U.S. Highway 90 Business (BUS US 90, officially 90-Y) is a state highway in Louisiana that serves Lafayette Parish. It spans 2.6 miles (4.2 km) in a northwest to southeast direction and it is signed as Business 90, with no directional shields. It is known as University Avenue and Pinhook Road. Most of the route follows the previous alignment of US 90 through downtown Lafayette.