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Illinois Route 255
State highway in Madison County, Illinois, US / From Wikipedia, the free encyclopedia
Illinois Route 255 (IL 255), also referred to as the Alton Bypass, is a northwesterly extension of Interstate 255 (I-255) in southwestern Illinois in the St. Louis metropolitan area. IL 255 starts at I-270 in Pontoon Beach and ends at U.S. Route 67 (US 67) in Godfrey, at a total length of approximately 23.3 miles (37.5 km). It was constructed in four segments opening from 1998 to 2012 at a total cost of $165.2 million.
Quick Facts Route information, Length ...
Alton Bypass | ||||
IL 255 highlighted in red | ||||
Route information | ||||
Maintained by IDOT | ||||
Length | 23.3 mi[1] (37.5 km) | |||
Existed | October 1998[2]–present | |||
Major junctions | ||||
South end | ![]() ![]() | |||
North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Madison | |||
Highway system | ||||
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