# Louisiana Highway 1

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.
The part south of U.S. Highway 90 near Raceland is Corridor 44, a National Highway System High Priority Corridor. From Alexandria to Shreveport, the LA 1 corridor was used for Interstate 49.
Between New Roads, Louisiana, and the interchange with Interstate 49 at Alexandria, Louisiana, LA 1 forms part of the Zachary Taylor Parkway.

## Route description

The southern terminus of LA 1 (29°15′37″N 89°57′49″W﻿ / ﻿29.2603°N 89.9637°W﻿ / 29.2603; -89.9637) is at a dead end in Grand Isle on the south bank of Bayou Rigaud. It heads southwest and west through Grand Isle, turning northwest where it meets LA 3090 (the road to Port Fourchon). At Leeville the road crosses Bayou Lafourche on the Leeville Bridge and begins to parallel the bayou on its west bank, heading through towns such as Golden Meadow, Larose, Lockport, Raceland, Thibodaux, Napoleonville and Paincourtville. At Donaldsonville, where the bayou meets the Mississippi River, LA 1 turns northwest to parallel the river. (Southeast of Donaldsonville, LA 18 and LA 3089/LA 3127 parallel the Mississippi.)
From Donaldsonville to Port Allen, across the Mississippi from Baton Rouge, LA 1 generally parallels the Mississippi River. It takes a relatively straight inland route, bypassing the curves of the river followed by LA 405 and LA 988. At Port Allen, it meets U.S. Highway 190 at the west end of the Huey P. Long Bridge, and turns west with US 190 to past Erwinville. There it turns back north, running along several back channels and oxbows of the Mississippi to New Roads (which is bypassed by LA 3131), and then heading west from New Roads to Morganza with LA 10 (still paralleling the Mississippi). From Morganza to Lettsworth, LA 1 heads northwest near the Mississippi; LA 15 begins in Lettsworth and continues north along the river while LA 1 continues generally northwest towards Alexandria.
LA 1 heads inland through such towns as Simmesport, Moreauville, and Marksville to Alexandria, where it meets the Pineville Expressway (U.S. Highway 165/LA 28). LA 1 turns southwest along its frontage roads - Fulton Street and Casson Street - along with LA 28 Business and U.S. Highway 167 Business to its end at Interstate 49, and continues southwest on Mason Street and northwest on Bolton Avenue.
From Alexandria to Shreveport, LA 1 generally parallels Interstate 49, including a bypass around Natchitoches. Louisiana Highway 1 Business runs through downtown Natchitoches before rejoining the original highway just northwest of the city limits. It passes through Shreveport on Youree Drive, Spring Street and Market Street, running concurrently with U.S. Highway 71 from Interstate 20 downtown to a split north of downtown. From Shreveport to the border with Texas, where LA 1 becomes State Highway 77, LA 1 passes through towns such as Oil City, Vivian and Rodessa.

## History

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. All were designated by various acts of the state legislature between 1921 and 1930. The routes were joined together under the single designation of LA 1 when the Louisiana Department of Highways renumbered the state highway system in 1955, creating a continuous route diagonally across the entire state.

## Future

The Louisiana Department of Transportation and Development (DOTD) is converting LA 1 from Golden Meadow to Port Fourchon into an elevated toll expressway called the Louisiana Highway 1 Bridge. These improvements are in order to facilitate evacuations of Port Fourchon and Grand Isle in the event of a hurricane, as LA 1 in this area is vulnerable to flooding, regardless of strength of storm.
When completed, the Gateway to the Gulf Expressway will be a 19-mile-long (31 km) elevated toll road from Golden Meadow to the Gulf of Mexico. Prior to mid-June 2012, tolls were collected using "open road tolling" technology; LA 1 was the first road or bridge in Louisiana to have tolls collected in this method. Travelers using the facilities were required to pre-pay either online, by phone, or at one of five kiosks north of the expressway, or use the "GeauxPass", an electronic toll collection transponder (or "toll tag") that collects tolls electronically. The GeauxPass is also compatible with the Crescent City Connection and all future Louisiana toll roads and the Lake Pontchartrain Causeway, but not the ferries.
Beginning in June 2012, a toll plaza was opened at the access ramp in Leeville. Vehicle drivers must now pay before accessing the expressway and the pre-pay kiosks have been removed from their respective sites. The toll plaza accepts cash or credit/debit cards. GeauxPass is still accepted. Funding for the project through taxes and grants was not available, leading to the requirement to pay for the construction via collecting tolls. By law, LA 1 toll revenues may only be utilized to repay construction loan debts for the expressway.
The first portion of this project, a two-lane toll bridge over Bayou Lafourche, opened on July 8, 2009. Tolling of the new bridge began on August 3, 2009. The two-lane section from Leeville to Port Fourchon opened on December 9, 2011. Construction on the section between Leeville and Golden Meadow began in late 2021 with a completion date to be determined. Long term plans include the eventual widening of the entire corridor to four lanes.

