I had to drive over Homestake Pass (an engine and transmission destroyer) in Montana while driving an old and overloaded car in July 2023. Your navigation program needs to have alternative routes built into it to choose from that are easier on a vehicle. I suggest you build that into the route planning. Use embedded AI if need be. If your software could ask the age and condition of the vehicle, it could using that information, suggest less troublesome routes. Am fortunate to be able to improvise. I pulled the car over to the shoulder, and let AAA tow me into Butte, Montana. No problem after that in driving back to Seattle.