Cities are really not that dense. Harrisburg to Pittsburg is over 200 miles along the highway. From Albuquerque you could only get to Santa Fe or vice-versa, an

Cities are really not that dense. Harrisburg to Pittsburg is over 200 miles along the highway. From Albuquerque you could only get to Santa Fe or vice-versa, and then you're stuck. You'd be trapped in Salt Lake City or Denver too.