St. John The Baptist Parish, Louisiana - Geography - Major Highways

Major Highways

• Interstate 10
• Interstate 55
• U.S. Highway 51
• U.S. Highway 61
• Louisiana Highway 18
• Louisiana Highway 44
• Louisiana Highway 3127
• Louisiana Highway 3188
• Louisiana Highway 3213

East Bank - The primary artery on the east bank of St. John Parish is Airline Highway (U.S. Highway 61). This five-lane, asphalt-paved road was once the predominant route linking Baton Rouge and New Orleans. Though it is still heavily traveled, much of the New Orleans-Baton Rouge traffic has been diverted to Interstate 10, located in the northern part of the parish. Interstate 10, a divided, controlled-access highway, has two interchanges in St. John Parish; one at Belle Terre Boulevard and the second at U.S. Highway 51/Interstate 55, both in LaPlace. Both Belle Terre Boulevard and Highway 51 intersect Airline Highway approximately 3.5 miles (5.6 km) south of Interstate 10.

Interstate 55, a north-south route leading to Jackson, Mississippi and beyond, intersects Interstate 10 in the northeastern sector of LaPlace. A third Interstate 10 interchange exists just west of the St. John Parish Line near Gramercy (St. James Parish).

River Road, also known as Jefferson Highway or Louisiana Highway 44, is a two-lane, asphalt-paved, winding highway which parallels the Mississippi River. Most of the heavy industry in the Parish fronts on this road.

West Bank - Most of the development on the west bank lies along Louisiana Highway 18 (the Great River Road), a two-lane, asphalt-paved highway which parallels the Mississippi River similarly to Highway 44 on the east bank. In addition to Louisiana 18, the west bank has Louisiana Highway 3127 or the River Parishes Highway, which is roughly equivalent to the east bank's Airline Highway in that it follows the Mississippi. It is not as winding nor as populated as River Road. Highway 3127 leads to Donaldsonville upriver from St. John Parish. It is home of the "Sunshine Bridge" over the Mississippi River in Ascension Parish. This road has little development on either side and is generally surrounded by wetlands in St. John Parish.

Veterans Memorial Bridge or Gramercy Bridge - (Louisiana Highway 3213) This bridge originates on the east bank of St. James Parish near Gramercy/Lutcher and has access to I-10 and Airline Highway via Louisiana Highway 641. The foot of the bridge on the west bank is in St. John Parish near Wallace, with a tie-in to Louisiana Highway 3127 that opened June 18, 2008. The opening of this bridge has spurred the development hoped for along the west bank of St. John Parish. The Bridge is known as the "Bridge to No Were".

Access to the west bank of St. John Parish is also provided by a ferry crossing at Reserve/Edgard and by the Hale Boggs Bridge over the Mississippi in St. Charles Parish.