Interstate 90 in Illinois - Lane Configuration

Lane Configuration

Interstate 90 runs through downtown Chicago, resulting in some odd lane configurations when compared to downtown arteries like the Schuylkill Expressway in Philadelphia:

From north to south:

• Wisconsin state line to Rockton Road (2.7 miles) -- 4 lanes (2 lanes in each direction)
• Rockton Road to Interstate 39 split (14.5 miles) -- 6 lanes (3 lanes in each direction with a 4th on approach to I-39)
• Interstate 39 split to Randall Road (35 miles) -- 4 lanes (2 lanes in each direction)
• Randall Road to Tri-State Tollway (I-294) (25.7 miles) -- 6 lanes (3 lanes in each direction plus a variable 1-2 collector/distributor lanes near Elgin toll plaza, the I-290/IL-53 interchange, and the I-294/I-190 interchange)
• Tri-State Tollway to Edens Expressway (I-94) -- 6 lanes (3 lanes each way)
• Edens Junction to Ohio Street -- 10 lanes (2 reversible, 4 westbound, 4 eastbound)
• Ohio Street to Eisenhower Expressway (Interstate 290) -- 10 lanes (5 westbound, 5 eastbound)
• At the Eisenhower Expressway -- 6 lanes (3 westbound, 3 eastbound)
• From the Eisenhower Expressway to the Stevenson Expressway (Interstate 55) -- 10 lanes (5 eastbound, 5 westbound)
• From the Stevenson Expressway to the 47th Street Slip -- 14 lanes (express: 4 lanes each way, local: 3 lanes each way)
• Between the 47th Street and 51st Street Slip Ramps -- 14 lanes (express: 3 lanes each way, local: 4 lanes each way)
• 51st Street to the Chicago Skyway (Interstate 90) -- 14 (same configuration as north of 47th, although one eastbound express lane transitions into the Skyway slip).
• Entire stretch of Chicago Skyway to Indiana -- 6 lanes (3 lanes each way)