Beginning at a point on the Texas State Line, near Waskom, through Greenwood, Shreveport, Grand Cane, Mansfield, Sodus, Belmont, Marthaville, Robeline, Natchitoches, Montgomery, Colfax, ALexandria, Lecompte, Bunkie, Melville, Rosedale, Port Allen, Baton Rouge, Hope Villa, Burnside, Convent, Kenner, Shrewsbury, Protection Levee at South Claiborne Avenue, New Orleans, Louisiana, South Claiborne Avenue both sides to Canal Street, North Claiborne Avenue both sides to Poland Avenue, St. Claude Avenue, both sides to St. Bernard Parish Line, Mereaux, Violet, Poydras, Dalcour, Phoenix, Point-a-la-hache to Fort St. Philip. - 1924 Louisiana Legislative Route Description
Old LA 1 bridge near ColfaxBridge on current LA 76 stamped with LA 1 for the old alignment
As the successor to the Jefferson Highway, LA 1 started a little further south than the Jefferson Highway, but was the same route, more or less. LA 1 began in Pointe-a-la-Hache, continuing north through small communities, making its way to New Orleans. The route description from New Orleans north is as follows:
From the southern terminus at Common Street, LA 1 followed St. Charles Avenue, Canal Street, City Park Avenue, and Metairie Road into Jefferson Parish. Leaving New Orleans, LA 1 followed Metairie Road, Shrewsbury Road, and Jefferson Highway to Kenner.
From Kenner to Geismar, LA 1 followed alongside the east bank levee of the Mississippi River which, due to various sections of levee being relocated during the 1920s and 1930s, is often a significant distance removed from the modern River Road. Also, a two-mile section between Norco and Montz was eliminated in 1935 when the parallel Airline Highway bridge across the Bonnet Carré Spillway was opened. Portions of LA 1 at Reserve and Gramercy are still known as Jefferson Highway to this day.
From Geismar to Baton Rouge, the route followed what is known as Old Jefferson Highway to downtown Baton Rouge. The original routing through downtown Baton Rouge followed Claycut Road, South Acadian Thruway, Government Street, 19th Street, and North Street to the former Mississippi River ferry landing to Port Allen.
From Port Allen to Alexandria, LA 1 used Court Street, North Jefferson Avenue, and Rosedale Road through Port Allen, then along Rosedale Road to Rosedale, Ravenswood, and then to Red Cross. LA 1 crossed the Atchafalaya River by ferry to Melville and continued on to Lebeau. It used the current route of US 71 to Bunkie, with a short section over a one-lane truss bridge that was bypassed in the mid-1930s. North of Cheneyville, it used US 71 and parts of some bypassed roads to Chambers, then Old Baton Rouge Highway to Alexandria.
In Alexandria and Pineville, LA 1 used Jefferson Hwy., Lee Street, Main Street, and Murray Street through Alexandria, then LA 1 crossed the Red River on a now-demolished bridge at the foot of Murray Street into Pineville, then Main Street and Military Highway, Jefferson Highway, and US 71 (Shreveport Highway) through Pineville.
North of Pineville, LA 1 used US 71 and Shreveport Highway. (Stainaker Street is a small, severed portion of the original route near the junction of US 71 and LA 3225.) Numerous curves were straightened along the route, including a bypassed route through Colfax. North of Colfax, LA 1 followed US 71 north to Clarence, then over on LA 6 to Robeline, then on LA 1 to Belmont, via Old Jefferson Road north of Pelican) to Mansfield, following Old Jefferson Highway into town.
US 171 carried LA 1 to Shreveport, via Old Jefferson Road through Stonewall and Old Mansfield Road through Keithville. Once through Shreveport, LA 1 used US 79-US 80 (Greenwood Road) to Greenwood Road, then US 80 (Texas Avenue) across the state line toward Waskom, Texas.
The Jefferson Highway was an automobile highway stretching through the central United States from New Orleans, Louisiana, to Winnipeg, Manitoba, Canada. The Jefferson Highway was replaced with the new numbered US Highway system in the late 1920s. Portions of the highway are still named Jefferson Highway, for example: the portions that run through Jefferson Parish, Louisiana; East Baton Rouge Parish, Louisiana; Lee's Summit, Missouri; Osseo, Minnesota; and Wadena, Minnesota.
