The route is primarily used to access southbound Louisiana Highway 21 (LA 21) and Covington's business district.

It continues through Covington's downtown business district as 21st Avenue, where it intersects LA 21 (South Tyler Street).

At the eastern terminus of US 190 Business, signs guide drivers to I-12 and the cities of Mandeville and New Orleans via southbound US 190.

The first half of the bypass, which ran north to south, was constructed in the mid-to-late 1950's to move Louisiana Highway 25 out of downtown Covington.

Both requests were approved at the AASHO meeting in June 1969 and the Louisiana Department of Highways began signposting the routes as such the same year.