List of Illinois Routes

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

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.

General notes

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

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
IL 1 322.48518.98 KY 91 in Cave in RockI-57 in Chicago 1918current IL-1 was posted on what is now IL-294 from 1957 to 1964, the old road was Alt-IL-1 during that time.
IL 2 73.91118.95 IL 40 in SterlingWIS 213 in South Beloit 1918current Originally Rockford to Dixon to Mendota to Cairo. Replaced by US-51 south of Mendota
IL 3 187.44301.66 I-57 / US 51 in CairoIL 100 in Grafton 1918current Originally Morrison to Chester, replaced by other roads including IL-78 and US-67 north of the St. Louis area.
IL 4 170.44274.30 IL 13 / IL 127 in VergennesI-55 Bus. in Springfield 1918current 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 19261967 Replaced by IL 171
IL 5 15.7825.40 US 67 in Rock IslandI-80 / I-88 / IL 92 / IL 110 (CKC) in East Moline 1972current Originally Chicago to East Dubuque, replaced mostly by US-20 except near Rockford until that was replaced later by Business 20. Later used to replace IL-190 on the E-W Tollway until 1987 when it was replaced by I-88 east of I-80
IL 6 10.1116.27 I-74 / I-474 in PeoriaIL 29 in Peoria c.1971current 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 28.0645.16 US 6 in RockdaleIL 43 in Worth 1918current Originally Chicago to E. Moline, replaced west of Orland Park by US-6 about 1928 then extended to Rockdale in 1969
IL 8 45.5173.24 IL 97 in MaquonUS 24 in Washington 1918current Originally Gulfport to Sheldon, removed in parts and replaced by US-34, US-24 and other routes.
IL 9 218.31351.34 Iowa 2 in NiotaSR 26 / SR 352 in Hoopeston 1918current Originally Hamilton to Cheneyville, replaced in part by US-136, IL-41 and IL-9
IL 10 91.35147.01 US 136 in EastonUS 150 in Champaign 1918current Originally Jacksonville to Decature, later extended to Danville and Havana.
IL 11 Originally Terre Haute to St. Louis, replaced by US 40
IL 12 Originally Vincennse to St. Louis, replaced by US 50
IL 13 151.54243.88 IL 157 / IL 163 in CentrevilleKY 56 in Old Shawneetown 1918current Originally Old Shawneetown to St. Louis
IL 14 76.24122.70 US 51 in Du QuoinSR 66 in Phillipstown 1918current Originally DuQuoin to Carmi
IL 15 149.64240.82 I-55 / I-64 / US 40 / IL 3 in East St. LouisSR 64 in Mt. Carmel 1918current Originally E. St. Louis to Albion
IL 16 174.66281.09 IL 100 in HardinUS 150 / IL 1 / IL 133 in Paris 1918current 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 17 209.4337.0 1st Street in New BostonSR 2 in Grant Park 1918current
IL 18 39.0162.78 IL 29 in HenryIL 17 in Blackstone 1939current
IL 19 33.6454.14 IL 25 in ElginUS 41 in Chicago 1949current
IL 20 Replaced by IL 120
IL 21 28.1345.27 IL 43 in NilesUS 41 in Gurnee 1918current
IL 22 19.731.7 US 14 in Fox River GroveUS 41 in Highland Park 1918current
IL 22A 19241925 Now part of IL 63, which is deleted in 1973; then IL 68
IL 23 126.17203.05 IL 116 in PontiacUS 14 in Harvard 1918current Formerly known as IL 118
IL 24 19181940 Replaced by IL 29
IL 25 35.0456.39 US 34 in OswegoIL 62 in Carpentersville c.1930current
IL 26 139.35224.26 IL 116 in East PeoriaWIS 69 in Orangeville 1918current
IL 27 Now part of US 52
IL 28 Now part of US 34
IL 29 175.36282.21 US 51 / IL 16 in PanaUS 6 / IL 89 in Spring Valley 1918current
IL 30 19181941 Replaced by IL 91
IL 31 58.4194.00 US 34 in OswegoUS 12 in Richmond 1937current
IL 32 69.32111.56 US 40 / IL 33 in EffinghamIL 48 in Cisco 1918current
IL 33 97.17156.38 IL 128 in Beecher CityUS 50 in Lawrenceville 1918current
IL 34 61.7499.36 Hopkinton Street / Walnut Street in RosiclareIL 14 / IL 37 in Benton 1918current
