I agree that traveling through cities on the Interstate may be no fun and does have some problems but I'm old enough to remember earlier times when one traveled through Houstin, Denver, Indianapolis etc. using surface streets and you can believe me NOBODY wants to go back to those days. Especially when you factor in the vast increase in traffic from then and now. I LOVE our interstate system and not many things I'd change about it. Passing through even the largest cities is usually accomplished in less than an hour. Give it a try sometime and jump off and go through on the surface streets and count your time and aggravation. EVEN without the many thousands of others who would be joining you without the system supporting their travels.