![]() ![]() ![]() In Wisconsin, I-39 is 182 miles long, which is longer than the highway’s length in Illinois. The designation of I-39 in Wisconsin violated the state’s rule of not having any state trunk highway number duplicated (whether by an interstate, US Route or state highway), because WIS 39 already existed. While concurrent, I-39/I-90 run north to South Beloit. I-39/US 20 travel east to the point where the interstate joins the Jane Addams Memorial Tollway and I-90 near Cherry Valley. Continuing northward, I-39 crosses the Kishwaukee River and then meets US 20 on Rockford’s southside. It intersects I-80 at exit 59 and intersects I-88 at exit 97 in Rochelle. Just north of the Illinois River, I-39 runs to the east of LaSalle and Peru. The bridge is 1.3 miles long and has the distinction of being the state’s longest bridge. The highway crosses the Illinois River about 55 miles north of Normal via the Abraham Lincoln Memorial Bridge. I-74 South runs toward Indianapolis.įrom Normal, I-39 runs northward, largely through rural areas. From its intersection with I-39, Interstate 55 runs to either Chicago or St. The interstate’s southern end is less than one mile from I-74 as I-74 travels around the city of Normal. The highway begins north of the Bloomington-Normal metro area at I-55. With the exception of one mile of roadway in the state, I-39 is designated concurrently with US 51. In Illinois, I-39 has a total length of 140.82 miles. Ultimately there were so many crashes on the road that it earned the nickname “Killer 51.” Over time, as traffic levels increased, it became a heavily traveled two-lane road. US 51 ran primarily north-south through the middle of the state. However, the project was considered a low priority and was not acted upon. When the IHS was being planned in the early 1950s, Illinois made a request for a north-south highway from South Beloit to Salem. Route 51 (US 51) is cosigned with I-39.Ĭonstruction on I-39 in Illinois began in the early 1980s. This concurrency of three interstate highways is the longest in the nation (a total of 29 miles in length). In Wisconsin, I-94 joins I-39/I-90 in Madison and continues to Portage. From Rockford, Illinois, to Portage, I-39 runs concurrently with I-90. With the exception of an eight-mile segment around Portage, Wisconsin, I-39 shares its route with at least one other route number along its entirety. system and it is in the middle between the longest and shortest interstates. It is the 35th-longest interstate in the U.S. The interstate begins on the north side of Normal, Illinois, at I-55 and runs to State Trunk Highway 29 (WIS 29) in the town of Rib Mountain, Wisconsin (approximately 6 miles south of Wausau). Primarily a route through rural areas, I-39 serves as a bypass around the Chicago and Milwaukee metropolitan areas. At the time of the series of wrecks, there was “wintry weather.” A 30-mile stretch of the interstate was closed because of the accidents. According to the Illinois State Police, the crash scene was several hundred yards long and involved about 100 vehicles. On February 17, a multi-vehicle “mass collision” occurred on I-39 near El Paso, Illinois. Today’s article profiles I-39, which serves two states in the Midwest – Illinois and Wisconsin. The series began with a profile of Interstate 2 (I-2) and has covered each interstate in numerical order. For IDOT District 2 updates, follow us on Twitter at or view area constructionĭetails on IDOT’s traveler information map on is the latest in a FreightWaves Classics series about the U.S. Accomplishments through Year Two included approximately $5.2 billion in improvements statewide on 3,020 miles of highway and 270 bridges along with 428 additional safety improvements. Over the next six years, IDOT is planning to improve more than 3,535 miles of highway and 9 million square feet of bridge deck as part of the Rebuild Illinois capital program, which is investing $33.2 billion into all modes of transportation. Drivers are urged to pay close attention to changed conditions and signs in the work zones, obey the posted speed limits, refrain from using mobile devices and be alert for workers and equipment. To avoid the work area, when feasible, use of alternate routes should be considered. Motorists can expect delays and should allow extra time for trips through this area. The project is scheduled to be completed by anticipated to completed and reopened by Friday, Aug. A marked detour will direct traffic using eastbound Rockton Road and Illinois 251 northbound to Illinois 75. The work will close the ramp from southbound I-39/90 to Illinois 75 and create a temporary lane closure on the right lane of southbound I-39/90 near the ramp. The Illinois Department of Transportation announced today that weather permitting, construction at the Interstate 39/90 interchange at Illinois 75 (exit 1) in South Beloit will begin Monday, Aug. ![]()
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