List of Illinois Routes

	; Standard Illinois Route shield
System information
Notes:	Illinois Routes are generally state-maintained.
Highway names
Interstates:	Interstate X (I-X)
US Routes:	U.S. Route X (US X)
State:	Illinois Route X (ILL X)

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Overall map of Illinois routes system. Expressways are marked in light blue. Tollways are marked in green. Major Interstate are roughly marked

Illinois Route 72 cross-sign mounted on a stoplight in Hoffman Estates

The organized system of Illinois Routes (typically abbreviated as ILL), the state highway system for the U.S. state of Illinois, was created in 1918 with the first State Bond Issue (SBI) Routes, 1 through 46. Bonds were floated to pay for specific routes. SBI # 1 paid for Route 1, and so on. These initial 46 route numbers marked the major infrastructure roads desired by the state legislature in 1918. Remarkably, many of these numbers still exist on the original or nearby alignment. As the highway system grew these numbers were altered to accommodate new roads or extensions of older roads.

In 1924, additional State Bond Issues were authorized for SBI Routes 47 through 185. These route numbers were originally assigned and grouped to specific regions of the state. Thus, it is not uncommon to find groups of routes with similar numbers around each other (routes 23, 26, and 29 are found in north-central Illinois, while routes 56, 58, 59, 60, 62, 64, 68 and 72 are all be found in northeastern Illinois and routes 100, 101, 103, 104, 105, 107 are found in western Illinois west of the Illinois River and largely south of McDonough County line.

SBI Route numbers that were superseded by other routes, US or state routes were often reused. For example, SBI Route 61 was originally assigned to a road segment in northeastern Illinois, but was reassigned to a route in western Illinois, sometime after 1937.

SBI Numbers are still used for several purposes, even when they do not match the posted number. IDOT District maps still refer to SBI numbers on the various roads it maintains, along with other non-posted designations that refer to how the route was authorized. Bridge weight plates refer to SBI numbers instead of posted route numbers as well. For example, bridge plates along old US-66 refer to the route as "SBI-4"

When the US Highway System of Interstate Roads started to be posted in 1926, the US numbers were just tacked onto the existing IL/SBI number unless the US route was routed along a new route.

[edit] Illinois Highway Code

The Illinois Highway Code in the Illinois Compiled Statutes states that all state highways are to be numbered, and that no state highway shall go unnumbered.^[1] In addition, roads in the system include state highways that connect

“

any State park, State forest, State wildlife or fish refuge, the grounds of any State institution or any recreational, scenic or historic place owned or operated by the State; any national cemetery; and to any tax supported airport constructed in part by State and federal funds^[2]

”

Descriptions of each individual state highway are filed with the county clerk of the county in which the state highway resides.^[3] State highways may be maintained by either the municipalities if within a municipality, or the Illinois Department of Transportation.^[4] Should a highway run through a municipality, IDOT is authorized to choose a route through the municipality in order to make a route contiguous for through traffic.^[5]

[edit] Notes

There are a number of state routes which share numbers with Interstate routes in Illinois, i.e. Illinois Route 64 and Interstate 64. The Illinois Department of Transportation generally uses the rule that if the two routes cannot be confused, the state route will remain its number. Where confusion may occur, like Illinois Route 88 intersecting Interstate 88, the route number is changed. In the case of Illinois 88, it was renamed to Illinois Route 40.

[edit] List of Illinois Routes

Former routes are listed in italics.

[edit] 1-10

Route name	Region	Orientation	Length
Route name	Region	Orientation	Miles	Kilometers
Illinois Route 1	Eastern	North-south	336	541
Illinois Route 2	Northwestern	East-west	120	194
Illinois Route 3	Southwestern	North-south	190	306
Illinois Route 4	Central	North-south	160	257
Illinois Route 4A
Illinois Route 5	Northwestern	East-west	20	32
Illinois Route 6	Central	North-south	10.06	16.19
Illinois Route 7	Northeastern	Southwest-northeast (marked north-south)	25	40
Illinois Route 8	Central	East-west	60	97
Illinois Route 9	Central	East-west	190	306
Illinois Route 10	Central	East-west	91	146

[edit] 11-20

Route name	Region	Orientation	Length
Route name	Region	Orientation	Miles	Kilometers
Illinois Route 11
Illinois Route 12
Illinois Route 13	South central	East-west	152	244
Illinois Route 14	South central	East-west	81	130
Illinois Route 15	Southern	East-west	144	232
Illinois Route 16	Central	East-west	172	277
Illinois Route 17	North central	East-west	203	327
Illinois Route 18	Central	East-west	37	60
Illinois Route 19	Northeastern	East-west	33.22	53.46
Illinois Route 20

