CHICAGO (CBS) — Chicago has the dubious distinction of having the worst bottleneck for truckers in the country.

A study of truck traffic found that the Circle Interchange–where the Dan Ryan, Kennedy and Eisenhower expressways meet–is the worst in the United States.

LISTEN: WBBM Newsradio’s Bob Conway Reports

The average speed through the “spaghetti bowl”–named for all of the ramps that connect the three expressways–is 29 miles per hour.

Two other Chicago area bottlenecks also made the top ten.

Coming in at No. 6 is the Interstate 65 and Interstate 80 exchange in Gary, Ind. At No. 8: the Kennedy-Edens expressway junction on the North Side.

The study was done by the American Transportation Research Institute and the Federal Highway Administration.

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