From the west, LA 48 begins at an intersection with
US 61 (
Airline Highway) in Norco. Then known as Apple Street, it runs southward as an undivided two-lane highway. When it reaches the Mississippi River, it turns eastward to follow and run parallel to it as River Road. It intersects
LA 627, dividing and expanding to four lanes briefly at the interchange with
I-310, followed by intersections at
LA 626 and
LA 50 as it continues downriver through the St. Charles Parish communities of
New Sarpy,
Destrehan,
St. Rose, and
Almedia. As it enters Jefferson Parish and the city of
Kenner, it becomes known as 3rd Street and then Reverend Richard Wilson Drive. The road becomes a divided four-lane street at Williams Boulevard, and upon crossing from Kenner into
River Ridge at Filmore Street, it becomes known as Jefferson Highway. After passing through
Harahan, LA 48 shortly merges with
US 90 at the east bank base of the
Huey P. Long Bridge and
LA 3152 (South Clearview Parkway) in
Elmwood, becoming a six-lane divided highway through the concurrency. LA 48 ends at Central Avenue in
Jefferson, and US 90 continues along Jefferson Highway toward
New Orleans. ==History==