Transportation and Highways
The Cook County Department of Transportation and Highways (DoTH) 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. DoTH has maintenance responsibilities for 1,620 lane miles of pavement, 132 bridges, 360 traffic signals and seven pumping stations from four maintenance facilities.
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