List of state routes in Illinois

From Wikipedia, the free encyclopedia
  (Redirected from List of Illinois Routes)
Jump to: navigation, search
Illinois Routes
Illinois Route 1 markerIllinois Route 78 markerIllinois Route 110 marker
Standard Illinois route markers
System information
Maintained by IDOT
Formed: November 5, 1918 (1918-11-05)[1]
Highway names
Interstates: Interstate X (I-X)
US Highways: U.S. Route X (US X)
State: Illinois Route X (IL X)
System links

The Illinois Routes are the highways in the State Highway System of the U.S. state of Illinois that are not simultaneously part of the Interstate Highway System or the United States Numbered Highway System. These highways are maintained by the Illinois Department of Transportation (IDOT).

History[edit]

Illinois's state route numbers originated in 1918 as State Bond Issues 1 thru 46, used to finance the new roads. The numbers of the bond issues were then used to mark the highway routes along the way. Another series of bond issues were authorized in 1924 (47–185) and again were used to mark the roads they paid for. After that the route numbers evolved into a separate system. The State Bond Issue numbers (SBI) remained as inventory designations on the original routes even after the numbered portion was changed, deleted or rerouted. These SBI numbers remain on IDOT district maps to this day and are used along with other designations for bid requests and other official documents.[2]

During the middle part of the 20th century the state numbered routes expanded to new roads around the state. When the United States Numbered Highway System was introduced in the late 1920s many of the new US Routes were already part of the state system and the US number was just added to signposts. During 1930s as the US Highway System matured, redundant state numbers were often removed from US Routes. During 1950s and into 1980s, as the Interstate Highway System started to supplant many US Routes, redundant numbers were removed or replaced with state numbers. After the original Interstate Highways were substantially completed in the early 1970's many state (and US) routes, especially in the Chicago metro area, were removed or shortened as unnecessary.[2]

While US and Interstate systems use even numbers for primary east–west routes and odd for north–south, there is no such rule for Illinois route numbers. Also, three-digit route numbers are usually not related to their one- or two-digit counterpart. There are several exceptions to this however.[citation needed]

General notes[edit]

Illinois has used route numbers from IL 1 thru IL 186 inclusive[2] as well as many others up to IL 594.[3]

Illinois has used letter suffixes on several state highways, including "A", "B". "C", "N" (for north) and "S" (for south).[2] A, B and C suffixes were used for spurs of a nearby route, the N and S were legs of IL 113 on either side of the Kankakee River.[4]

Illinois has also used special routes, such as "Business", "Alternate", "City", "Bypass" and "Truck" on state-numbered highways. Only a pair of truck routes as well as a batch of Business Routes remain in Illinois, all other special state highways have been renumbered or the markers removed.[5]

Primary routes[edit]