IL 35 2.423.89 US 20 in East DubuqueWIS 35 in East Dubuque 1938current
IL 36 19181937 Replaced by IL 94
IL 37 155.07249.56 US 51 in CairoUS 45 in Watson 1918current
IL 38 89.28143.68 US 52 in DixonUS 12 / US 20 / US 45 in Westchester 1918current
IL 39 Now part of US 150
IL 40 19171937 became part of IL 88
IL 40 112.05180.33 I-74 in East PeoriaIL 78 in Mount Carroll 1995current Formerly IL 88
IL 41 37.5360.40 US 136 in AdairUS 34 / IL 110 / IL 164 in Galesburg 1918current
IL 42 19241972 Was the designation of Sheridan Road
IL 42A 19251967 Replaced by IL 43
IL 43 60.397.0 US 30 in FrankfortUS 41 in Park City 1967current Formerly IL 42A
IL 44 Now part of US 52
IL 45 Became IL 179 in 1936; IL 179 was deleted by 1995
IL 46 Became in part US 45 from La Grange to Des Plaines[6]
IL 47 169.76273.20 IL 10 in SeymourWIS 120 in Hebron 1924current
IL 48 85.38137.41 I-55 / IL 127 in RaymondIL 54 in DeWitt 1924current
IL 49 140.86226.69 IL 33 in Willow HillUS 45 / US 52 in Ashkum 1924current
IL 50 66.49107.01 US 45 / US 52 in KankakeeUS 41 in Skokie 1924current
IL 51 Now part of US 45
IL 52 Replaced by IL 83
IL 53 82.02132.00 I-55 in GardnerIL 83 in Long Grove 1924current
IL 54 109.35175.98 I-55 in SpringfieldUS 45 in Onarga 1972current Formerly US 54
IL 55 Replaced by IL 56
IL 56 32.5252.34 US 30 / IL 47 in Sugar GroveUS 12 / US 20 / US 45 in Bellwood 1924current
IL 57 12.5920.26 I-172 / IL 110 (CKC) in Fall CreekUS 24 / IL 104 in Quincy 1949current
IL 58 28.345.5 IL 25 in ElginUS 41 in Skokie 1924current
IL 59 71.13114.47 I-55 in ShorewoodIL 173 in Antioch 1924current
IL 59A Replaced by IL 60
IL 60 17.2227.71 IL 120 in VoloUS 41 in Lake Forest 1967current Formerly IL 59A
IL 61 44.7772.05 IL 96 in UrsaUS 136 / IL 110 / IL 336 in Tennessee 1924current
IL 62 20.8233.51 IL 31 in AlgonquinIL 83 in Des Plaines 1924current
IL 63 19261973 Replaced in part by IL 21, IL 59, and IL 68
IL 64 136219 US 52 / Iowa 64 in SavannaUS 41 in Chicago 1924current
IL 65 19241971 Swapped routes with US 34, pulled in 1971[7]
IL 66 Replaced by IL 126
IL 67 Replaced in part by IL 176
IL 68 25.7441.42 IL 72 in East DundeeI-94 / US 41 in Glencoe 1942current
IL 69 Replaced in part by US 52
IL 70 19.0130.59 IL 75 in DurandUS 20 Bus. in Rockford 1924current
IL 70A Replaced by IL 170
IL 71 69.37111.64 I-180/IL 29 in HennepinUS 34 in Oswego 1938current
IL 72 110.71178.17 IL 73 in LanarkIL 43 in Chicago 1924current
IL 73 29.3247.19 US 52/IL 64 in LanarkWisconsin state line near Winslow 1924current
IL 74 Replaced in part by IL 26
IL 75 41.6467.01 IL 26 in FreeportWIS 67 in South Beloit 1924current
IL 76 15.6725.22 Business US 20 in BelvidereWIS 140 east of South Beloit 1924current
IL 77 19171936 Replaced by IL 64
IL 78 215.51346.83 US 67/Business US 67/IL 104 in JacksonvilleWIS 78 near Warren 1924current
IL 79 19171936 Replaced by IL 35
IL 79 19671981 Replaced by IL 336
IL 80 Replaced part of US 150 and IL 84
IL 81 25.7841.49 US 150 in Lynn CenterIL 78 in Kewanee 1924current
IL 82 28.8446.41 IL 17 in Bishop HillIL 92 in Geneseo 1924current
IL 83 92.22148.41 US 30 in LynwoodWIS 83 in Antioch 1941current
IL 84 93.93151.17 US 6 in ColonaWIS 80 near Galena 1955current
IL 85 Now US 67
IL 86 Now IL 2
IL 87 Now IL 26
IL 88 Now IL 40
IL 89 55.4889.29 IL 116 in MetamoraUS 34 in LaMoille 1924current
IL 90 15.825.4 IL 78 near LauraIL 40 near Edelstein 1924current
IL 91 40.7265.53 US 150 in PeoriaUS 34/IL 78 in Kewanee 1941current
IL 92 106.41171.25 Iowa 92 near Muscatine, IowaUS 34 in LaMoille 1939current
IL 93 9.615.4 IL 91 in ElmiraIL 40 in Bradford 1924current
IL 94 128.76207.22 US 24 in Camp PointUS 67 in Oak Grove 1924current
IL 94A Now IL 164
IL 94B Now IL 135
IL 95 17.1227.55 IL 41 in BardolphIL 97 in Cuba 1918current
