When this path was bypassed by the redirected US 66 in 1940, it became Alternate US 66, following Chicago Street through the central city on the east bank of the Des Plaines River and Broadway on the west bank. Decades later, even this business route split through the central city into northbound lanes on Scott Street and southbound lanes on Ottawa Street, with the split rejoining on Chicago at Columbia Street before crossing the Ruby Street Bridge to the west bank and onto Broadway, going north toward Crest Hill. All three of these north–south downtown streets offer a number of important historical structures for travelers to visit.