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
IL 1 322.48 518.98 KY 91 in Cave in Rock I-57 in Chicago 1918 current IL 1 was posted on what is now IL 394 from 1957 to 1964, the old road was Alt. IL 1 during that time
IL 2 73.91 118.95 IL 40 in Sterling WIS 213 in South Beloit 1918 current Originally Rockford to Dixon to Mendota to Cairo; replaced by US 51 south of Mendota
IL 3 187.44 301.66 I-57/US 51 in Cairo IL 100 in Grafton 1918 current Originally Morrison to Chester, replaced by other roads including IL 78 and US 67 north of the St. Louis area
IL 4 170.44 274.30 IL 13/IL 127 in Vergennes I-55 Bus. in Springfield 1918 current Originally Chicago to St. Louis, mostly replaced by US 66 except from Springfield to Staunton where IL 4 was used on the old road and US 66 on the new; IL 4 replaced the old IL 43 Staunton to near Murphysboro
IL 4A 1926 1967 Ran Chicago to Joliet along Archer Av., Replaced by IL 171
IL 5 15.78 25.40 US 67 in Rock Island I-80/I-88/IL 92/IL 110 (CKC) in East Moline 1972 current Originally Chicago to East Dubuque, replaced mostly by US 20 except near Rockford until that was replaced later by Business US 20; later used to replace IL 190 on the East–West Tollway until 1987 when it was replaced by I-88 east of I-80
IL 6 10.11 16.27 I-74/I-474 in Peoria IL 29 in Mossville c. 1971 current Originally Chicago to Fulton, replaced by US 40, later to become Alt. US 30 and now IL 38; applied to freeway extension of I-474 around 1982
IL 7 28.06 45.16 US 6 in Rockdale IL 43 in Worth 1918 current Originally Chicago to East Moline, replaced west of Orland Park by US 6 about 1928 then extended to Rockdale in 1969
IL 8 45.51 73.24 IL 97 in Maquon US 24 in Washington 1918 current Originally Gulfport to Sheldon, removed in parts and replaced by US 34, US 24 and other routes
IL 9 218.31 351.34 Iowa 2 in Niota SR 26/SR 352 in Hoopeston 1918 current Originally Hamilton to Cheneyville, replaced in part by US 136, IL 41 and IL 9
IL 10 91.35 147.01 US 136 in Easton US 150 in Champaign 1918 current Originally Jacksonville to Decatur, later extended to Danville and Havana
IL 11 Originally Terre Haute to St. Louis, replaced by US 40
IL 12 Originally Vincennes, IN to St. Louis, replaced by US 50
IL 13 151.54 243.88 IL 157/IL 163 in Centreville KY 56 in Old Shawneetown 1918 current Originally Old Shawneetown to St. Louis
IL 14 76.24 122.70 US 51 in Du Quoin SR 66 in Phillipstown 1918 current Originally DuQuoin to Carmi
IL 15 149.64 240.82 I-55/I-64/US 40/IL 3 in East St. Louis SR 64 in Mt. Carmel 1918 current Originally East St. Louis to Albion
IL 16 174.66 281.09 IL 100 in Hardin US 150/IL 1/IL 133 in Paris 1918 current Originally Paris to Litchfield, later extended west to Hardin; IL 316 replaced IL 16 after a new road was built from Mattoon to Charleston in 1962
IL 17 209.4 337.0 1st Street in New Boston SR 2 in Grant Park 1918 current Originally Lacon to Grant Park. Ferry at New Boston dropped in 1973
IL 18 39.01 62.78 IL 29 in Henry IL 17 in Blackstone 1939 current Originally Princeton to Chicago (Ogden Av.)
IL 19 33.64 54.14 IL 25 in Elgin US 41 in Chicago 1949 current Originally Chicago to Harvard on what is now US-14, moved to current route in 1949.
IL 20 Replaced in 1941 by IL 120 after confusion with the nearby US-20
