{{short description|Highway in Illinois}} {{Use mdy dates|date=April 2022}} {{Use American English|date=April 2022}} {{Infobox road |state=IL |route=474 |type=I |alternate_name= |map={{maplink-road|from=Interstate 474.map}} |map_custom=yes |map_notes=I-474 highlighted in red |length_mi=14.88 |length_ref=<ref name=t2>{{cite web |author=Illinois Technology Transfer Center |url=http://www.dot.state.il.us/gist2/select.html |title=T2 GIS Data |access-date=2007-11-08 |year=2006 |archive-date=August 10, 2007 |archive-url=https://web.archive.org/web/20070810103329/http://dot.state.il.us/gist2/select.html |url-status=live }}</ref> |established=1979<ref>{{Illinois road map |year=1979 |access-date=November 24, 2022 }}</ref><ref name=kurumi>Kurumi. [http://www.kurumi.com/roads/3di/ix74.html 3-digit Interstates from I-74] {{Webarchive|url=https://web.archive.org/web/20060317081710/http://www.kurumi.com/roads/3di/ix74.html |date=March 17, 2006 }}. Last updated November 24, 2005. Retrieved March 27, 2006.</ref> |spur_type=I |spur_of=74 |direction_a=West |terminus_a={{Jct|state=IL|I|74|IL|6}} in Peoria |junction={{Jct|state=IL|US|24}} at the Bartonville–Peoria line<br>{{Jct|state=IL|US|24|IL|29}} in Creve Coeur |direction_b=East |terminus_b={{Jct|state=IL|I|74}} in East Peoria |counties=Peoria, Tazewell |previous_type=IL |previous_route=394 |next_type=I |next_route=490 }} '''Interstate 474''' ('''I-474''') is an Interstate Highway loop route that provides a southwestern bypass around the north-central Illinois city of Peoria. I-474's parent Interstate is I-74. As the first digit of the Interstate's number is even, it follows the established convention of providing a loop around a city. I-474 is {{convert|14.88|mi|km}} long. I-474 is currently the highest numbered route in the state of Illinois,<ref name="t2" /> but will be surpassed by I-490 when that road is completed in 2027. It is also, excluding the proposed I-274 in North Carolina, the only auxiliary route of I-74.
== Route description == [[Image:Shade-Lohmann Bridge, Creve Coeur, Illinois.jpg|thumb|left|Shade–Lohmann Bridge from the southeast]] I-474 is a modern, Interstate-standard four-lane freeway for its entire length. Prior to 2006, through truck traffic on I-74 was instructed to use I-474. This is because prior to its 2004–2007 reconstruction, I-74 was significantly below Interstate standard, having numerous {{convert|15|mph|km/h|adj=on}} on- and offramps, extremely short merging space for onramps (some less than {{Convert|500|ft|m}} in length),<ref>{{cite map |title=USGS Map of Peoria, Illinois |url=https://ngmdb.usgs.gov/img4/ht_icons/overlay/IL/IL_Peoria%20East_308460_1996_24000_geo.jpg |website=ngmdb.usgs.gov |access-date=September 22, 2020}}</ref> {{citation needed span|date=April 2020|and a {{convert|50|mph|km/h|adj=on}} speed limit through downtown Peoria.}}
The Illinois Route 116 (IL 116) access interchange at Maxwell Road has been indicated as the eastern terminus for the Quincy to Peoria expressway now known as the IL 336 project.<ref name="sect3grid_r1_c5">Illinois Department of Transportation. [http://www.peoriatomacomb.com/maps/3slice/sect3grid_r1_c5.gif Image of eastern end of project maps] {{Webarchive|url=https://web.archive.org/web/20060725095054/http://www.peoriatomacomb.com/maps/3slice/sect3grid_r1_c5.gif |date=July 25, 2006 }} from [http://www.peoriatomacomb.com/ Peoria to Macomb IDOT site] {{Webarchive|url=https://web.archive.org/web/20060421230848/http://www.peoriatomacomb.com/ |date=April 21, 2006 }}. Retrieved March 27, 2006.</ref>
The western terminus of I-474 is at I-74 exit 87A. The eastern terminus of I-474 is at I-74 exit 99. North of the western terminus, the road continues as IL 6 with a new series of exit numbers.
== History == I-474 was constructed through the mid-1970s. The now-named Shade–Lohmann Bridge was erected in 1973. During that year, $30.1 million (equivalent to ${{Formatprice|{{inflation|US-GDP|30100000|1973}}}} in {{Inflation/year|index=US-GDP}}{{Inflation/fn|index=US-GDP}}) was allocated for acquisition of right-of-way, grading work, and overpass/bridge construction across the whole length of the highway.<ref name=polk1973>{{citation |author=R.L. Polk and Company |title=Polk's Peoria City Directory |year=1973 |publisher=R.L. Polk and Co. Publishers}}</ref>
== Exit list == {{Jcttop|exit|length_ref=|exit_ref=}} {{ILint|exit |county=Peoria |cspan=5 |location=none<!-- rural Kickapoo Township as of 2020 --> |lspan=2 |mile=0.00 |mspan=2 |road={{Jct|state=IL|IL|6|dir1=north|city1=Chillicothe}} |notes=Continuation north beyond I-74 }} {{ILint|exit |mile=none |exit=0 |road={{Jct|state=IL|I|74|city1=Peoria|city2=Moline|city3=Rock Island}} |notes=Western terminus; signed as exits 0A (east) and 0B (west); I-74 exit 87A }} {{ILint|exit |location=Bellevue |mile=3.78 |exit=3A |road={{Jct|state=IL|to1=to|IL|116|city1=Farmington}} }} {{ILint|exit |location=none<!-- rural Limestone Township as of 2020 --> |mile=5.34 |exit=5 |road={{Jct|state=IL|CR|R49|county1=Peoria|name1=Airport Road|extra=airport}} |notes=Serves Peoria International Airport}} {{ILint|exit |location1=Bartonville |location2=Peoria |type=concur |mile=7.09 |exit=6 |road={{Jct|state=IL|US|24|dir1=west|name1=Adams Street|city1=Bartonville}} |notes=West end of US 24 overlap; signed as exits 6A (US 24 west) & 6B (Adams Street) westbound }} {{Jctbridge|exit |river=Illinois River |mile=8.83 |mile2=9.04 |bridge=Shade–Lohmann Bridge }} {{ILint|exit |county=Tazewell |cspan=2 |type=concur |location=Creve Coeur |mile=9.57 |exit=9 |road={{Jct|state=IL|US|24|dir1=east|IL|29|city1=East Peoria|city2=Pekin}} |notes=East end of US 24 overlap }} {{ILint|exit |location=East Peoria |type=incomplete |mile=14.88 |exit=15 |road={{Jct|state=IL|I|74|to2=to|I|155|dir2=south|city1=Peoria|location2=Indianapolis|city3=Lincoln}} |notes=Eastbound exit and westbound entrance; eastern terminus and signed as exit 15 (west); I-74 exit 99 }} {{Jctbtm|col=8|keys=concur,incomplete}}
== References == {{reflist}}
== External links == {{Attached KML|display=inline,title}} * [https://web.archive.org/web/20121012063439/http://highwayexplorer.com/il_EndsPage.php?id=3474§ion=1 Illinois Highway Ends: Interstate 474] {{commons category}} {{3di|74}}
74-4 74-4 Category:Transportation in Peoria County, Illinois Category:Transportation in Tazewell County, Illinois 4