 Highway 15 provides a "shortcut" to Appleton from U.S. Highway 45 for travelers inbound from points north and west.Most of it was once part of US 45, which was redirected south of New London to bypass Appleton and provide direct access to Oshkosh and points south.WIS 15 begins at the junction of US 45 and CTH T southeast of New London as a two-lane road and heads southeast to Hortonville.