IL 21 28.13 45.27 IL 43 in Niles US 41 in Gurnee 1918 current This is Milwaukee Ave. Originally Antioch to Chicago.
IL 22 19.7 31.7 US 14 in Fox River Grove US 41 in Highland Park 1918 current Originally the "22 Loop" around the Chicago metro area. It followed the current IL-22, then went to Crystal Lake via US-14, Aurora via IL-31 and Lynwood on US-30.
IL 22A 1924 1925 Became part of IL 63, which was deleted in 1973; Now IL 68
IL 23 126.17 203.05 IL 116 in Pontiac US 14 in Harvard 1918 current Part of it (Streator to Pontiac) was once IL 118
IL 24 1918 1940 Replaced by IL 29 by 1940
IL 25 35.04 56.39 US 34 in Oswego IL 62 in Carpentersville c. 1930 current Original IL-25 was Kankakee to Fairfield, replaced by US-45. Reused in the 30's on current route.
IL 26 139.35 224.26 IL 116 in East Peoria WIS 69 in Orangeville 1918 current Originally Freeport to Polo, extended north to the state line to replace IL-74 and south to Bureau then E. Peoria replacing IL-89 and IL-87 in part. Rerouted to the I-180 bridge in the 1990's due to a bridge removal over the Illinois River
IL 27 Was Savanna to Polo, Now part of US 52
IL 28 Was Sheffield to Galesburg, Now part of US 34
IL 29 175.36 282.21 US 51/IL 16 in Pana US 6/IL 89 in Spring Valley 1918 current Originally DePue to Peoria, extended in the 30's and 40's.
IL 30 1918 1941 Was Peoria to Galva, Replaced by US-150, IL-17, IL-78, US-34 and IL 91
IL 31 58.41 94.00 US 34 in Oswego US 12 in Richmond 1937 current Original route was Quincy to Canton, replaced by US-24, IL-78 and IL-100. Current route marked in 1937.
IL 32 69.32 111.56 US 40/IL 33 in Effingham IL 48 in Cisco 1918 current Originally Decatur to Windsor, extended to Effingham in 1936 then to Cisco in 1998.
IL 33 97.17 156.38 IL 128 in Beecher City US 50 in Lawrenceville 1918 current Originally Effingham to Gordon, extended to current route in stages.
IL 34 61.74 99.36 Hopkinton Street / Walnut Street in Rosiclare IL 14/IL 37 in Benton 1918 current Originally was a "T" Shaped route from Harrisburg to Elizabethtown and a leg south to Golconda and a ferry went to KY-297 across the Ohio River. Extended to Benton and to Rosiclare in 1937. Part of this is now IL-146.
IL 35 2.42 3.89 US 20 in East Dubuque WIS 35 in East Dubuque 1938 current Originally used from Mound City to US-51, barely 1 mile long, to serve a federal cemetery. This is now part of IL-37. Next used from E. Dubuque to the WI State Line, replacing IL-79.
IL 36 1918 1937 Replaced by IL 94
IL 37 155.07 249.56 US 51 in Cairo US 45 in Watson 1918 current
IL 38 89.28 143.68 US 52 in Dixon US 12/US 20/US 45 in Westchester 1918 current
IL 39 Now part of US 150
IL 40 1918 1937 became part of IL 88
IL 40 112.05 180.33 I-74 in Peoria IL 78 in Mount Carroll 1995 current Formerly IL 88
IL 41 37.53 60.40 US 136 in Adair US 34/IL 110 (CKC)/IL 164 in Galesburg 1918 current
IL 42 1924 1972 Ran from Chicago to Winthrop Harbor, part of it is now IL-173. Was the designation of Sheridan Road
IL 42A 1925 1967 Replaced by IL 43
IL 43 60.3 97.0 US 30 in Frankfort US 41 in Park City 1967 current Formerly IL 42A
IL 44 1940 Now part of US 52
IL 45 1936 Became IL 179 in 1936; IL 179 was deleted by 1995
IL 46 1938 Became in part US 45 from La Grange to Des Plaines[6]
