Interstate 90.
Answer:
Worcester, Massachusetts
Boston, Massachusetts
Springfield, Massachusetts
Pittsfield, Massachusetts
Albany, New York
Schenectady, New York
Utica, New York
Syracuse, New York
Rochester, New York
Buffalo, New York
Erie, Pennsylvania
Cleveland, Ohio
Toledo, Ohio
South Bend, Indiana
Gary, Indiana
Chicago, Illinois
Rockford, Illinois
Janesville, Illinois
Beloit, Illinois
Madison, Wisconsin
Wisconsin Dells, Wisconsin
La Crosse, Wisconsin
Albert Lea, Minnesota
Sioux Falls, South Dakota
Rapid City, South Dakota
Gillette, Wyoming
Sheridan, Wyoming
Billings, Montana
Bozeman, Montana
Missoula, Montana
Butte, Montana
Spokane, Washington
Ellensburg, Washington
Seattle, Washington
Bellevue, Iowa