Interstate 55 Managed Lane Study

The Illinois Department of Transportation (IDOT) in cooperation with the Federal Highway Administration (FHWA) is initiating the I-55 Managed Lane Study along the I-55 corridor from the Veterans Memorial Tollway (I-355) to the Dan Ryan Expressway (I-90/I-94) in DuPage and Cook Counties. The 24-month study will evaluate options for improving traffic flow by adding an additional managed lane in each travel direction along the I-55 corridor. A managed lane utilizes operational strategies to ease congestion.

This project will study an addition of one managed lane in each direction (generally within the existing median of I-55). The study area begins at I-355 and continues east to I-90/94.

Note: IDOT projects typically have three distinct phases. Phase I (or the project Study) consists of developing the project scope, environmental studies and preliminary design of a project. Phase II (Design) consists of refining the design to develop contract plans and land acquisition. Phase III (Construction) consists of the actual construction of the project.

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