The wide spacing of South Blvd. -- and the name of the undivided part of the road west of there: "Loop 90" -- leads me to think that the original plans for I-90 might have included locating this portion on a berm in between the South Blvd. lanes. Obviously, any such plans would have been scrapped in favor of what was eventually built. It also appears that the 4th Street E-W alignment was likely the original US 14/16 route, later bypassed.