St. Louis to Hamel as it leaves
St. Louis,
Missouri. The bridge bends at a 22° angle. In 1967, it was closed to automotive traffic. Entering
Illinois from
St. Louis,
Missouri, the highway originally crossed the
Mississippi River at the
McKinley Bridge. This first alignment passed through
Venice and
Madison, eventually becoming
IL 203 in northeast
Granite City. In 1930, the
Chain of Rocks Bridge was opened on
Bypass US 66, allowing travelers to circumvent St. Louis. This route met the original Route 66 in
Mitchell. The Luna Cafe, Bel-Air Drive-In sign, and the Old Greenway Motel can be found along this stretch of road, as well as The Mustang Corral, a
Ford Mustang shop, just before
IL 157 on the right hand side eastbound. Route 66 joined IL 157 through
Hamel via
Edwardsville. Congestion at the McKinley Bridge was reduced in 1951 with the construction of the
Veterans' Memorial Bridge. Route 66 joined
US 40, traversing
East St. Louis and
Fairmont City. Shortly after Fairmont City, Route 66 passed
Cahokia Mounds, later a
UNESCO World Heritage Site. It joined IL 157 on the western end of
Collinsville, later navigating to modern day I-55 via
IL 159. This stretch of Route 66 met the main route in Hamel.
Poplar Street Bridge was opened in 1967 to facilitate I-55,
I-64, and
I-70. US 66 and US 40 were both simultaneously rerouted over this newer bridge instead of the Veterans' Memorial Bridge.
Hamel to Springfield Original route U.S. Route 66 originally followed IL 4 north of Hamel. This alignment navigated through
Staunton,
Sawyerville,
Benld,
Gillespie, and
Carlinville to
Nilwood. The section of US 66/IL 4 from Nilwood to
Girard was listed on the National Register of Historic Places on May 23, 2002. A new alignment of Route 66 headed northeast of Hamel through
Livingston. This new section bypassed Mount Olive to the northeast, later running west of the old route through Litchfield before rejoining the original path. Sections of the older alternate route were destroyed during the 1930s when
Lake Springfield was created; the fragments of the old route that remain were added to the National Register of Historic Places on May 12, 2009.
Springfield to Gardner From Springfield to
Gardner, Historic US 66 is now a parallel frontage road for I-55, except for
business loops for
Lincoln and the
Bloomington-
Normal area. US 66 originally continued north through Springfield past the
Illinois State Fairgrounds and the
Lazy A Motel. The route rejoined IL 4 and continued alongside
Carpenter Park; a small section of this route is listed on the National Register of Historic Places on May 9, 2002. is made. From there, Route 66 entered Bloomington, passing through the
Central Business District and the
McLean County Square. Further north as Bloomington gave way to
Normal, the route passed
Illinois State Normal University. From Normal, Route 66 continued northeast through
Towanda, where there is now a parkway and bike trail along a stretch of the abandoned highway, with exhibits that highlight all eight states through which Route 66 travels. There are also classic "
Burma Shave" signs displayed along the trail. Route 66 traveled through
Lexington and
Chenoa to
Pontiac. Passing by the
Illinois State Police Office, the route continued northeast through
Cayuga and
Odell to
Dwight. A restored
Standard Oil Gasoline Station still stands in Odell, as does
Ambler's Texaco Gas Station in Dwight. The stretch from Cayuga to Chenoa was added to the
National Register of Historic Places on July 23, 2007. This section of US 66 was commissioned in 1926. The road segment travels from the northeast to the southwest and begins in the southeast corner of Odell Township in Livingston County and ends in the northwest corner of
Chenoa Township in
McLean County. US 66 passes through
Odell,
Esmen,
Pontiac,
Eppards Point, and
Pike townships, on its stretch from Cayuga to Chenoa. The road is paralleled on its east by the
Union Pacific Railroad tracks and on its west by I-55. Portions of the northbound and southbound lanes still carry traffic; in spots where one of the sections is still in use the other section is abandoned but still extant. 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. 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 palaces of the more than 400 designed by
Rapp & Rapp; the Georgian Revival
Louis Joliet Hotel, transformed into apartments but still an unfinished renovation project; the Neoclassical
Old Joliet Post Office; the Auditorium Building block by G. Julian Barnes, a classic Joliet limestone building; the
Joliet Area Historical Museum, which occupies another Julian Barnes building, the former Ottawa Street Methodist Church; the Italianate style Joliet Chamber of Commerce Clubhouse, now the JJC Renaissance Center, and the old
Joliet YMCA across the street, both designed by Burnham Brothers; two Art Deco structures, the Public Service Building on Ottawa and the KSKJ Building on Chicago Street further north; and the magnificent Bedford limestone St. Joseph Church, designed by Burnham protege
William J. Brinkmann and the largest church in the city, whose twin spires could be seen for miles around when Route 66 was new. There are also at least two pop-culture points of interest. One is just north of downtown Joliet, not far from the city center campus of
Joliet Junior College. Sherb Noble opened the first
Dairy Queen on June 22, 1940, at 501 N. Chicago Street in Joliet. Although the shop closed and the last
soft serve ice cream was sold in the early 1950s, the building was designated a local landmark in November 2010. Across the river at the south end of Route 66 Park is the Rich & Creamy ice cream stand on Broadway, easily recognized by the statues of Elwood and Jake Blues, the
Blues Brothers, posed on the roof. This classic stand is open for business from mid-spring through late fall, depending on the weather, and is a welcome stop on the tour.
