Those of you who drive through isolated areas, what happens if your car breaks down or gets a flat?

I know you’ll obviously be stuck there, but does that ever concern you? I mean, there‘s a lot of nice scenery in more rural places, but I’m wondering about driving through areas with no gas stations for the next 100+ miles type of thing. If you got stuck, how long would it be before a police car, highway patrol car, or anyone else drove by and stopped and called for help? Even if you tried calling and actually had cell service, how would you know exactly where on the road you are?