What is the CGM Corridor?
The GCM Corridor (Gary Chicago Milwaukee) Corridor is a high traffic area previously designated by the US Department of Transportation as a Priority Corridor. Because of population and traffic in the original three-state area of Illinois, Indiana, and Wisconsin the Corridor is being expanded into Michigan and is being renamed the Lake Michigan Interstate Gateway Alliance (LMIGA). Look for the labels on the GCM Travel website to reflect this new name in the future. The Interstate highways including Tollways and major arterials in Illinois, northwestern Indiana, and southeastern Wisconsin are covered by this system. Cook, DuPage, Lake, McHenry, Kane, and Will counties in Illinois, Lake, LaPorte, and Porter counties in Indiana, and Kenosha, Milwaukee, Ozaukee, Racine, Walworth, Washington, and Waukesha counties in Wisconsin are included in the primary coverage area. This information is made available on the GCM (LMIGA) Gateway Traveler Information System as a service to the traveling publ