U.S. Route 71 or U.S. Highway 71 is a major north–south United States highway that extends for over 1500 miles (2500 km) in the central United States. This original 1926 route has remained largely unchanged by encroaching Interstate highways. Currently, the highway's northern terminus is in International Falls, Minnesota at the Canada–US border, at the southern end of the Fort Frances-International Falls International Bridge to Fort Frances, Ontario. U.S. Route 53 also ends here. On the other side of the bridge, Trans-Canada Highway is an east–west route while Highway 71 is a north–south route. US 71's southern terminus is between Port Barre and Krotz Springs, Louisiana at an intersection with U.S. Route 190. For the entirety south of Kansas City, Missouri, US 71 runs parallel and concurrent with the existing and future Interstate 49. North of Kansas City, US 71 runs halfway between Interstate 29 and Interstate 35, which they split in the city at an interchange with Interstate 70.
U.S. Highway 171 (US 171) is a part of the United States Numbered Highway System and the only route within that system currently located entirely within the state of Louisiana. It spans 177.44 miles (285.56 km) in a north–south direction from the junction of US 90 and Louisiana Highway 14 (LA 14) in Lake Charles to the junction of US 79/US 80 and LA 3094 in Shreveport.
U.S. Route 165 is a north–south United States highway spur of U.S. Highway 65. It currently runs for 412 miles (663 km) from U.S. Route 90 in Iowa, Louisiana north to U.S. Highway 70 in North Little Rock, Arkansas. The route passes through the states of Arkansas and Louisiana. It passes through the cities of Monroe and Alexandria in Louisiana. A segment of US 165 serves as a routing of the Great River Road within Arkansas.
U.S. Route 167 runs for 500 miles (800 km) from Ash Flat, Arkansas at U.S. Route 62/US Route 412 to Abbeville, Louisiana at Louisiana Highway 14. It goes through the cities of Little Rock, Arkansas, Alexandria, Louisiana, and Lafayette, Louisiana.
Airline Highway is a divided highway in the U.S. state of Louisiana, built in stages between 1925 and 1953 to bypass the older Jefferson Highway. It runs 115.6 miles (186.0 km), carrying U.S. Highway 61 from New Orleans northwest to Baton Rouge and U.S. Highway 190 from Baton Rouge west over the Mississippi River on the Huey P. Long Bridge. US 190 continues west towards Opelousas on an extension built at roughly the same time.
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 2 (LA 2) is a state highway located in northern Louisiana. It runs 189.49 miles (304.95 km) in an east–west direction from the Texas state line southwest of Vivian to a junction with U.S. Highway 65 (US 65) near Lake Providence, just west of the Mississippi state line.
Louisiana Highway 10 (LA 10) is a state highway located in southern Louisiana. It runs 255.51 miles (411.20 km) in an east–west direction from U.S. Highway 171 (US 171) south of Leesville to the Mississippi state line east of Bogalusa.
Louisiana Highway 6 (LA 6) is a state highway located in western central Louisiana. It runs 54.52 miles (87.74 km) in an east–west direction from the Texas state line southwest of Many to U.S. Highway 71 (US 71) and U.S. Highway 84 (US 84) in Clarence.
Louisiana Highway 49 (LA 49) is a state highway located in Jefferson Parish, Louisiana. It runs 3.93 miles (6.32 km) in a north–south direction along Williams Boulevard from U.S. Highway 61 (US 61) to an intersection with Joe Yenni Boulevard and 44th Street in Kenner.
Louisiana Highway 76 (LA 76) is a state highway located in southeastern Louisiana. It runs 25.52 miles (41.07 km) in a general east–west direction from LA 77 in Maringouin to the junction of LA 1 and LA 987-4 in Port Allen.
Louisiana Highway 158 (LA 158) is a state highway located in Grant Parish, Louisiana. It runs 6.36 miles (10.24 km) in a north–south direction from LA 8 in Colfax to a junction of local roads near Lake Iatt, north of Colfax.
Louisiana Highway 107 is a state highway located in central Louisiana that runs 65.0 miles (104.6 km) in a north–south direction from U.S. Highway 71 in Morrow to a junction with LA 1250 in Pineville at the Pineville Expressway. Along the way, LA 107 services Cottonport, Mansura, and Marksville, intersecting routes such as LA 29, LA 114, and LA 1. LA 107 has significant concurrencies with both LA 1 and LA 115 in the vicinity of Marksville.
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SR 32 at Poydras 
SR 2 / SR 33 in New Orleans 
US 51 / SR 53 at Laplace 
US 71 / US 190 / SR 3 / SR 7 in Baton Rouge 
US 165 / SR 14 in Alexandria 
US 84 / SR 6 at Clarence 
US 171 / SR 42 at Mansfield 
US 79 / US 80 / SR 4 at Shreveport 