## Major intersections

| Parish | Location | mi | km | Destinations | Notes |
| Jefferson | Grand Isle | 0.000 | 0.000 | Dead end at Bayou Rigaud | Southern terminus |
| Jefferson | Grand Isle | 0.248 | 0.399 | LA 3151 (Humble Road) | Northern terminus of LA 3151 |
| Jefferson | Grand Isle | 1.410 | 2.269 | LA 3151 (Humble Road) | Southern terminus of LA 3151 |
| Jefferson | Grand Isle | 2.648 | 4.262 | LA 3150 (Minnich Lane) | Southern terminus of LA 3150 |
| Jefferson | Grand Isle | 2.739 | 4.408 | LA 574-9 (Cemetery Lane) | Southern terminus of LA 574-9 |
| Jefferson | Grand Isle | 2.779 | 4.472 | LA 574-8 (Landry Lane) | Southern terminus of LA 574-8 |
| Jefferson | Grand Isle | 2.850 | 4.587 | LA 574-7 (Hector Lane) | Southern terminus of LA 574-7 |
| Jefferson | Grand Isle | 3.035 | 4.884 | LA 574-6 (Niccari Lane) | Southern terminus of LA 574-6 |
| Jefferson | Grand Isle | 3.203 | 5.155 | LA 574-5 (Ludwig Lane) | Southern terminus of LA 574-5 |
| Jefferson | Grand Isle | 3.319 | 5.341 | LA 574-4 (Chighizola Lane) | Southern terminus of LA 574-4 |
| Jefferson | Grand Isle | 3.434 | 5.526 | LA 574-3 (Santiny Lane) | Southern terminus of LA 574-3 |
| Jefferson | Grand Isle | 6.437– 7.192 | 10.359– 11.574 | Bridge over Caminada Bay | Bridge over Caminada Bay |
| Jefferson | Grand Isle | 7.226 | 11.629 | LA 574-1 (Central Avenue) | |
| Lafourche | ​ | 15.958 | 25.682 | LA 3090 west (A.O. Rappelet Road) – Fourchon | Eastern terminus of LA 3090; southern end of elevated Gateway to the Gulf Expressway (signed as exit 16) |
| Lafourche | Leeville | 21.980– 23.424 | 35.373– 37.697 | Bridge over Bayou Lafourche | Bridge over Bayou Lafourche |
| Lafourche | Leeville | 24.218 | 38.975 | Old LA 1 – Leeville | Northern end of elevated Gateway to the Gulf Expressway (signed as exit 23) |
| Lafourche | ​ | 32.233 | 51.874 | LA 3235 north (South Alex Plaisance Boulevard) | Southern terminus of LA 3235 |
| Lafourche | Golden Meadow | 33.826 | 54.438 | LA 308 | Southeastern terminus of LA 308 |
| Lafourche | Galliano | 40.447 | 65.093 | LA 3162 to LA 308 | |
| Lafourche | Cut Off | 44.131 | 71.022 | LA 3161 – Leeville, Grand Isle | Eastern terminus of LA 3161 |
| Lafourche | Larose | 48.548 | 78.130 | LA 657 to LA 308 – Cut Off, Grand Isle | |
| Lafourche | Larose | 49.132– 49.519 | 79.070– 79.693 | West Larose Lift Bridge over Gulf Intracoastal Waterway | West Larose Lift Bridge over Gulf Intracoastal Waterway |
| Lafourche | ​ | 59.284 | 95.408 | LA 3220 (Bollinger Bridge Road) | Western terminus of LA 3220 |
| Lafourche | Lockport | 61.587– 61.657 | 99.115– 99.227 | Bridge over Company Canal | Bridge over Company Canal |
| Lafourche | Mathews | 64.162 | 103.259 | LA 654 | Western terminus of LA 654; to South Lafourche Leonard Miller Jr. Airport |
