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2 Major Cities Along the Route
3 Intersections with other Interstates
4 Spur Routes
Number of Miles
Major Cities Along the Route
Intersections with other Interstates
Future plans call for Interstate 39 to be extended north from Wausau to Merrill, Wisconsin along the United States Highway 51 freeway, which is Interstate standard, but it is not signed as Interstate as of December 2001.