IL 47 169.76 273.20 IL 10 in Seymour WIS 120 in Hebron 1924 current
IL 48 85.38 137.41 IL 127 in Raymond IL 54 in DeWitt 1924 current
IL 49 140.86 226.69 IL 33 in Willow Hill US 45/US 52 in Ashkum 1924 current Originally Willow Hill (Near Jasper) to Chicago
IL 50 66.49 107.01 US 45/US 52 in Kankakee US 41 in Skokie 1924 current
IL 51 Now part of US 45
IL 52 1938 Replaced by IL 83; Originally Lemont to Lynwood
IL 53 82.02 132.00 I-55 in Gardner IL 83 in Long Grove 1924 current
IL 54 109.35 175.98 I-55 in Springfield US 45 in Onarga 1972 current Formerly US 54; Originally Antioch to Lemont
IL 55 Now IL 56; Originally Chicago to Oak Brook
IL 56 32.52 52.34 US 30/IL 47 in Sugar Grove US 12/US 20/US 45 in Bellwood 1924 current
IL 57 12.59 20.26 I-172/IL 110 (CKC) in Fall Creek US 24/IL 104 in Quincy 1949 current
IL 58 28.3 45.5 IL 25 in Elgin US 41 in Skokie 1924 current
IL 59 71.13 114.47 I-55 in Shorewood IL 173 in Antioch 1924 current
IL 59A Replaced by IL 60
IL 60 17.22 27.71 IL 120 in Volo US 41 in Lake Forest 1967 current Formerly IL 59A
IL 61 44.77 72.05 IL 96 in Ursa US 136/IL 110/IL 336 in Tennessee 1924 current Originally Richmond to Crystal Lake on what is now IL 31
IL 62 20.82 33.51 IL 31 in Algonquin IL 83 in Des Plaines 1924 current Originally Algonquin to Chicago (Harlem Ave.) on Algonquin Road west of Des Plaines. In Des Plaines, this was on Oakton Street and then in Park Ridge, it was Talcott Road into Chicago. IL 62 originally ended at IL 43 (Harlem Ave.) In 1974, IL 62 was removed was removed east of IL 83 in Des Plaines.[7]
IL 63 1926 1973 Replaced in part by IL 21, IL 59, and IL 68
IL 64 136 219 US 52/Iowa 64 in Savanna US 41 in Chicago 1924 current
IL 65 1924 1971[8] Swapped routes with US 34
IL 66 Now IL 126
IL 67 1924 1940 Replaced in part by IL 176
IL 68 25.74 41.42 IL 72 in East Dundee I-94/US 41 in Glencoe 1942 current Originally Lake Bluff to Russell
IL 69 1940 Now part of US 52
IL 70 19.01 30.59 IL 75 in Durand US 20 Bus. in Rockford 1924 current Originally Durand to Mendota
IL 70A 1924 1938 Replaced by IL 170
IL 71 69.37 111.64 I-180/IL 29 in Hennepin US 34 in Oswego 1938 current
IL 72 110.71 178.17 IL 73 in Lanark IL 43 in Chicago 1924 current Originally Lanark to Starks
IL 73 29.32 47.19 US 52/IL 64 in Lanark Wisconsin state line near Winslow 1924 current
IL 74 1937 Replaced in part by IL 26
IL 75 41.64 67.01 IL 26 in Freeport WIS 67 in South Beloit 1924 current
IL 76 15.67 25.22 Business US 20 in Belvidere WIS 140 east of South Beloit 1924 current
IL 77 1917 1936 Replaced by IL 64
IL 78 215.51 346.83 US 67/Business US 67/IL 104 in Jacksonville WIS 78 near Warren 1924 current
IL 79 1917 1936 Replaced by IL 35
IL 79 1967 1981 Replaced by IL 336
IL 80 1964 Now part of US 150 and IL 84
IL 81 25.78 41.49 US 150 in Lynn Center IL 78 in Kewanee 1924 current
IL 82 28.84 46.41 IL 17 in Bishop Hill IL 92 north of Geneseo 1924 current
IL 83 92.22 148.41 US 30 in Lynwood WIS 83 north of Antioch 1941 current Originally Galva to New Boston on what is now IL 17
IL 83A 1924 1940 Now part of IL 17
IL 84 93.93 151.17 US 6 in Colona WIS 80 near Galena 1955 current
IL 85 Now part of US 67
IL 86 1937 Now IL 2
IL 87 1969 Now IL 26
IL 88 1995 Now IL 40
IL 88A 1938 Replaced partly by IL 17