| Lafourche | Raceland | 66.869– 67.186 | 107.615– 108.125 | US 90 – Morgan City, New Orleans | Exits 215 (eastbound) and 215A (westbound) on US 90 |
| Lafourche | Raceland | 69.143 | 111.275 | LA 182 east – New Orleans | Southern end of LA 182 concurrency |
| Lafourche | Raceland | 69.677 | 112.134 | LA 182 west – Houma | Northern end of LA 182 concurrency |
| Lafourche | St. Charles | 77.493 | 124.713 | LA 649 (St. Charles Bypass Bridge) | Western terminus of LA 649 |
| Lafourche | ​ | 82.116 | 132.153 | LA 648 (Percy Brown Road) – Houma | |
| Lafourche | Thibodaux | 84.267 | 135.615 | LA 20 east (St. Patrick Bridge) – Vacherie | Southern end of LA 20 concurrency |
| Lafourche | Thibodaux | 84.395 | 135.821 | LA 20 west (Jackson Street) – Houma | Northern end of LA 20 concurrency |
| Lafourche | ​ | 86.061 | 138.502 | LA 3185 | |
| Lafourche | ​ | 87.485 | 140.793 | LA 309 (Brule Guillot Road) – Chacahoula | Eastern terminus of LA 309 |
| Assumption | ​ | 91.405 | 147.102 | LA 645 west | Eastern terminus of LA 645 |
| Assumption | ​ | 92.143 | 148.290 | LA 398 west | Eastern terminus of LA 398 |
| Assumption | Labadieville | 92.977 | 149.632 | LA 1247 west (Brule Road) | Southern end of LA 1247 concurrency |
| Assumption | Labadieville | 93.004 | 149.675 | LA 1247 east | Northern end of LA 1247 concurrency |
| Assumption | Supreme | 95.125 | 153.089 | LA 1011 | |
| Assumption | ​ | 96.102 | 154.661 | LA 400 | Eastern terminus of LA 400 |
| Assumption | ​ | 97.576 | 157.033 | LA 1010 west | Southern end of LA 1010 concurrency |
| Assumption | ​ | 97.911 | 157.572 | LA 1010 east | Northern end of LA 1010 concurrency |
| Assumption | Napoleonville | 101.772 | 163.786 | LA 401 (Canal Road) – Attakapas Landing | Eastern terminus of LA 401 |
| Assumption | Napoleonville | 101.941 | 164.058 | LA 1008 east (Franklin Avenue) | Southern end of LA 1008 concurrency |
| Assumption | Napoleonville | 102.092 | 164.301 | LA 1008 west | Northern end of LA 1008 concurrency |
| Assumption | ​ | 102.880 | 165.569 | LA 1007 | Eastern terminus of LA 1007 |
| Assumption | Munsons | 103.087 | 165.902 | LA 402 (Hospital Road) | |
| Assumption | Plattenville | 105.976 | 170.552 | LA 70 Spur – Sunshine Bridge | Western terminus of LA 70 Spur |
| Assumption | Paincourtville | 107.553 | 173.090 | LA 403 (St. Vincent Street) | |
| Assumption | Paincourtville | 107.676 | 173.288 | LA 1005 (Westfield Road) | Eastern terminus of LA 1005 |
| Assumption | ​ | 108.183 | 174.104 | LA 70 – Donaldsonville, Pierre Part | |
| Assumption | Klotzville | 109.526 | 176.265 | LA 1003 | Northeastern terminus of LA 1003 |
| Assumption | ​ | 110.273 | 177.467 | LA 1000 | Eastern terminus of LA 1000 |
| Assumption | ​ | 111.139 | 178.861 | LA 999 (Lula Road) | Eastern terminus of LA 999 |
| Assumption | Belle Rose | 112.031 | 180.296 | LA 998 | |
| Ascension | ​ | 114.843 | 184.822 | LA 943 | |