[edit] 21-30

Route name	Region	Orientation	Length
Route name	Region	Orientation	mi	km
Illinois Route 21	Northern	East-west	28.13	45.27
Illinois Route 22	Northeastern	East-west	19.70	31.70
Illinois Route 23	Central	North-south	126.17	203.05
Illinois Route 24
Illinois Route 25	Northeastern	North-south	35.04	56.39
Illinois Route 26	Central	North-south	139.35	224.26
Illinois Route 27
Illinois Route 28
Illinois Route 29	North-central	North-south	175.36	282.21
Illinois Route 30

[edit] 31-40

Route name	Region	Orientation	Length
Route name	Region	Orientation	mi	km
Illinois Route 31	Northeastern	North-south	58.41	94.00
Illinois Route 32	Central	North-south	69.32	111.56
Illinois Route 33	Eastern	Multidirectional	97.17	156.38
Illinois Route 34	Southern	North-south	61.74	99.36
Illinois Route 35	Northwestern	East-west	2.42	3.89
Illinois Route 36
Illinois Route 37	Southern	North-south	155.07	249.56
Illinois Route 38	Northern	East-west	89.28	143.68
Illinois Route 39
Illinois Route 40	Central	North-south	112.05	180.33

[edit] 41-50

[edit] 51-60

[edit] 61-70A

[edit] 71-80

[edit] 81-90

[edit] 91-100

[edit] 101-110

[edit] 111-120

[edit] 121-130A

[edit] 131-140

[edit] 141-150

[edit] 151-160

[edit] 161-170

[edit] 171-180

[edit] 181-200

[edit] 201 and up

Illinois Route 203
Illinois Route 213
Illinois Route 226
Illinois Route 242
Illinois Route 250
Illinois Route 251
Illinois Route 255
Illinois Route 267, formerly Alternate U.S. 67.
Illinois Route 316
Illinois Route 336
Illinois Route 351
Illinois Route 394
Illinois Route 594

[edit] List of U.S. Routes in Illinois

U.S. Route 6
U.S. Route 12
U.S. Route 14
U.S. Route 20
U.S. Route 24
U.S. Route 30
U.S. Route 32
U.S. Route 34
U.S. Route 36
U.S. Route 40
U.S. Route 41
U.S. Route 45
U.S. Route 50
U.S. Route 51
U.S. Route 52
U.S. Route 54
U.S. Route 60
U.S. Route 61, was in Illinois from 1971 to 1982
U.S. Route 62
U.S. Route 66
- U.S. Route 66 Alternate, now Illinois Route 53
U.S. Route 67
- U.S. Route 67 Alternate, was on both U.S. Route 67 and Illinois Route 267 by US 67 at different points in time
U.S. Route 124
U.S. Route 136
U.S. Route 150
U.S. Route 151, was in Illinois from 1971 to 1982
U.S. Route 330
U.S. Route 430
U.S. Route 460, 1947 through 1974

[edit] List of Interstate Highways in Illinois

Main article: List of Interstate Highways in Illinois

[edit] Toll Roads

[edit] Unnumbered routes

Some routes in Illinois are state maintained, but not numbered.^[6]

[edit] References

^ 605 ILCS 5/4‑201.11
^ (605 ILCS 5/4‑201.5)
^ (605 ILCS 5/4‑204)
^ (605 ILCS 5/4‑203), (605 ILCS 5/4‑208)
^ (605 ILCS 5/4‑205)
^ "Highway System showing Maintenance Districts". Cook County Highway Department. 19 June 2007. http://www.cookcountygov.com/Agencies/hwy/SysRoute_0707.pdf. Retrieved 12 February 2011.

[edit] External links

[0] 605 ILCS 5/4‑201.11

[1] (605 ILCS 5/4‑201.5)

[2] (605 ILCS 5/4‑204)

[3] (605 ILCS 5/4‑203), (605 ILCS 5/4‑208)

[4] (605 ILCS 5/4‑205)

[5] "Highway System showing Maintenance Districts". Cook County Highway Department. 19 June 2007. http://www.cookcountygov.com/Agencies/hwy/SysRoute_0707.pdf. Retrieved 12 February 2011.

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[6]

System information
Standard Illinois Route shield
Notes:	Illinois Routes are generally state-maintained.
Highway names
Interstates:	Interstate X (I-X)
US Routes:	U.S. Route X (US X)
State:	Illinois Route X (ILL X)