Wisconsin Highway 14State Trunk Highway 14 was a number assigned to two different state highways in Wisconsin, United States: Highway 14 from 1917 to 1926, assigned the U.S. Route 8 designation in 1926 Highway 14 from 1926 to 1933, currently routed as Highway 81 from Cassville to Beloit and Highway 15 from Beloit to Milwaukee For the highway in Wisconsin numbered 14 since 1933, see U.S. Route 14.