A 1.4-mile section of Interstate 81, or the Viaduct, in Syracuse, N.Y., is nearing the end of its service life. The elevated highway separates the downtown from a bustling academic and medical area, and some see replacing it as a chance to "re-think and re-plan." As usual, money is the issue. It would cost $500 million to repair, but as much as $1.9 billion if an alternative option were chosen, according to the New York State Department of Transportation commissioner. This article looks at several possible alternatives designed by Syracuse University students.