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.

Press and Media Inquiries:

Natalia Derevyanny

Maria Phelan

Location Title
George W. Dunne Cook County Office Building
Location Email
Location Phone
Location Fax
Location Hours
Sunday: Closed
Monday: 8:30 am-4:30 pm
Tuesday: 8:30 am-4:30 pm
Wednesday: 8:30 am-4:30 pm
Thursday: 8:30 am-4:30 pm
Friday: 8:30 am-4:30 pm
Saturday: Closed

Agency Head

Jennifer "Sis" Killen, P.E., PTOE, Superintendent