IL 89 55.48 89.29 IL 116 in Metamora US 34 in LaMoille 1924 current
IL 89A 1938 Now part of IL 71
IL 89B 1939 Now part of IL 18
IL 89C 1939 Now part of IL 18
IL 90 15.8 25.4 IL 78 near Laura IL 40 near Edelstein 1924 current
IL 91 40.72 65.53 US 150 in Peoria US 34/IL 78 in Kewanee 1941 current
IL 92 106.41 171.25 Iowa 92 near Muscatine, Iowa US 34 in LaMoille 1939 current
IL 93 9.6 15.4 IL 91 in Elmira IL 40 in Bradford 1924 current
IL 94 128.76 207.22 US 24 in Camp Point US 67 in Oak Grove 1924 current
IL 94A 1937 Now IL 164
IL 94B 1937 Now IL 135
IL 95 17.12 27.55 IL 41 in Bardolph IL 97 in Cuba 1918 current
IL 95A 1937 Now IL 94
IL 96 141.16 227.17 IL 100 in Kampsville IL 94 in Lomax 1924 current
IL 97 104.43 168.06 I-55/I-72/US 36 in Springfield I-74/US 150 in Knoxville 1934 current
IL 97A 1937 Now IL 116
IL 98 8.36 13.45 IL 29 in Pekin I-155 in Morton 1939 current
IL 99 32.08 51.63 IL 104 in Chambersburg IL 101 in Huntsville 1936 current
IL 100 159.09 256.03 US 67 in Alton IL 78 in Dunfermline 1924 current
IL 101 19.43 31.27 IL 61 in Augusta US 67 in Littleton 1924 current
IL 102 18.33 29.50 US 45/US 52 in Bourbonnais IL 53 in Wilmington, Will County 1924 current Originally Chatton to Camp Point
IL 103 9.18 14.77 US 24 in Ripley US 67/IL 100 in Frederick 1924 current
IL 104 125.91 202.63 US 24/IL 57 in Quincy IL 29 in Taylorville 1924 current
IL 105 37.58 60.48 IL 48 in Decatur I-72 in Monticello 1945 current Originally Meredosia to Quincy on what is now IL 104
IL 106 66.47 106.97 I-72/US 36/IL 110 (CKC) in Hull US 67 in White Hall, Illinois 1938 current
IL 107 23.14 37.24 I-72/US 36/US 54 in Pittsfield IL 99 in Mt. Sterling 1924 current
IL 108 54.06 87.00 IL 100 in Kampsville I-55 in Raymond 1924 current
IL 109 8.22 13.23 IL 3 in Dow US 67 in Jerseyville 1924 current
IL 110 328 528 I-72 near Hannibal, Missouri I-90/I-94/I-290 in Chicago 2010 current Chicago-Kansas City Expressway; Originally Jerseyville to Benld
IL 111 82.18 132.26 Lake Drive in Centreville IL 104 in Waverly 1924 current
IL 112 1964 Now IL 159; Originally Royal Lakes to Edwardsville
IL 113 33.95 54.64 IL 47 in Mazon IL 17 in Kankakee 1924 current
IL 113N 1940 1961 Now IL 102
IL 113S 1940 1961 Now IL 113
IL 114 7.4 11.9 IL 1/IL 17 in Momence SR 10 near Lake Village, Indiana 1924 current
IL 115 63.37 101.98 IL 9 in Elliott US 45/US 52 in Kankakee, Illinois 1924 current
IL 116 176.07 283.36 US 34/IL 94 in Gladstone US 45 in Ashkum 1924 current
IL 116A 1924 1994 Replaced by IL 117
IL 117 33.85 54.48 I-74 in Goodfield IL 17 in Toluca 1924 current
IL 118 1924 1933 Originally Streator to Pontiac on what is now IL 23
IL 118 1935 1938 Replaced by DuPage CH 7
IL 119 7.78 12.52 US 136/IL 1 west of Alvin SR 28 east of Alvin 1924 current Originally Heyworth to the Indiana Line north of Danville
IL 119A 1924 1937
IL 120 34.48 55.49 US 14 in Woodstock IL 131 in Waukegan 1941 current Originally Havana to Mason City on what is now IL 119 in 1937, then became US 136 in 1951; Formerly IL 20
IL 121 109.48 176.19 IL 130 in Greenup I-55/IL 10 in Lincoln 1924 current Originally Peoria to Decatur, then to the Indiana line, near Chrisman
IL 122 31.53 50.74 IL 29 in Green Valley IL 9 in Danvers 1924 current Originally Bloomington to Havana