1940 route through Plainfield The new western route was opened in 1940 and began in Gardner on the other (west) side of the Southern Pacific railroad tracks, taking over portions of
IL 59 and
IL 126. Its main purpose was to bypass Joliet. This route also served Braceville, Godley, and Braidwood but then curved north to
Channahon,
Shorewood, and
Plainfield, rejoining the original route at Welco Corners. In Plainfield, this new route overlapped
US 30 (
Lincoln Highway) for a short distance. After this road was opened, the original route through Joliet was redesignated as Alternate US 66. Between Gardner and Braceville, a magnificent through-arch bridge carried this alignment of Route 66 over railroad tracks; unfortunately it deteriorated beyond repair and was demolished in 2000. Beyond Braidwood, motorists can follow this 1940 alignment on
IL 129, I-55, IL 59, IL 126, and I-55 again.
1957 freeway route In 1957, a new
freeway, which is today's I-55, was opened as US 66 between Gardner and Welco Corners, bypassing both Braidwood and Plainfield. Most portions of the 1940 western alignment that were not incorporated into the new freeway reverted to their previous state routes, except for the section from Gardner through Braidwood, which became IL 129. This freeway was originally designated only as US 66 and was then also designated as I-55 in 1960, becoming the first complete section of I-55 in Illinois. It served as mainline US 66 for 19 years, from 1957 to 1976, longer than either of the two previous alignments. Between 2007 and 2008, the section of I-55 between I-80 and Welco Corners, originally built as the redirected path of US 66 in 1957, was rebuilt and widened to three lanes in each direction to accommodate modern traffic loads. However, between I-80 and Gardner, I-55 today remains mostly as it was as US 66 in 1957. This heritage is evident, with fully mature trees in interchange medians, several 1957-era motels and gas stations still in operation, and several original bridges still in use, such as the Smith Bridge over the
Des Plaines River and the nearby Blodgett Road overpass.
Welco Corners to Chicago From Welco Corners in Bolingbrook to
Indian Head Park, I-55 was built on top of much of old US 66. Here, Route 66 passed through what is now
Woodridge,
Darien,
Willowbrook, and
Burr Ridge—none of which were in existence in 1926 when the route was created and did not come into existence as suburbs until the late-1950s through late-1960s. The stretch from Darien northeast through what is now Countryside and
Hodgkins was then part of a large rural farmland collectively known as Lyonsville, as the eastern end of it was located in
Lyons Township in
Cook County. This section of mainline I-55 is today signed as Historic US 66, though inconsistently so, making it difficult for travelers to follow along the original 1926 path; however, a section of the original highway that now serves as the two-way north frontage road in Darien, Willowbrook and Burr Ridge retains the old Route 66 feel. The original path is slightly difficult to follow here, due to swings north around the I-55 interchanges between Lemont Road and County Line Road, but not impossible, and taking the north frontage road leads travelers past several sites of historic interest, including Cass Cemetery and the former Martin B. Madden mansion known as Castle Eden (now a
Carmelite priory) in Darien as well as the
International Harvester experimental fields in Burr Ridge (once known as Harvester, Illinois after the plant located there). Near the Cass Avenue instersection, Route 66 and I-55 pass by the northern edge of the
Argonne National Laboratory campus. A mile or so further east near the IL 83 interchange,
Dell Rhea's Chicken Basket in Willowbrook is still a popular stop for motorists on the route, although being cut off from the Interstate did cost it a significant amount of business after I-55 was built and during the 1960s through 1980s. At the
Indian Head Park interchange with
I-294 (
Tri-State Tollway), I-55 separates from US 66 to follow a more southerly route as the Stevenson Expressway while Historic US 66 continues eastward on Joliet Road, passing by the historic Lyonsville Congregational Church at Wolf Road and traversing
Countryside, Hodgkins, and
McCook. The original path of Route 66 on Joliet Road intersects the overlapping
US 12/
US 20/
US 45 at LaGrange Road in Countryside before touching the edge of Hodgkins near East Avenue. A brief stretch of Route 66 in McCook between East Avenue and 55th Street west of First Avenue has been permanently damaged by a local quarry and was closed in May 1998, and Historic US 66 detours onto East Avenue north to 55th Street east before intersecting again with Joliet Road. The detour around the quarry is well marked. In McCook, the route passes by the former Snuffy's 24-Hour Grill, now restored and transformed into the Steak N Egger on Route 66. The route continues northeast on Joliet Road through McCook and
Lyons, then jogs north briefly onto
Harlem Avenue to
Ogden Avenue in
Berwyn, where it meets
US 34. From Berwyn, Route 66 continues northeast on Ogden Avenue past the
Berwyn Route 66 Museum, passing through
Cicero before entering Chicago on a diagonal and progressing through the Greater Lawndale area, where it divides
North Lawndale from
South Lawndale before moving through
Douglass Park, the Tri-Taylor Historic District and the
Illinois Medical District on the
Near West Side. Turning due east from Ogden Avenue once north of the
I-290 (Eisenhower Expressway), Route 66 moves through the
Jackson Boulevard Historic District toward the
Chicago Loop via Jackson Boulevard. After a construction project during the early- to mid-1950s temporarily designated Jackson Boulevard as one-way east, Jackson Boulevard became one way eastbound permanently in 1955; thus, Route 66 from the West Loop through the downtown area was split, with the westbound lanes relocated to Adams Street. The eastern endpoint of US 66 was always at
US 41. The original 1926 terminus was at Jackson Boulevard and
Michigan Avenue, as Michigan Avenue was designated US 41 in 1926. ==Major intersections==