56:
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266:
49:
311:
40:
31:
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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
253:
The State
Highway System 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.
279:
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
231:
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
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SBI Route numbers that were superseded by other routes, US or state routes were often reused.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.
68:
258:
north-central
Illinois, while routes 53, 56, 58, 59, 60, 62, 64, 68 and 72 are all 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.
244:
if within a municipality, or the
Illinois Department of Transportation. 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.
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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.
812:
227:
states that all state highways are to be numbered and that no state highway shall go unnumbered. In addition, roads in the system include state highways that connect
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822:
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495:
516:
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137:
92:
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843:
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was started in 1926, the US numbers were just tacked onto the existing IL/SBI number unless the US Route was routed along a new route.
797:
771:
711:
636:
561:
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686:
459:
178:
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611:
586:
183:
726:
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591:
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numbers instead of posted route numbers as well. For example, bridge plates along old US-66 refer to the route as "SBI-4"
766:
741:
681:
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601:
576:
556:
336:
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273:
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100:
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661:
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Highway markers for
Interstate 57, U.S. Route 45, Illinois Route 1 and the Chicago Skyway
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of the county in which the state highway resides. State highways may be maintained by either the
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208:
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Descriptions of each individual state highway are filed with the
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468:
30:
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347:(3). Illinois Historic Preservation Agency: 47–9.
337:"Out of the Mud: Illinois' Good Roads Movement"
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8:
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473:
465:
16:Highway system in Illinois, United States
366:– via Illinois Periodicals Online.
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497:Numbered highways in the United States
18:
445:Illinois Department of Transportation
285:United States Numbered Highway System
272:cross-sign mounted on a stoplight in
7:
80:in green, other highways in yellow
14:
335:Carlson, Miriam C. (April 2002).
225:Illinois Highway Code (605 ILCS5)
460:Illinois State Highway Endpoints
440:605 ILCS 5/Illinois Highway Code
309:
297:
66:
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29:
1:
166:Illinois State Highway System
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844:State highways in Illinois
110:November 5, 1918
161:
90:
65:
26:
813:Northern Mariana Islands
152:Illinois Route X (IL X)
72:Overall map of system:
517:U.S. Numbered Highways
455:Road Signs of Illinois
450:Illinois Highways Page
276:
234:
207:of the U.S. state of
316:U.S. Roads portal
268:
219:Illinois Highway Code
211:comprises all of the
803:District of Columbia
205:State Highway System
22:State Highway System
512:Interstate Highways
304:Illinois portal
142:U.S. Route X (US X)
377:605 ILCS5/4-201.11
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132:Interstate X (I-X)
86:System information
831:
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388:605 ILCS5/4-201.5
270:Illinois Route 72
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505:National systems
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355:. Archived from
341:Illinois History
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138:US Highways
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425:605 ILCS5/4-205
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410:605 ILCS5/4-203
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399:605 ILCS5/4-204
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76:in light blue,
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823:Virgin Islands
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798:American Samoa
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732:South Carolina
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528:State highways
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434:External links
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242:municipalities
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203:The organized
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91:Maintained by
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772:West Virginia
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677:New Hampshire
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637:Massachusetts
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359:on 2013-06-09
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737:South Dakota
727:Rhode Island
722:Pennsylvania
702:North Dakota
596:
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361:. Retrieved
357:the original
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260:
256:
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238:county clerk
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213:state routes
204:
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165:
164:
157:System links
818:Puerto Rico
791:Other areas
652:Mississippi
567:Connecticut
128:Interstates
767:Washington
687:New Mexico
682:New Jersey
557:California
363:2014-04-25
322:References
174:Interstate
114:1918-11-05
777:Wisconsin
742:Tennessee
647:Minnesota
622:Louisiana
353:0019-2058
283:When the
838:Category
762:Virginia
712:Oklahoma
692:New York
667:Nebraska
657:Missouri
642:Michigan
632:Maryland
617:Kentucky
597:Illinois
572:Delaware
562:Colorado
552:Arkansas
291:See also
209:Illinois
189:Tollways
78:tollways
74:freeways
782:Wyoming
757:Vermont
662:Montana
602:Indiana
582:Georgia
577:Florida
547:Arizona
537:Alabama
249:History
112: (
717:Oregon
672:Nevada
612:Kansas
587:Hawaii
542:Alaska
351:
194:Scenic
107:Formed
99:, and
747:Texas
627:Maine
592:Idaho
232:funds
184:State
148:State
97:ISTHA
808:Guam
752:Utah
707:Ohio
607:Iowa
349:ISSN
223:The
93:IDOT
101:SCC
840::
412:,
345:55
343:.
339:.
179:US
95:,
488:e
481:t
474:v
116:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
