U.S. Route 90 Business (New Orleans, Louisiana)

U.S. Highway 90 Business
Non-freeway segment of US 90 Bus. in blue; freeway portion (unsigned I-910) in red
Route information
Auxiliary route of US 90
Maintained by Louisiana DOTD
Length	14.250 mi[1] (22.933 km) I-910: 9.70 miles (15.61 km)[2]
Existed	1960–present
Tourist routes	National Scenic Byway: Great River Road
Major junctions
West end	Future I-49 / US 90 in Avondale
Major intersections	LA 45 in Marrero LA 18 / LA 23 in Gretna
East end	I-10 / US 90 in New Orleans
Location
Country	United States
State	Louisiana
Parishes	Jefferson, Orleans
Highway system
United States Numbered Highway System List Special Divided Louisiana State Highway System Interstate US State Scenic
← LA 89 → LA 91
← LA 909 I-910 → LA 910

U.S. Highway 90 Business (US 90 Bus.) is a business route of U.S. Highway 90 located in and near New Orleans, Louisiana. It runs 14.25 miles (22.93 km) in a general east–west direction from US 90 in Avondale to a junction with Interstate 10 (I-10) and US 90 in the New Orleans Central Business District.

Unlike a typical business route, US 90 Bus. is built to a higher standard than the segment of US 90 that it parallels. 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. US 90 Bus. was newly constructed between 1954 and 1960 while the parallel section of US 90 has remained largely unchanged since 1936.

US 90 Bus. initially heads eastward along the Westbank Expressway, serving a number of suburban communities in Jefferson Parish located on the west bank of the Mississippi River. These include Westwego, Marrero, Harvey, and Gretna, the parish seat. After transitioning from a surface route to an elevated freeway in Marrero, US 90 Bus. traverses a high-level bridge over the Harvey Canal, a link in the Gulf Intracoastal Waterway, while the frontage roads pass through the Harvey Tunnel. Shortly after entering an area of New Orleans known as Algiers, US 90 Bus. curves due west onto the Crescent City Connection, a twin-span cantilever bridge across the Mississippi River. The highway continues alongside the downtown area as part of the elevated Pontchartrain Expressway to a complex interchange with I-10 and mainline US 90 adjacent to the Superdome.

The entirety of US 90 Bus. is intended to become part of I-49 once that highway is extended along the present US 90 corridor from Lafayette to New Orleans. In the meantime, the route carries the designation of Future I-49, as approved by the American Association of State Highway and Transportation Officials in 1999. While the Federal Highway Administration approved the existing freeway portion of US 90 Bus. to be signed as Interstate 910 in the interim, the Louisiana Department of Transportation and Development did not follow through with an application to the AASHTO's U.S. Route Numbering Committee, and the designation remains unused. This route exit 6A from the nearby west in Harvey in Gretna to New Orleans district.