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3. Get off the highways -- but beware the Blue Highways.Unless you have a specific destination and a strict schedule, there is little point in hitting the roads to see the country if you don't spend some time on the back roads. However, some "blue highways" (as certain back roads were called in the popular book by William Least Heat-Moon) are not much more than endless strip malls. Most U.S. road maps have some indicator of whether a "back road" is an interesting one; the map I use most has small red dots along those roads recommended as scenic routes. I have found these recommendations to be fairly reliable; most have at least a few miles of interesting local scenery, offer driving experiences ranging from a rambling bucolic feel to truly stunning views of America the Beautiful, and pay off handsomely for those with the time, patience and inclination to wander a bit. However, that being said...

4. ...have an escape plan to get off country roads.When I was a kid, my family took a trip down the East Coast by cutting inland to take the Skyline Drive. The Skyline Drive is certainly beautiful and occasionally visually stunning, but after a few official overlooks and an intensifying bout of car sickness on the winding roads, the kids in the car were ready to come down from the hills. It was also fantastically slow going; average speeds were about 35 m.p.h., which, starting in New Jersey, gets you to Florida in about four days of 10-hour drives. After about 600 sharp turns surrounded by a whole lot of trees and mist, I-95 never looked so good.