Interstate 12 (I-12) is an intrastate Interstate Highway located entirely within the US state of Louisiana. It spans a total of 85.59 miles (137.74 km) in an east–west direction from I-10 in Baton Rouge to an interchange with both I-10 and I-59 in Slidell. Along the way, it passes through the city of Hammond, where it intersects I-55 and US Route 51 (US 51). It also serves the cities of Ponchatoula and Denham Springs, as well as the St. Tammany Parish cities of Covington and Mandeville. Skirting the northern shore of Lake Pontchartrain, I-12 serves as both a northern bypass of the New Orleans metropolitan area and an alternate route for I-10, which serves the city of New Orleans itself.
Hammond is the largest city in Tangipahoa Parish, Louisiana, United States, located 45 miles (72 km) east of Baton Rouge and 45 miles (72 km) northwest of New Orleans. Its population was 20,019 in the 2010 U.S. census, and 21,359 at the 2020 population estimates program.
U.S. Route 190 (US 190) is an east–west United States Highway in Louisiana and Texas. Segments of US 190 will be upgraded to Interstate 14 (I-14); the first 24.8-mile (39.9 km) segment was opened on January 26, 2017.
Louisiana Highway 16 (LA 16) is a state highway located in southeastern Louisiana. It runs 110.27 miles (177.46 km) in a general east–west direction from LA 22 south of French Settlement to LA 21 in Sun.
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.
Louisiana Highway 1077 (LA 1077) is a state highway located in southeastern Louisiana. It runs 20.61 miles (33.17 km) in a general north–south direction from a dead end at Lake Pontchartrain in Madisonville to a junction with LA 25 south of Folsom.
Louisiana Highway 445 is a state highway in Louisiana that serves Tangipahoa Parish. It spans 24.6 miles (39.6 km) in a south to north direction. Near its north end, it is known as Husser Road.
U.S. Highway 51 (US 51) is a part of the United States Numbered Highway System that spans 1,277 miles (2,055 km) from LaPlace, Louisiana to a point north of Hurley, Wisconsin. Within the state of Louisiana, the highway travels 69.12 miles (111.24 km) from the national southern terminus at US 61 in LaPlace to the Mississippi state line north of Kentwood.
Ponchatoula Creek is a 26.1-mile-long (42.0 km) tributary of the Natalbany River in Tangipahoa Parish, Louisiana. The two waterways join where a section of the Natalbany forms the boundary between Tangipahoa Parish and Livingston Parish. Ponchatoula Creek originates west of Old US Highway 51, 1 mile (1.6 km) north of Independence. The creek is entirely within Tangipahoa Parish.
Louisiana Highway 40 (LA 40) is a state highway located in southeastern Louisiana. It runs 53.11 miles (85.47 km) in an east–west direction from LA 43 south of Montpelier to LA 41 in Bush.
Louisiana Highway 43 (LA 43) is a state highway located in southeastern Louisiana. It runs 44.38 miles (71.42 km) in a north–south direction from LA 42 west of Springfield to the Mississippi state line north of Easleyville, where it continues as Mississippi Highway 568 (MS 568).
U.S. Highway 61/190 Business is a business route of both U.S. Route 61 and U.S. Route 190 in Louisiana that serves as a boulevard into downtown Baton Rouge. It spans 10.89 miles (17.53 km) in a southeast to northwest direction and it is signposted as Business 61/190, generally without directional shields. It follows parts of the former alignment of US 61/190 through Baton Rouge, which existed in downtown Baton Rouge from 1935 until 1960.
Louisiana Highway 103 is a state highway in St. Landry Parish, Louisiana, United States, that spans 39.5 miles (63.6 km) in a wide semi-circle around the north side of Opelousas. The route is not bannered but runs in an overall west–east direction from U.S. Highway 190 near Lawtell to LA 31 in Leonville. Along the way, it passes through the towns of Washington and Port Barre.
US 190 in Hammond 
LA 3234 in Hammond 
LA 1064 in Tickfaw 
LA 442 in Tickfaw 
US 51 / LA 1063 in Independence 
