Westbank Expressway

U.S. Highway 90 Business
Surface highway segment of US 90 Bus. in thinner red; freeway portion (unsigned I-910) in thicker red
Route information
Business route of US 90
Maintained by Louisiana DOTD
Length:	14.329 mi (23.060 km) I-910: 9.70 miles (15.61 km)
Existed:	1960 – present
Tourist routes:	Great River Road National Scenic Byway River Road Scenic Byway Louisiana Scenic Byway
Major junctions
West end:	US 90 west of Westwego
	LA 45 in Marrero LA 18 / LA 23 in Gretna
East end:	I-10 / US 90 in New Orleans
Location
Parishes:	Jefferson, Orleans
Highway system
United States Numbered Highway System List Special Divided Replaced Louisiana Highway System Interstate US State ← LA 89 LA 91 → ← LA 909 I-910 LA 910 →

Harvey Tunnel

Overview
Location	Harvey
Coordinates	29°53′54″N 90°04′44″W / 29.89833°N 90.07889°W / 29.89833; -90.07889
Status	Open
Route	US 90 Bus.
Operation
Work begun	June 28, 1954
Opened	September 5, 1957 (1957-09-05)
Owner	La DOTD
Traffic	Automotive
Technical
Length	1,079.7 feet (329.1 m)
No. of lanes	4
Tunnel clearance	13 feet (4.0 m)
Width	43.9 feet (13.4 m)

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 14.33 miles (23.06 km) in a general east–west direction from a point on US 90 between Avondale and Westwego to the junction of 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. Over 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 cross via 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.