I-55 from I-80 to US 52 (Will County)

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.