IL 95A Now IL 94
IL 96 141.16227.17 IL 100 in KampsvilleIL 94 in Lomax 1924current
IL 97 104.43168.06 I-55/I-72/US 36 in SpringfieldI-74/US 150 in Knoxville 1937current
IL 97A Now IL 116
IL 98 8.3613.45 IL 29 in PekinI-155 in Morton 1939current
IL 99 32.0851.63 IL 104 in ChambersburgIL 101 in Huntsville 1936current
IL 100 159.09256.03 US 67 in AltonIL 78 in Dunfermline 1924current
IL 101 19.4331.27 IL 61 in AugustaUS 67 in Littleton 1924current
IL 102 18.3329.50 US 45/US 52 in BourbonnaisIL 53 in Wilmington, Will County 1924current
IL 103 9.1814.77 US 24 in RipleyUS 67/IL 100 in Frederick 1924current
IL 104 125.91202.63 US 24/IL 57 in QuincyIL 29 in Taylorville 1924current
IL 105 37.5860.48 IL 48 in DecaturI-72 in Monticello 1945current
IL 106 66.47106.97 I-72/US 36/IL 110 (CKC) in HullUS 67 in White Hall, Illinois 1938current
IL 107 23.1437.24 I-72/US 36/US 54 in PittsfieldIL 99 in Mt. Sterling 1924current
IL 108 54.0687.00 IL 100 in KampsvilleI-55 in Raymond 1924current
IL 109 8.2213.23 IL 3 in DowUS 67 in Jerseyville 1924current
IL 110 328528 I-72 near Hannibal, MissouriI-90/I-94/I-290 in Chicago 2010current Chicago-Kansas City Expressway
IL 111 82.18132.26 Lake Drive in CentrevilleIL 104 in Waverly 1924current
IL 112 Now IL 159
IL 113 33.9554.64 IL 47 in MazonIL 17 in Kankakee 1924current
IL 113N 19401961 Now IL 102
IL 113S 19401961 Now IL 113
IL 114 7.411.9 IL 1/IL 17 in MomenceSR 10 near Lake Village, Indiana 1924current
IL 115 63.37101.98 IL 9 in ElliottUS 45/US 52 in Kankakee, Illinois 1924current
IL 116 176.07283.36 US 34/IL 94 in GladstoneUS 45 in Ashkum 1924current
IL 116A Now IL 117
IL 117 33.8554.48 I-74 in GoodfieldIL 17 in Toluca 1924current
IL 118 19241933 Now IL 23
IL 118 19341937 Now DuPage CH 7
IL 119 7.7812.52 US 136/IL 1 west of AlvinSR 28 east of Alvin 1924current
IL 120 34.4855.49 US 14 in WoodstockIL 131 in Waukegan 1941current Formerly IL 20
IL 121 109.48176.19 IL 130 in GreenupI-55/IL 10 in Lincoln 1924current
IL 122 31.5350.74 IL 29 in Green ValleyIL 9 in Danvers 1924current
IL 123 33.7254.27 IL 125 in Pleasant PlainsI-55 in Williamsville 1924current
IL 124 5.719.19 IL 123 in WilliamsvilleBusiness I-55 in Sherman 1924current
IL 125 37.159.7 US 67/IL 100 in BeardstownIL 97 in Pleasant Plains 1924current
IL 126 17.2527.76 IL 47 in YorkvilleI-55 in Plainfield 1935current Formerly IL 66
IL 127 167.53269.61 IL 3 in UnityI-55/IL 48 in Raymond 1924current
IL 127A Now IL 143
IL 128 55.5789.43 I-70 in AltamontIL 121 in Dalton City 1924current
IL 129 4.066.53 IL 113 in BraidwoodI-55 north of Braidwood 1960current
IL 130 135.87218.66 IL 1 in GrayvilleI-74 in Urbana 1924current
IL 130A 58 19301942 Newton to Ste. Marie, pulled in 1942[8]
IL 131 15.1524.38 IL 176 in Lake BluffWIS 31 near Pleasant Prairie, Wisconsin 1938current
IL 132 13.5721.84 IL 59 in Fox Lake HillsIL 131 in Waukegan 1950current
IL 133 52.0583.77 IL 32 in LovingtonUS 150/IL 1/IL 16 in Paris 1924current
IL 134 5.629.04 US 12/IL 59 in Fox LakeIL 120 in Hainesville 1950current
IL 135 20.3132.69 IL 164 in KirkwoodUS 67 in Alexis 1937current
IL 136 3.225.18 Iowa 136 in FultonUS 30 east of Fulton 1967current
IL 137 23.4937.80 IL 83 in GrayslakeWIS 32 in Winthrop Harbor 1953current
IL 138 14.9524.06 IL 159 in Bunker HillIllinois Street in Mt. Olive 1942current
IL 139 Now IL 14
IL 140 52.0583.77 IL 143 in AltonUS 40 near Mulberry Grove 1935current
IL 141 18.1729.24 US 45 north of Texas CitySR 62 east of New Haven 1924current
IL 142 55.0688.61 Calhoun Street in EqualityI-57 in Mt. Vernon 1926current
IL 142A 19241977 Now IL 242
IL 143 47.9677.18 US 67 in AltonIL 127 in Tamalco 1937current
IL 144 19261963 Now IL 149
IL 145 43.4769.96 US 45 in MetropolisUS 45/IL 34 in Harrisburg 1926current
