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Lake Street
200 North (in the Chicago Loop) U.S. Route 20 General Ulysses S. Grant Highway
Length:	34.4 miles (55.4 km)
Direction:	East-west
From:	Downtown Chicago at Lower Randolph Street
To:	Elgin Bypass at Villa Street near Elgin
Major cities:	Melrose Park, Elmhurst, Addison, Bloomingdale, Roselle, Hanover Park, Bartlett
System:	Various

Lake Street is an east-west arterial road in Chicago and its suburbs. Part of Lake Street is designated as U.S. Route 20. Lake Street begins in the city of Chicago and travels west and slightly north to the Chicago suburbs. It ends at the eastern terminus of the Elgin Bypass around Elgin, where U.S. 20 once was routed west through downtown Elgin onto Villa Street. This is a distance of about 34.4 miles (55.4 km).^[1]

Lake Street begins at Columbus Drive in the Chicago Loop as a one-way eastbound street. Starting at the first westbound segment at Canal Street, it runs west through the city of Chicago before heading into the western suburbs. For most of the first 7 miles (11 km) miles from Wabash Avenue to Laramie Avenue, Lake Street runs beneath the elevated Green Line CTA tracks.^[1]

Lake Street runs beneath the Union Pacific railroad tracks near Central Avenue.

In Stone Park, Lake Street runs concurrent with U.S. 20 at Mannheim Road. Eastbound U.S. 20 turns south with U.S. Routes 12 and 45. Westbound U.S. 20 follows Lake Street westbound to the western terminus of Lake Street for 20.7 miles (33.3 km).^[1] A portion of Lake Street in Elmhurst has been replaced by the Eisenhower Expressway; at this point, U.S. 20 runs on the Eisenhower for 2 miles (3 km). Lake Street parallels the Eisenhower until the interchange with Interstate 355.

Continuing west, Lake Street becomes a six lane divided highway while passing through the western suburbs; at Roselle, it becomes a four-lane divided highway. At the current western terminus of the Elgin-O'Hare Expressway, Lake Street becomes six lanes once again through Hanover Park. Just west of the Villa Olivia Country Club, Lake Street ends at the eastern terminus of the Elgin Bypass.

All of Lake Street was once marked as U.S. 20. In 1938, U.S. 20 was moved onto Mannheim Road and La Grange Road. The remaining segment of Lake Street became City U.S. 20. In 1960, it was renamed to Business U.S. 20. In 1968, all designations were dropped from Lake Street east of Mannheim Road.^[2]

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