Improvement 02

02 I-55 from I-80 to US 52

The interchange project includes the conversion of the existing partial interchange at IL 59 and I-55 to a full access diverging diamond interchange, also known as a DDI. A DDI is a double cross over diamond. The diamond shaped configuration allows for two directions of traffic on a bridge to cross to the opposite side of the bridge. The benefits of this type of interchange include improved safety and operations. This project provides connections for pedestrians and bicyclists over I-55 to IL 59 and new auxiliary lanes between IL 59 and US 52 to improve congestion and safety for vehicles entering and exiting the roadway.

Funding & Schedule

Preliminary engineering and environmental studies (Phase I) for the interchange project were completed in May 2019. Contract plan preparation and land acquisition (Phase II) were completed in June 2022. The project has moved on to the final implementation phase and is currently under construction (Phase III).

Noise Study

The I-55 from I-80 to US 52 study evaluated traffic noise impacts and recommended that potential noise walls be implemented along I-55 within the project study limits. Property owners and tenants that would achieve a benefit from these walls had an opportunity to vote on whether the noise walls should be installed.

Voting results showed that both walls were supported. Therefore, the two noise walls along I-55 have been recommended for implementation. The approximate locations of the walls are shown in the Noise Wall Voting Results diagram below.

Read the Traffic Noise Study Report Here