5 Most Congested Highways in America

4. Chicago, IL: I-90 at I-94 (North)

Peak Average Speed: 20.7 Miles Per Hour

Non-peak Average Speed: 39.4 Miles Per Hour

Interstate 90 (I-90) in Chicago, Illinois, is a north-south Interstate Highway. The peak average speed on I-90 decreased by 21.8% from 2021 to 2022 thereby making the highway one of the most congested in America. The peak average speed on the highway was recorded at 20.7 miles per hour. Interstate 90 (I-90) at Interstate 94 (I-94) is a highly congested interchange.