IL 123 33.72 54.27 IL 125 in Pleasant Plains I-55 in Williamsville 1924 current Originally Alexander to Athens
IL 124 5.71 9.19 IL 123 in Williamsville Business I-55 in Sherman 1924 current Originally Athens to Springfield on what is now IL 29
IL 125 37.1 59.7 US 67/IL 100 in Beardstown IL 97 in Pleasant Plains 1924 current Originally Springfield to Virginia
IL 126 17.25 27.76 IL 47 in Yorkville I-55 in Plainfield 1935 current Formerly IL 66; Originally Springfield to Litchfield
IL 127 167.53 269.61 IL 3 in Unity I-55/IL 48 in Raymond 1924 current
IL 127A 1924 1937 Now IL 143
IL 128 55.57 89.43 I-70 in Altamont IL 121 in Dalton City 1924 current
IL 128A 1938
IL 129 4.06 6.53 IL 113 in Braidwood I-55 north of Braidwood 1960 current Originally Effingham to Windsor on what is now IL 32
IL 130 135.87 218.66 IL 1 in Grayville I-74 in Urbana 1924 current Originally Charleston to Albion
IL 130A 5 8 1930 1942[9] Newton to Sainte Marie
IL 131 15.15 24.38 IL 176 in Lake Bluff WIS 31 near Pleasant Prairie, Wisconsin 1938 current Originally Mattoon to Greenup on what is now IL 121
IL 132 13.57 21.84 IL 59 in Fox Lake Hills IL 131 in Waukegan 1950 current Originally Decatur to Mattoon on what is now IL 121
IL 133 52.05 83.77 IL 32 in Lovington US 150/IL 1/IL 16 in Paris 1924 current
IL 134 5.62 9.04 US 12/IL 59 in Fox Lake IL 120 in Hainesville 1950 current
IL 135 20.31 32.69 IL 164 in Kirkwood US 67 in Alexis 1937 current
IL 136 3.22 5.18 Iowa 136 in Fulton US 30 east of Fulton 1967 current
IL 137 23.49 37.80 IL 83 in Grayslake WIS 32 in Winthrop Harbor 1953 current
IL 138 14.95 24.06 IL 159 in Bunker Hill Illinois Street in Mt. Olive 1942 current Originally Mt. Carmel to Grayville
IL 139 1937 Now IL 14; Originally Caramelville to Wabash River Bridge
IL 140 52.05 83.77 IL 143 in Alton US 40 near Mulberry Grove 1935 current Originally Fairfield to Cave in Rock
IL 141 18.17 29.24 US 45 north of Texas City SR 62 east of New Haven 1924 current
IL 142 55.06 88.61 Calhoun Street in Equality I-57 in Mt. Vernon 1926 current
IL 142A 1926 1942 Now IL 242
IL 143 47.96 77.18 US 67 in Alton IL 127 in Tamalco 1937 current Originally Benton to Harrisburg
IL 144 1924 1964 Now IL 149; Originally Grimsby to Murphysboro
IL 145 43.47 69.96 US 45 in Metropolis US 45/IL 34 in Harrisburg 1926 current
IL 146 92.93 149.56 MO 34/MO 74 in East Cape Girardeau IL 1 in Cave-In-Rock 1926 current
IL 147 12.81 20.62 IL 146 in Vienna IL 145 in Eddyville 1947 current Originally Marion to Cairo on now what IL 37
IL 148 54.85 88.27 IL 37 in Pulleys Mill IL 37/IL 142 in Mt. Vernon 1926 current
IL 149 45.92 73.90 IL 3 in Gorham IL 34 in Thompsonville 1926 current Formerly IL 144
IL 150 24.19 38.93 MO 51 in Chester IL 154 in Cutler 1926 current Originally Cairo to Harmel
IL 151 7.84 12.62 IL 3 in Jacob IL 4 in Ava 1940 current Originally Steeleville to Murphysboro
IL 152 6.76 10.88 IL 13/IL 127 in Pyatts US 51 in Du Quoin 1924 current
IL 153 18.35 29.53 IL 154 in Sparta IL 15 in Addieville 1926 current Originally Eden to Irvington
IL 154 63.63 102.40 IL 3/IL 159 in Red Bud IL 37 in Whittington 1926 current Originally Pinkeyville to Sunfield
IL 155 10.81 17.40 Fort de Chartres State Historical Site IL 3 in Ruma 1924 current
IL 156 22.95 36.93 South Meyer Avenue/C Road in Valmeyer IL 13 in New Athens 1926 current
