Route 755 was a proposed state highway entirely in the city limits of St. Louis, Missouri which was never built due to local objections. Its northern terminus was to be at an interchange with Interstate 70 (I-70) in the northeastern part of the city and its southern terminus was at an interchange with I-44/I-55. It would have had an interchange with I-64/U.S. Route 40 along the way. The road was proposed as a freeway bypassing the downtown area of St. Louis and would have provided the currently-missing connections of northbound I-44/I-55 to westbound I-64 and eastbound I-64 to westbound I-44/I-55 or westbound I-70. It also was to be signed Interstate 755, or I-755.