Wisconsin Highway 84State Trunk Highway 84 was a state highway in Washington County and Ozaukee counties. The highway ran between Boltonville and Port Washington.HistoryWIS 84 originally ran east-west between Boltonville and Port Washington, via Fredonia. The road was turned over to the counties in two stages in the 1990s. The first stage removed the route between Port Washington and Fillmore, and in 1992, the remainder was turned back as Washington County Trunk Hwy H, but it is unclear when the signs were removed.Major intersections