Illinois Department of Transportation, Erica Borggren, Acting Secretary
Patrick J. Quinn, Governor
Traveling PublicMapsProjectsRoad ClosuresNewsDoing BusinessLetting & BiddingCareers@IDOTGeneral Info


Welcome to the US Route 12/45 Website!

The objective of this project is to provide an improved transportation system by addressing congestion while enhancing operational and safety characteristics. The completed project will provide an improved linkage to the regional transportation system and complement the improvements being made in and around O’Hare International Airport.
Project Start: Spring, 2013
Project End: August 29, 2014
Project Cost: $59,600,000.00
Project Municipality: Chicago, Des Plaines, Rosemont and Schiller Park.
Project Counties: Cook

This site has been created to provide one location where the public can get details about the US Route 12/45 Widening and Reconstruction project scope and the construction staging and schedule. The information is intended to help you understand what we will be doing and when the work is anticipated to take place.

As the Department works to make this section of roadway safer for the future, we want to make sure users, residents and local business owners have up to date information on the progress of the project. If you have any questions about the project that have not been answered with the information on this site please use the “Contact Us” section and a response will be sent to you.

UPDATE- January 13, 2014

The Illinois Department of Transportation will be closing the ramps between Mannheim Road and Balmoral Avenue on January 13, 2014.

These ramps are east of Mannheim Road, to and from the Village of Rosemont. The ramp is tentatively scheduled to open mid-July 2014.

The signed detour route will be as follows:

Balmoral Avenue to NB Mannheim Road

Traffic will be detoured at Balmoral Avenue and Des Plaines River Road. Detour route is south on Des Plaines River Road to westbound Lawrence Avenue to Mannheim Road.

NB Mannheim Road to EB Balmoral Avenue

Traffic will be detoured at Lawrence Avenue and Mannheim Road. Detour route is east on Lawrence Avenue to northbound Des Plaines River Road to Balmoral Avenue.


(click image to enlarge)


Did you know that work zone fatalities are down 29.6 percent compared to 2003? Aggressive law enforcement and awareness campaigns in addition to significant improvements to work zone safety traffic control has reduced Illinois work zone fatalities from 44, including 5 workers, in 2003 to 30, including 3 workers, killed in 2010.
So, Give ‘em a brake…slow down for their sake and yours!

IDOT appreciates your patience and understanding as we work to improve the roadways in your community.


IDOT's new website provides up to date information on all current active construction contracts, including those funded through the American Recovery and Reinvestment Act of 2009, after contract execution.


If you are a small business and are interested in work on road construction projects with IDOT, click here for information on IDOT’s Disadvantaged Business Enterprise program.


If you have a specific project-related question, please submit your question by visiting IDOT’s website and complete the email form to receive a prompt response. 


IDOT Privacy Statement | Illinois Privacy Information | Kids Privacy | Web Accessibility  | FOIA