My wife has driven the suburban and then the Excursion a couple of times when we had our pop/ups and travel trailers, including one time when I passed out, but got it off the road safely first, and then she got us home.
She refuses to drive the motorhome...... We've had it 6 years now and doesn't even like to sit behind the wheel when it's running. She will sit there to do the light test, but I have to turn the key to acc. I am going to try to get her to try to drive it in an empty parking lot one day soon and hope for the best.
I am a retired school bus/tour bus driver and BY LAW, every time we took a group on any kind of a field trip, we had to give a safety briefing. Part of that briefing was what to do in case something happened to the driver when on the road. Y'all should teach your spouses at least that. 1. if you should pass out,etc, they should grab the wheel with one hand and shove you to the left, 2. show them where the E brake is and tell them to apply it. 3. take it out of gear, once stopped and turn off the engine . If your rig is a diesel, then the E brake will slow you rapidly and most likely in straight line. Don't worry about folks around you as your probably not gonna know what's happening anyway. 4. call 911 and tell them what's happening and that you're in the middle of the road.
