George W. Dunne Cook County Office Building
69 W. Washington St.
24th Floor
Chicago, IL 60602
Phone Number
(312) 603-1601
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The Cook County Department of Transportation and Highways was established in 1913 by the State of Illinois upon approval of the first officially recorded County highway system maps. The present day system has evolved to include jurisdictional authority over 568 center line miles of highways. The Department has maintenance responsibilities for 1,426 lane miles of pavement, 132 bridges, 360 traffic signals and seven pumping stations from four maintenance facilities.