More than half of the route is an elevated freeway with frontage roads while mainline US 90 is a divided six-lane surface highway. It is also the only business route of a U.S. Highway in Louisiana that is not derived from a former alignment of its parent route.
A significant portion of the route is an elevated freeway with frontage roads, and mainline US 90 is a divided six-lane surface highway. Additionally, it is the only business route of a U.S. Highway in Louisiana that does not originate from a former alignment of its parent route.