Interstate 355

Interstate 355
Veterans Memorial Tollway North–South Tollway
I-355 highlighted in red
Route information
Maintained by ISTHA
Length:	32.5 mi (52.3 km)
History:	December 24, 1989 – I-55 to I-290 November 11, 2007 – I-80 to I-290
Major junctions
South end:	I-80 in New Lenox
	US 6 in New Lenox I-55 in Bolingbrook US 34 in Downers Grove I-88 / IL 110 (CKC) in Downers Grove US 20 in Addison
North end:	I-290 in Itasca
Location
Counties:	Will, Cook, DuPage
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Illinois State Highway System Interstate U.S. State Tollways ← IL 351 IL 390 →

Interstate 355 (I-355), also known as the Veterans Memorial Tollway, is an Interstate Highway and tollway in the western and southwest suburbs of Chicago in the U.S. state of Illinois. Like most other toll roads in the northeastern portion of the state, I-355 is maintained by the Illinois State Toll Highway Authority (ISTHA). I-355 runs from I-80 in New Lenox north to I-290 in Itasca, a distance of 32.5 miles (52.3 km). With the exception of a four-mile (6.4 km) expansion in 2009, from U.S. Route 34 (US 34, Ogden Avenue) to 75th Street, the highway is six lanes wide for its entire length.

The tollway authority opened I-355 as the North–South Tollway in 1989 to ease congestion on Illinois Route 53 (IL 53), a parallel two-lane state highway in central DuPage County. Initially, I-355 ran from I-55 north to I-290. The new highway helped cut travel times for commuters traveling north and south in the county. According to commercial real estate developers at the time, the new tollway also opened the western suburbs of Chicago to commercial and industrial development.

On November 11, 2007, the tollway authority opened a southern extension of I-355 from I-55 to I-80, a distance of 12.5 miles (20.1 km); on its opening, the tollway authority changed the name of the tollway to "Veterans Memorial Tollway". The tollway authority laid the route of the new extension through Will County and a small portion of Cook County, one of the fastest-growing regions in Illinois. The tollway authority expected the extension to cut travel times in the region by 20 percent.