When the original state highway system was created in 1921, it was designated as part of State Route 1, which followed the Jefferson Highway auto trail.
LA 3152 begins at an interchange with U.S. 90 and LA 48 (Jefferson Highway) at the east bank base of the Huey P. Long Bridge in Elmwood.
From the south, LA 3154 begins at an intersection with LA 48 (Jefferson Highway) in Harahan.
The route of LA 3261 once carried a small piece of the Jefferson Highway (State Route 1 in the pre-1955 Louisiana highway system) and U.S. 61 until 1928-1929 when Jefferson Highway was extended along the Orleans-Kenner interurban streetcar right-of-way from Shrewsbury Road to the Protection Levee at South Claiborne Avenue.
From the west, LA 426 begins at an intersection with LA 73 (Jefferson Highway) in Baton Rouge.
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The route roughly follows the original routing of Benton's Ferry Road, which started at Jefferson Highway (Hope Villa Road) and traversed to the Benton's Ferry crossing on the Amite River near the present-day Amite River bridges.
At the time, the main route between New Orleans and Baton Rouge was the Jefferson Highway, an auto trail which followed the modern River Road past Garyville.
From the south, LA 611-3 begins at an intersection with LA 611-1 (River Road) in Jefferson and, after passing the Jefferson Parish Streets Department facility, terminates at an intersection with U.S. 90 (Jefferson Highway).
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LA 3152 has since been extended south over South Clearview Parkway to U.S. 90/LA 48 (Jefferson Highway) at the Huey P. Long Bridge and north to I-10 over most of its former route.
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The route originally covered all of Little Farms Avenue from LA 48 (Jefferson Highway) to U.S. 61 but was shortened before being renumbered to LA 3155 in 1972.
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In its original form, the route of LA 611-3 included what was once a small piece of the Jefferson Highway (State Route 1 in the pre-1955 Louisiana highway system) and U.S. 61 prior to the direct extension of Jefferson Highway into South Claiborne Avenue in 1928.
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From the south, LA 611-12 began at an intersection with LA 48 (Jefferson Highway) in Harahan.
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After an intersection with U.S. 90 (Jefferson Highway), LA 611-4 continued northward to a dead end at the railroad tracks south of LA 3139 (Earhart Expressway).
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After an intersection with former LA 611-6 (Cicero Street), it continued northward to a terminus at U.S. 90 (Jefferson Highway).
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LA 611-2 continued along Central Avenue northward to a terminus at U.S. 90/LA 48 (Jefferson Highway).
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From the west, LA 611-6 began at an intersection with U.S. 90 (Jefferson Highway) in Jefferson.
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In December 1916, the route of today's LA 611-9 was designated as the New Orleans entrance of the Jefferson Highway.
When the Jefferson Highway auto trail was designated in 1916, Clay Cut and Hope Villa Roads became part of the new road (there is now another Claycut Road in Baton Rouge, located south of the present-day LA-73).
The current LA 77 follows the routing of the original Jefferson Highway, and the LA 77 alignment follows the old road to meet LA 10 West.
LA 942 carries what was once a small piece of the Jefferson Highway auto trail, designated in 1916, which became the original Louisiana Highway 1 in 1921.
LA 948 connects these highways to the paralleling LA 73 (Jefferson Highway) just to the east (where it ends).
State Highway 11 was one of the original twenty-six state highways proposed in 1917, overlaid on top of the 'Jefferson Highway.' In 1917 the routing was proposed from the Oklahoma border at Denison, south on present day U.S. Highway 69 through Whitewright into Greenville.
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