Least Busiest Interstate in an urban area?:)

In the downtown Area: Inside the City Limits: In the Metro Area: Use the aboved to tell us your answers, remember to list the metro area. Only Interstates. Please debeat if you dont think the answer posted by anyone is right. In Chicago. In the downtown Area:Proabaly stevenson( I-55) Inside the City Limits: I-57 In the Metro Area: I- 80. You could debeat about my choices, you could say, In the metro area, it is I-355, or in the city limits, its I-190(only 2 miles long that enters O'hare) please say why like "its I-190 because its a short interstate that only go into O'hare, or I-65, because I-65 enters Gary, and nobody want to go into Gary.>