but you need to be responsible for looking at the road and deciding if your vehicle can do it. Particularly in the mountains in winter. And be extra careful when you're approaching the half-way mark on gas, ie you can't get back to where you last saw a human. Going past that point means you're all in.

I drive to Tahoe all the time and the number of accidents you see because morons decide to zoom over mountain passes in their crappy civic with bald tires passing people in awd suvs with ski stickers on them (ie people who regularly drive in snow)...