IL 157 33.50 53.91 IL 3 in Cahokia IL 140 in Hamel 1926 current
IL 158 25.81 41.54 IL 3 in Columbia I-64/US 50 in O'Fallon 1926 current
IL 159 64.90 104.45 IL 3/IL 154 in Red Bud IL 16 in Royal Lakes 1926 current
IL 160 46.06 74.13 IL 15 in Addieville IL 140 in Alhambra 1959 current Originally Alton to Greenville
IL 161 67.24 108.21 St. Clair Avenue in Fairview Heights IL 37 in Kell 1926 current Originally Carlyle to Belleville
IL 162 16.36 26.33 IL 203 in Granite City US 40 in Troy 1954 current Originally Spring Valley to LaMoille
IL 163 9.89 15.92 IL 158 in Millstadt IL 15 in Alorton 1954 current
IL 164 35.70 57.45 US 34 in Gladstone US 34/IL 41/IL 110 (CKC) in Galesburg 1937 current
IL 165 29.64 47.70 IL 9 in Merna IL 47 in Sibley 1924 current
IL 166 14.43 23.22 US 45 in New Burnside IL 13 in Pittsburg 1924 current
IL 167 12.24 19.70 US 34 in Wataga IL 180 in Victoria, Illinois 1924 current
IL 168 1926 1941 Now IL 97
IL 169 9.04 14.55 IL 37 in Karnak US 45 in New Columbia 1949 current
IL 170 25 40 IL 23 in Cornell US 6 in Seneca, Illinois 1945 current Formerly IL 70A and IL 186
IL 171 38.61 62.14 US 6 in Joliet IL 72 in Chicago 1946 current Formerly IL 4A and IL 213
IL 172 13.06 21.02 IL 92 in Yorktown IL 40 in Tampico 1946 current Originally Libertyville to Gurnee
IL 173 66.20 106.54 IL 251 in Machesney Park IL 137 in Zion 1924 current
IL 174 5.3 8.5 IL 88 in Peoria IL 91 west of Alta 1924 1983
IL 175 2 3 US 24/IL 9 near Glasford Glasford 1924 1935
IL 176 41.28 66.43 IL 23 in Marengo IL 131 in Lake Bluff 1926 current Formerly IL 67
IL 177 47.59 76.59 IL 13/IL 158/IL 159 in Belleville US 51 in Irvington 1924 current
IL 178 8.49 13.66 Ed Lambert Road in Lowell I-80 in North Utica 1924 current
IL 179 16.3 26.2 IL 251 near Rutland IL 18 near Streator 1935 1995 Originally IL 45
IL 180 15.43 24.83 US 150 in Williamsfield IL 17 in Victoria 1924 current
IL 181 Now IL 33
IL 182 Now IL 161
IL 183 Now IL 154
IL 184 5.87 9.45 IL 149 in Royalton IL 14 in Mulkeytown 1924 current
IL 185 49.88 80.27 IL 127 in Taylor Springs IL 37 in Farina 1924 current
IL 186 1938 1945 Now IL 170
IL 190 Now I-88
IL 192 8.31 13.37 IL 92 in Illinois City IL 94 in Taylor Ridge 1955 current
IL 194 1960 1978 Now I-90/I-94 in Chicago
IL 199 1969 1980 Now IL 92
IL 203 9.51 15.30 Collinsville Road in Fairmont City I-270 in Granite City 1964 current
IL 213 1946 Now IL 171
IL 226 1946 Replaced by IL 172
IL 242 18.67 30.05 IL 142 in McLeansboro IL 15 in Wayne City 1924 current Formerly IL 142A
IL 250 33.44 53.82 US 50 in Noble Business US 50 in Lawrenceville 1965 current
IL 251 135.32 217.78 I-39/US 51 in Hudson US 51/IL 75 in South Beloit 1982 current
IL 255 23.3 37.5 I-255/I-270 in Pontoon Beach US 67 in Godfrey 1998 current
IL 267 59 95 US 67/IL 111 in Godfrey Business I-72/Business US 67/IL 104 in Jacksonville 1965 current
IL 316 1981 Now part of IL 16
IL 336 80 129 I-172/US 24/IL 110 (CKC) in Quincy US 136/IL 110 (CKC) in Macomb 1990 current
IL 351 8.55 13.76 IL 71/IL 251 in Oglesby I-80 in LaSalle 1966 current
IL 390 6.01 9.67 US 20 in Hanover Park I-290 in Elk Grove Village 2013 current Formerly the Elgin–O'Hare Expressway
IL 394 14.63 23.54 IL 1 in Crete I-80/I-94/I-294 in South Holland 1956 current
IL 594 1971 1978 Now I-190
  •       Former


