Welcome to the Algonquin Bypass Website!

The Illinois Department of Transportation in cooperation with McHenry County initiated a Congestion Mitigation Feasibility Study to identify solutions to the congestion experienced at the Illinois Route 62 and Illinois Route 31 intersection in the downtown district of the Village of Algonquin. The proposed study and subsequent proposed improvement is located in southeastern McHenry County and encompassed review of traffic which passes through the communities of Algonquin, Lake in the Hills, Cary and Crystal Lake. The final outcome of the Feasibility Study was the implementation of a Western Bypass of the intersection.

This alternative provides the most capacity to handle traffic and had the least impacts on the communities involved. The proposed improvement will provide a transportation system improvement that will address capacity, operational and safety deficiencies, and satisfy 2030 travel demands along the Illinois Route 31 corridor between Edgewood Drive and Rakow Road. The final project will include the reconstruction and widening of portions of Illinois Route 31 along with the construction of a relocated Illinois Route 31 on a new alignment.

Project Flyer	Project Flyer - Spanish

Spring 2013 Construction Update: Planned Work Algonquin Rd from Meyer Dr to IL 31: Sanitary and Water main installations will continue. Utility Companies will finish the majority of their Relocations. Excavation of the new roadbed, subgrading and PCC Paving will take place for the new Eastbound Lanes first. Excavation of the new roadbed, subgrading and PCC Paving for the New Westbound Lanes will follow. Retaining wall construction will continue along the south side of Algonquin Rd, west of IL 31. One lane in each direction will be maintained through the Spring/Summer until all new lanes are in place. Bridge Construction for the new IL 31 Bypass over Algonquin Rd will continue. IL Rte 31 from Edgewood Rd to Huntington Dr: Huntington Dr will be closed for reconstruction and realignment with the new IL 31 Bypass. Traffic will be detoured to and from Edgewood Rd during the Huntington Dr closure. Retaining wall, storm sewer, water main, sanitary sewer, Traffic Signal and Lighting work will proceed. Roadway excavation, subgrading and paving will follow the underground work. Utility Companies will complete the majority of their Relocations. Temporary pavement will be placed along existing IL Rte 31 to keep one lane in each direction open during construction. New Bypass Route of IL Rte 31 from Huntington Dr through Towne Park to Meyer Dr.: Construction of the three bridges over Crystal Creek will continue as well as various retaining wall construction. Storm sewer, water main, sanitary sewer, Traffic Signal and Lighting work will proceed. Roadway excavation, subgrading and paving will follow the underground work. Bridge Construction for the new IL 31 Bypass over Algonquin Rd will continue. IL Rte 31 from Cary/Algonquin Rd to Linden Ave: Retaining wall, storm sewer, water main, sanitary sewer, Traffic Signal and Lighting work will proceed. Roadway excavation, subgrading and paving will follow the underground work. Utility Companies will complete the majority their Relocations. Temporary pavement will be placed along existing IL Rte 31 to keep one lane in each direction open during construction.

This site has been created to provide one location where the public can get details about the Western Algonquin Bypass 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.

WORK ZONE SAFETY

Did you know work zone fatalities are down 29.6 percent compared to 2003? Aggressive law enforcement and awareness campaigns and significant improvements to work zone safety traffic control reduced Illinois work zone fatalities from 44 in 2003, including 5 workers, to provisionally 30 with 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 CONSTRUCTION ZONES

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.

IDOT DBE PROGRAM

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.

CONTACT IDOT

If you have a specific project-related question, please submit your question by visiting IDOT’s website http://www.dot.il.gov/contact.html and complete the email form to receive a prompt response.