Interstate 294 (I-294) is a tolled auxiliary Interstate Highway in the northeastern part of the U.S. state of Illinois. Forming the southern portion of the Tri-State Tollway in Illinois, I-294 runs from South Holland at I-80/I-94 and Illinois Route 394 (IL 394) to Northbrook at I-94. I-294 is 53.42 miles (85.97 km) long; 5.32 miles (8.56 km) are shared with I-80. It serves as a bypass around the city of Chicago. I-294 is also the longest auxiliary route of I-94, at 10 miles (16 km) longer than I-494 in Minneapolis–Saint Paul. In addition, the tollway is the longest auxiliary Interstate Highway in Illinois, and it intersects the most primary Interstate Highways at six.
Illinois Route 19 is a major east–west arterial state highway in northeastern Illinois, United States. It runs from Illinois Route 25 in Elgin, to Lake Shore Drive on the north side of Chicago. Illinois 19 is 33.64 miles (54.14 km) long. For much of its length, it is also known as Irving Park Road and Chicago-Elgin Road.
Illinois Route 21 is an arterial north–south state highway in northeastern Illinois. It runs from Illinois Route 43 in Niles to U.S. Route 41 north of Gurnee. Illinois 21 is 28.13 miles (45.27 km) long.
Illinois Route 53 (IL 53) is an arterial north–south state highway in northeast Illinois. IL 53 runs from Main Street west of historic U.S. Route 66 (US 66) in Gardner to IL 83 in Long Grove, a distance of 82.02 miles (132.00 km). It mainly cuts through the western suburbs of Chicago, passes through Bolingbrook, Romeoville, Crest Hill and Joliet, merging into I-55 at Gardner.
Illinois Route 131 is a north–south state route in northeastern Illinois. It extends south from Wisconsin Highway 31 and Lake CR A1/19 at the Illinois/Wisconsin state line by Pleasant Prairie, south to Illinois Route 176 in Lake Bluff, a distance of 15.15 miles (24.38 km).
Illinois Route 171 (IL 171) is a 38.61-mile-long (62.14 km) north–south state highway in northeastern Illinois. It runs from U.S. Route 6 (US 6) in Joliet north to Illinois Route 72 at the Chicago–Park Ridge border. The section of IL 171 on Archer Avenue from Joliet to Summit is historically significant, originating as a Native American trail, and later serving for a time as part of the first numbered highway between St. Louis and Chicago.
Illinois Route 56 is a 32.52-mile-long (52.34 km) east–west state highway in northern and northeastern Illinois. It runs from the interchange of Illinois Route 47 at U.S. Route 30 in Sugar Grove east to US 12/US 20/US 45 by Bellwood.
Illinois Route 22, also known as Half Day Road for part of its length, is an east–west state highway in northeastern Illinois. It runs from U.S. Route 14 in Fox River Grove to U.S. Route 41 in Highland Park. It travels a distance of 19.7 miles (31.7 km) and is one of the few roads that runs almost entirely across southern Lake County while also providing access to southeastern McHenry County. Throughout its length, it shifts between two and four lanes as it passes through a frequently changing setting of scenic forestry and smaller populations, as well as busy intersections and larger developments.
Illinois Route 60 is a 17.22-mile-long (27.71 km) east–west state highway in Lake County, in northeastern Illinois. It connects the village of Volo at Illinois Route 120 just east of Illinois Route 59 with the city of Lake Forest at U.S. Highway 41.
Illinois Route 120 (IL 120) is a major east–west state highway in northeastern Illinois. It runs from U.S. Route 14 near Woodstock to Illinois Route 131 in Waukegan. It travels a distance of 34.62 miles (55.72 km) and is one of the few roads that provides direct access from McHenry County to Interstate 94 in Lake County. Throughout its length, it shifts between two and four lanes as it passes through a setting that consists of open rural areas, as well as larger developments and heavy congestion.
Illinois Route 59 is a north–south state highway in northeastern Illinois. It runs south from Illinois Route 173 in Antioch to I-55 in Shorewood, spanning the north–south width of Chicago's western suburbs. This is a distance of 71.13 miles (114.47 km).
Interstate 290 (I-290) is an auxiliary Interstate Highway that runs westward from the Jane Byrne Interchange near the Chicago Loop. The portion of I-290 from I-294 to its east end is officially called the Dwight D. Eisenhower Expressway. In short form, it is known as "the Ike" or the Eisenhower. Before being designated the Eisenhower Expressway, the highway was called the Congress Expressway because of the surface street that was located approximately in its path and onto which I-290 runs at its eastern terminus in the Loop.
Lake Street is an east–west street in Chicago and part of its suburbs. A portion of Lake Street is designated as U.S. Route 20. Lake Street begins in downtown Chicago and travels west to the eastern terminus of the Elgin Bypass around suburban Elgin. The street travels west through the city and then begins to travel in a northwest fashion through several suburbs. The street is a distance of roughly 34.4 miles (55.4 km).
Illinois Route 137 is a 23.49-mile-long (37.80 km) state highway in northeast Illinois. It runs from the Wisconsin Border north of Winthrop Harbor south to North Chicago, west to Libertyville, and then back northwest to Grayslake, terminating at IL 83 just south of IL 120.
Illinois Route 176 (IL 176) is a 41.28-mile-long (66.43 km) east–west state route in northern Illinois. It runs from IL 23 in Marengo to the southern terminus of IL 131 in Lake Bluff.
U.S. Route 30 (US 30) is an east–west arterial surface road in northern Illinois. It runs from across the Mississippi River from Clinton, Iowa, to Lynwood at the Indiana state line. This is a distance of 153.79 miles (247.50 km).
U.S. Route 12 (US 12) in the U.S. state of Illinois is an arterial highway that runs northwest to southeast through the Chicago metropolitan area. It enters Illinois at the Wisconsin border north of Richmond, and exits into Hammond, Indiana, from Chicago near the foot of the onramp to the Indiana Toll Road ; as it exits Illinois, the route is also concurrent with US 20 and US 41. Within Illinois, US 12 runs for a distance of 85.14 miles (137.02 km).
Interstate 94 (I-94) generally runs north–south through the northeastern portion of the US state of Illinois, in Lake and Cook counties. It is signed east–west in Illinois in accordance with its general alignment across the country, with west signage aligned with northbound travel and vice versa. I-94 in Illinois is 61.53 miles (99.02 km) long.
U.S. Route 41 (US 41) in the U.S. state of Illinois runs north from the Indiana border beneath the Chicago Skyway on Indianapolis Boulevard to the Wisconsin border north of the northern terminus of the Tri-State Tollway with Interstate 94. It is the only north–south U.S. Route to travel through a significant portion of the city of Chicago, carrying Lake Shore Drive through the central portion of the city along the lakefront. US 41 in Illinois is 64.81 miles (104.30 km) in length.
Illinois Route 63 (IL 63) was an east–west state highway in the Chicago metropolitan area. At its latest routing, it traveled from Illinois Route 72 (IL 72) in East Dundee to US 41 in Gurnee.
IL 59 in Lake Villa 
US 45 in Lindenhurst 
I-94 Toll in Gurnee 
US 41 in Gurnee
IL 131 in Waukegan 
