Louisiana Highway 70 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

 that serves St. Mary

St. Mary Parish, Louisiana

St. Mary Parish is a parish located in the U.S. state of Louisiana. The parish seat is Franklin. As of 2000, the population was 53,500.The Morgan City Micropolitan Statistical Area includes all of St. Mary Parish.-Geography:...

, St. Martin, Assumption, and Ascension Parishes. It is primarily a two-lane highway that spans 50.89 miles (81.9 km).

Route description

LA 70 begins at an exit from U.S. Highway 90 in Morgan City. LA 70 then heads north into Assumption Parish, where it runs through Pierre Part. In Paincourtville, LA 70 intersects Louisiana Highway 1

Louisiana Highway 1

Louisiana Highway 1 is a state highway in Louisiana. At 436.20 miles , it is the longest numbered highway of any class in Louisiana. It runs diagonally across the state, connecting the oil and gas fields near the island of Grand Isle with the northwest corner of the state, north of Shreveport.The...

 via Louisiana Highway 70 Spur, a 1.6 miles (2.6 km) connector road. LA 70 then continues northeastward through rural Ascension Parish as a two-lane, undivided road. LA 70 widens to a four lane, undivided road at an intersection with Louisiana Highway 3089

Louisiana Highway 3089

Louisiana Highway 3089 is a state highway in Louisiana that serves Ascension Parish. It spans in a west to east direction and is known in Donaldsonville as Albert Street and Marchand Drive.-Route description:...

. LA 70 then crosses the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 via the Sunshine Bridge

Sunshine Bridge

The Sunshine Bridge is a cantilever bridge over the Mississippi River in St. James Parish, Louisiana. Completed in 1963, it carries LA 70, which connects Donaldsonville on the west bank of Ascension Parish with Sorrento on the east bank of Ascension Parish as well as with Gonzales on the east bank...

. LA 70 then narrows back to a two lane undivided road after intersecting Louisiana Highway 44 and continues northeastward until it ends at an intersection with Louisiana Highway 22

Louisiana Highway 22

Louisiana Highway 22 is a state highway in Louisiana that serves St. Tammany, Tangipahoa, Livingston, and Ascension Parishes. It spans in a rough east/west direction and is bannered in each cardinal direction ....

, just south of Interstate 10

Interstate 10

Interstate 10 is the fourth-longest Interstate Highway in the United States, after I-90, I-80, and I-40. It is the southernmost east–west, coast-to-coast Interstate Highway, although I-4 and I-8 are further south. It stretches from the Pacific Ocean at State Route 1 in Santa Monica,...

.