I-81 runs 855 miles from Knoxville to Canada. But one 1.4-mile stretch in Syracuse, NY could be a window to the future.

[youtube http://www.youtube.com/watch?v=k05S5Db1wxU&w=600&h=315]

Fun fact: Dwight Eisenhower's vision for the interstate system actually came from some roads he saw in Germany while a general. Communication lines got a bit crossed, though, and he didn't actually realize interstates would run through cities until a few years after the construction process…