Inventory routes[edit]

Inventory Route Number sign near Jacksonville IL (Morgan County) on US-67

Illinois uses unique "inventory number" signage on rural roads that are owned or maintained by IDOT but may or may not be part of the US or Illinois highway systems. These number signs are white squares, with a green divided circle. The county name is within the dividing line, the mileage from the county line is in the lower half and the inventory or route number in the upper. Number series vary between IDOT Districts, in some areas the number used on otherwise unnumbered routes are a derivative of the former number (ie: "913" used on a section of former IL 13) or a sequential number unrelated to the original or former number (such as the 8900 series numbers used in the Galesburg–Macomb area). On many US and Illinois Routes the posted number is used, with or without a preceding descriptor. These signs are not intended for navigation as route numbers are but rather as guides for IDOT crews and contractors and to identify specific intersections, culverts or other features.[10]

See also[edit]

References[edit]

  1. ^ Carlson, Miriam C. (April 2002). "Out of the Mud: Illinois' Good Roads Movement". Illinois History. Illinois Historic Preservation Agency. 55 (3): 47–9. ISSN 0019-2058 – via Illinois Periodicals Online. 
  2. ^ a b c d Carlson, Richard (March 15, 2005). "Illinois Highway Trivia". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  3. ^ Carlson, Richard (October 29, 2013). "Routes 200 and up". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  4. ^ Carlson, Richard (August 15, 2010). "Routes 101 thru 120". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  5. ^ http://www.n9jig.com/busn.html
  6. ^ Carlson, Richard (December 21, 2014). "Routes 41 thru 60". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  7. ^ Carlson, Richard (October 2, 2016). "Routes 61 thru 80". Illinois Highways Page. Retrieved November 1, 2016. [self-published source]
  8. ^ Carlson, Richard (April 15, 2009). "Routes 61 thru 80". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  9. ^ Carlson, Richard (August 31, 2009). "Routes 121 thru 140". Illinois Highways Page. Retrieved January 1, 2016. [self-published source]
  10. ^ http://www.n9jig.com/trivia.html

External links[edit]