IL 146 92.93149.56 MO 34/MO 74 in East Cape GirardeauIL 1 in Cave-In-Rock 1926current
IL 147 12.8120.62 IL 146 in ViennaIL 145 in Eddyville 1947current
IL 148 54.8588.27 IL 37 in Pulleys MillIL 37/IL 142 in Mt. Vernon 1926current
IL 149 45.9273.90 IL 3 in GorhamIL 34 in Thompsonville 1926current Formerly IL 144
IL 150 24.1938.93 MO 51 in ChesterIL 154 in Cutler 1926current
IL 151 7.8412.62 IL 3 in JacobIL 4 in Ava 1940current
IL 152 6.7610.88 IL 13/IL 127 in PyattsUS 51 in Du Quoin 1924current
IL 153 18.3529.53 IL 154 in SpartaIL 15 in Addieville 1926current
IL 154 63.63102.40 IL 3/IL 159 in Red BudIL 37 in Whittington 1926current
IL 155 10.8117.40 Fort de Chartres State Historical SiteIL 3 in Ruma 1924current
IL 156 22.9536.93 South Meyer Avenue/C Road in ValmeyerIL 13 in New Athens 1926current
IL 157 33.5053.91 IL 3 in CahokiaIL 140 in Hamel 1926current
IL 158 25.8141.54 IL 3 in ColumbiaI-64/US 50 in O'Fallon 1926current
IL 159 64.90104.45 IL 3/IL 154 in Red BudIL 16 in Royal Lakes 1926current
IL 160 46.0674.13 IL 15 in AddievilleIL 140 in Alhambra 1959current
IL 161 67.24108.21 St. Clair Avenue in Fairview HeightsIL 37 in Kell 1926current
IL 162 16.3626.33 IL 203 in Granite CityUS 40 in Troy 1954current
IL 163 9.8915.92 IL 158 in MillstadtIL 15 in Alorton 1954current
IL 164 35.7057.45 US 34 in GladstoneUS 34/IL 41/IL 110 (CKC) in Galesburg 1937current
IL 165 29.6447.70 IL 9 in MernaIL 47 in Sibley 1924current
IL 166 14.4323.22 US 45 in New BurnsideIL 13 in Pittsburg 1924current
IL 167 12.2419.70 US 34 in WatagaIL 180 in Victoria, Illinois 1924current
IL 168 Now IL 97
IL 169 9.0414.55 IL 37 in KarnakUS 45 in New Columbia 1949current
IL 170 2540 IL 23 in CornellUS 6 in Seneca, Illinois 1946current Formerly IL 70A and IL 186
IL 171 38.6162.14 US 6 in JolietIL 72 in Chicago 1946current Formerly IL 4A and IL 213
IL 172 13.0621.02 IL 92 in YorktownIL 40 in Tampico 1946current
IL 173 66.20106.54 IL 251 in Machesney ParkIL 137 in Zion 1924current
IL 174 5.38.5 IL 88 in PeoriaIL 91 west of Alta 19241983
IL 175 23 US 24/IL 9 near GlasfordGlasford 19241935
IL 176 41.2866.43 IL 23 in MarengoIL 131 in Lake Bluff 1926current Formerly IL 67
IL 177 47.5976.59 IL 13/IL 158/IL 159 in BellevilleUS 51 in Irvington 1924current
IL 178 8.4913.66 Ed Lambert Road in LowellI-80 in North Utica 1924current
IL 179 16.326.2 IL 251 near RutlandIL 18 near Streator 19351995
IL 180 15.4324.83 US 150 in WilliamsfieldIL 17 in Victoria 1924current
IL 181 Now IL 33
IL 182 Now IL 161
IL 183 Now IL 154
IL 184 5.879.45 IL 149 in RoyaltonIL 14 in Mulkeytown 1924current
IL 185 49.8880.27 IL 127 in Taylor SpringsIL 37 in Farina 1924current
IL 186 19381945 Now IL 170
IL 190 Now I-88
IL 192 8.3113.37 IL 92 in Illinois CityIL 94 in Taylor Ridge 1955current
IL 194 19601978 Now I-90/I-94 in Chicago
IL 199 Now IL 92
IL 203 9.5115.30 Collinsville Road in Fairmont CityI-270 in Granite City 1964current
IL 213 Now IL 171
IL 226 Now IL 172
IL 242 18.6730.05 IL 142 in McLeansboroIL 15 in Wayne City 1924current Formerly IL 142A
IL 250 33.4453.82 US 50 in NobleBusiness US 50 in Lawrenceville 1965current
IL 251 135.32217.78 I-39/US 51 in HudsonUS 51/IL 75 in South Beloit 1982current
IL 255 23.337.5 I-255/I-270 in Pontoon BeachUS 67 in Godfrey 1998current
IL 267 5995 US 67/IL 111 in GodfreyBusiness I-72/Business US 67/IL 104 in Jacksonville 1965current
IL 316 Now IL 16
IL 336 80129 I-172/US 24/IL 110 (CKC) in QuincyUS 136/IL 110 (CKC) in Macomb 1990current
IL 351 8.5513.76 IL 71/IL 251 in OglesbyI-80 in LaSalle 1966current
IL 390 6.019.67 US 20 in Hanover ParkI-290 in Elk Grove Village 2013current Formerly the Elgin–O'Hare Expressway
IL 394 14.6323.54 IL 1 in CreteI-80/I-94/I-294 in South Holland 1956current
IL 594 19711978 Now I-190
  •       Former


