Road maps
We use Rand McNally Trip Planner program. It has a feature called "road sense" that when run, allows you to avoid mountain passes, toll roads, tunnels, congested metro areas etc. If you are on the internet when you run it, it updates current construction etc.
The program will also route you around the undesired areas. References on the listed itinerary from the computer are matched with pages from the Rand McNally Road Atlas.
Works pretty well. We are putting it to the ultimate test in two days when we leave NE Georgia for a trip to Bangor, Maine, avoiding congested metro areas. Keep you fingers crossed for us.