Jefferson Parish is a parish in the U.S. state of Louisiana. As of the 2020 census, the population was 440,781. Its parish seat is Gretna, its largest community is Metairie, and its largest incorporated city is Kenner. Jefferson Parish is included in the Greater New Orleans area.
U.S. Highway 90 Business 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.
Louisiana Highway 1 (LA 1) is a state highway in Louisiana. At 431.88 miles (695.04 km), 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.
Louisiana Highway 23 is a north–south state highway in Louisiana that serves Plaquemines and Jefferson Parishes. It spans 74.0 miles (119.1 km) in roughly a southeast to northwest direction. It is known locally as Belle Chasse Highway and Lafayette Street.
U.S. Highway 90 (US 90), one of the major east–west U.S. Highways in the Southern United States, runs through southern Louisiana for 297.6 miles (478.9 km), serving Lake Charles, Lafayette, New Iberia, Morgan City, and New Orleans. Much of it west of Lafayette and east of New Orleans has been supplanted by Interstate 10 (I-10) for all but local traffic, but the section between Lafayette and New Orleans runs a good deal south of I-10.
Louisiana Highway 45 (LA 45) is a state highway located in Jefferson Parish, Louisiana. It runs 22.08 miles (35.53 km) in a north–south direction from a dead end at Bayou Barataria in Lafitte to a junction with LA 18 in Marrero.
Louisiana Highway 22 (LA 22) is a state highway located in southeastern Louisiana. It runs 71.15 miles (114.50 km) in a general east–west direction from the junction of LA 75 and LA 942 in Darrow to U.S. Highway 190 (US 190) in Mandeville.
The Crescent City Connection Division (CCCD) is an agency within the Louisiana Department of Transportation and Development. The purpose of the CCCD is to plan, construct, operate, maintain and police all Mississippi River crossings in Jefferson, Orleans, and St. Bernard Parishes. Prior to the 1989, the CCCD was known as the Mississippi River Bridge Authority (MRBA) and had control of only the Greater New Orleans Bridge (now the Crescent City Connection). The Crescent City Connection Bridge is the fifth busiest bridge in the nation. More than 33 million vehicles traverse the structure annually.
Louisiana Highway 48 is a state highway in Louisiana that serves St. Charles and Jefferson Parishes. It runs from west to east, parallel to the east bank of the Mississippi River, from Norco to Jefferson. It spans a total of 20.9 miles (33.6 km). Throughout its run, LA 48 is known as Apple Street, River Road, 3rd Street, Reverend Richard Wilson Drive, and Jefferson Highway.
Louisiana Highway 3127 is a state highway in Louisiana that serves Ascension, St. James, St. John the Baptist, and St. Charles Parishes. It spans 42.1 miles (67.8 km) in a northwest to southeast direction. It parallels LA 18 along the west bank of the Mississippi River, providing a much shorter inland bypass of the River Road. It is bannered in all four cardinal directions depending upon the part of the route.
Louisiana Highway 308 is a state highway in Louisiana that serves Ascension, Assumption, and Lafourche Parishes. It spans 82.5 miles (132.8 km), following the east bank of Bayou Lafourche from Donaldsonville to Golden Meadow. It parallels LA 1 during its entire route, as LA 1 follows the west bank of the bayou.
Louisiana Highway 44 is a state highway in Louisiana that serves Ascension, St. James, and St. John the Baptist Parishes. It runs from west to east, parallel to the east bank of the Mississippi River, from Prairieville to LaPlace. It spans a total of 50.1 miles (80.6 km). Throughout its run, LA 44 is known as North/South Burnside Avenue, River Road, West/East Jefferson Highway, West 5th Street, and Main Street.
LA 1 / LA 3089 in Donaldsonville 
LA 20 in North Vacherie 
LA 3017 in Harvey 
US 90 Bus. / Future I-49 / LA 23 in Gretna 
