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I-55 Reconstruction Project Study

The Illinois Department of Transportation (IDOT) is studying ways to improve the interstate through Springfield and Sangamon County from south of the Sixth Street interchange to north of the Sherman Boulevard interchange.  

The focus of the study is to relieve traffic congestion and increase public safety for residents and motorists who travel along I-55.  IDOT and its study team will evaluate the capacity of the roadway and its interchanges and determine the need for additional traffic lanes, interchange improvements and other roadway enhancements.

Information you need to know about this study – its goals, timeline and ways to get involved and give your input – can be found on the study's website.  Visit often for the latest updates, and sign up to receive email notices on study activities and progress. 

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