Inventory routes

Illinois uses unique "inventory iumber" 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.[9]

Unnumbered routes

Some routes in Illinois are state maintained, but not numbered.[10]

Some old alignments of routes are state maintained, but are not signed. They still may, however, have an unsigned designation.[11]

See also

References

  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. 1 2 3 4 Carlson, Richard (March 15, 2005). "Illinois Highway Trivia". Illinois Highways Page. Retrieved January 1, 2016.
  3. Carlson, Richard (October 29, 2013). "Routes 200 and up". Illinois Highways Page. Retrieved January 1, 2016.
  4. Carlson, Richard (August 15, 2010). "Routes 101 thru 120". Illinois Highways Page. Retrieved January 1, 2016.
  5. http://www.n9jig.com/busn.html
  6. Carlson, Richard (December 21, 2014). "Routes 41 thru 60". Illinois Highways Page. Retrieved January 1, 2016.
  7. Carlson, Richard (April 15, 2009). "Routes 61 thru 80". Illinois Highways Page. Retrieved January 1, 2016.
  8. Carlson, Richard (August 31, 2009). "Routes 121 thru 140". Illinois Highways Page. Retrieved January 1, 2016.
  9. http://www.n9jig.com/trivia.html
  10. Cook County Highway Department Map Division (June 19, 2007). Highway System showing Maintenance Districts (PDF) (Map). 1:90,000. Cook County Highway Department. Retrieved February 12, 2011.
  11. Burmaster, Bill. "Illinois State I.D. Routes". Roads of the Mid-South & West. Retrieved April 25, 2014.

External links

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