Interstate 474

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. Interstate 474 is 14.88 miles (23.95 km) long. I-474 is the highest numbered route in the state of Illinois.[1] It is also, excluding the proposed I-274 in North Carolina, the only auxiliary route of I-74.

Interstate 474
Peoria Southwest Bypass
I-474 highlighted in red
Route information
Auxiliary route of I-74
Maintained by IDOT
Length14.88 mi[1] (23.95 km)
ExistedLate 1970s[2]–present
Major junctions
West end I-74 / IL 6 in Peoria
  US 24 in Bartonville
US 24 in Creve Coeur
East end I-74 in East Peoria
CountiesPeoria, Tazewell
Highway system
IL 394I-490

Route description

Interstate 474 is a modern, Interstate-standard four-lane freeway for its entire length. Prior to 2006, thru truck traffic on I-74 was instructed to use I-474. This is because prior to its 2004-2007 reconstruction, Interstate 74 was significantly below Interstate standard, having numerous 15 mph (24 km/h) onramps and offramps, extremely short merging space for onramps (some less than 500 feet (152 m) in length), and a 50 mph (80 km/h) speed limit through downtown Peoria.

The Illinois Route 116 access interchange at Maxwell Road has been indicated as the eastern terminus for the Quincy to Peoria expressway now known as the Illinois Route 336 project.[3]

The western terminus of the interstate is at I-74, exit #87A. The eastern terminus of the route is at I-74, exit #99. North of the western terminus, the route continues as Illinois Route 6 with a new series of exit numbers.


I-474 was constructed through the mid-1970s. The now-named Shade-Lohmann Bridge was erected in 1973. During that year, $30.1 million was allocated for acquisition of right-of-way, grading work and overpass/bridge construction across the whole length of the highway.[4]

Exit list

Peoria0.000.00 IL 6 north ChillicotheContinuation north beyond I-74
A–B I-74 Peoria, Moline, Rock IslandWestern terminus; signed as exits A (east) and B (west); I-74 exit 87A
Bellevue3.786.083A To IL 116 Farmington
Peoria5.348.595Airport Road
BartonvillePeoria line7.0911.416 US 24 west (Adams Street) BartonvilleWest end of US 24 overlap; signed as exits 6A (US 24 west) & 6B (Adams Street) westbound
Illinois River8.83–
Shade–Lohmann Bridge
TazewellCreve Coeur9.5715.409 US 24 east / IL 29 East Peoria, PekinEast end of US 24 overlap
East Peoria14.8823.9515 I-74 to I-155 south Peoria, Indianapolis, LincolnEastbound exit and westbound entrace; eastern terminus and signed as exit 15 (west); I-74 exit 99
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08.
  2. Kurumi. 3-digit Interstates from I-74. Last updated November 24, 2005. Retrieved March 27, 2006.
  3. Illinois Department of Transportation. Image of eastern end of project maps from Peoria to Macomb IDOT site. Retrieved March 27, 2006.
  4. R.L. Polk and Company (1973), Polk's Peoria City Directory, R.L. Polk and Co. Publishers

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