to Joliet was added to the National Register of Historic Places on May 5, 2006, and travels through mostly agricultural land, although the area also includes the former Joliet Arsenal. This segment of Route 66 runs through Joliet, Jackson, Wilmington and Florence Townships in Will County. It begins in Wilmington and ends just short of the I-80 interchange in Joliet. Several structures along this section are included in a National Register listing. Contributing structures to the listing include one bridge, one overpass and four concrete box culverts. The three-span, continuous steel multibeam bridge, in the northbound lanes, dates to 1950 and features concrete balusters and top rails. The box culverts were built as part of the 1926 road's foundation and range in width from . There are also four non-historic bridges constructed during the 1970s and 1980s along this stretch of US 66. Currently, IL 53 coincides with Route 66 through Joliet. North of Joliet, the early roadbed was four lanes wide by 1936. It passed by the notorious Stateville Penitentiary, then in unincorporated Joliet but now in Crest Hill ever since that suburb was created. After IL 53 splits to the north in Romeoville, the road is signed only as Historic US 66. The later alignments rejoin this original path at Welco Corners, an early crossroads now part of Bolingbrook that by the 1920s had added a truck stop and other motorists' services. 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. From south to north, these include the Beaux Arts style Joliet Union Station by Jarvis Hunt; the historic Church of St. Anthony, the oldest public building still in use in Joliet; the endangered St. Mary Carmelite Church by Patrick Keely; the Joliet Public Library, designed by Daniel Burnham; the restored Rialto Square Theatre, one of the few surviving movie