| Ascension | ​ | 115.066 | 185.181 | LA 944 | Eastern terminus of LA 944 |
| Ascension | Donaldsonville | 117.535 | 189.154 | LA 18 east (Veterans Boulevard) LA 3089 south (Marchand Drive) | Western terminus of LA 18; northern terminus of LA 3089 |
| Ascension | McCall | 120.685 | 194.224 | LA 943 | Northern terminus of LA 943 |
| Ascension | McCall | 120.831 | 194.459 | LA 405 | Southern terminus of LA 405 |
| Iberville | White Castle | 127.929 | 205.882 | LA 69 (Bowie Street) – Pierre Part, Belle River | To River Road Plantations |
| Iberville | ​ | 128.451 | 206.722 | LA 993 (Richland Road) | |
| Iberville | Bayou Goula | 131.417 | 211.495 | LA 69 (Augusta Road) | Northern terminus of LA 69 |
| Iberville | ​ | 135.990 | 218.855 | LA 992-3 (St. Louis Road) | Eastern terminus of LA 992-3 |
| Iberville | Plaquemine | 137.283 | 220.936 | LA 75 (Belleview Road) – Plaquemine Ferry | |
| Iberville | Plaquemine | 137.304 | 220.969 | LA 1251 | Western terminus of LA 1251 |
| Iberville | Plaquemine | 137.975 | 222.049 | LA 3066 (Court Street) | Eastern terminus of LA 3066 |
| Iberville | Plaquemine | 138.485 | 222.870 | LA 988 (Schnebelen Street) | Southern terminus of LA 988 |
| Iberville | Plaquemine | 138.619 | 223.086 | LA 77 north (Bayou Jacob Road) | Southern terminus of LA 77 |
| Iberville | ​ | 139.912– 139.923 | 225.167– 225.184 | LA 1148 east (Woodlawn Road) LA 1148 Truck (Industrial Boulevard) | Southern end of LA 1148 concurrency; eastern terminus of LA 1148 Truck |
| Iberville | ​ | 140.011 | 225.326 | LA 1148 west | Northern end of LA 1148 concurrency |
| West Baton Rouge | Addis | 142.994 | 230.127 | LA 990 (Addis Lane) | |
| West Baton Rouge | ​ | 144.958 | 233.287 | LA 989-1 (Lukeville Lane) | |
| West Baton Rouge | Brusly | 145.680 | 234.449 | LA 989-2 (Main Street) | |
| West Baton Rouge | ​ | 147.667 | 237.647 | LA 3237 (American Way) | Eastern terminus of LA 3237 |
| West Baton Rouge | ​ | 148.002 | 238.186 | LA 988 (Beaulieu Lane) | Northern terminus of LA 988 |
| West Baton Rouge | ​ | 148.903– 149.377 | 239.636– 240.399 | Bridge over Gulf Intracoastal Waterway | Bridge over Gulf Intracoastal Waterway |
| West Baton Rouge | Port Allen | 149.402– 150.135 | 240.439– 241.619 | I-10 – Baton Rouge, Lafayette | Exit 153 on I-10; to Port of Baton Rouge and Port Allen Lock via frontage road |
| West Baton Rouge | Port Allen | 150.567 | 242.314 | LA 76 west / LA 987-4 (Court Street) | Eastern terminus of LA 76; western terminus of LA 987-4 |
| West Baton Rouge | Port Allen | 151.326 | 243.536 | LA 986 (Rosedale Road) – Rosedale | |
| West Baton Rouge | Sunrise | 152.104 | 244.788 | LA 987-3 (Lafiton Lane) | |
| West Baton Rouge | ​ | 154.011– 154.892 | 247.857– 249.275 | US 190 east (Airline Highway) – Baton Rouge | Interchange; southern end of US 190 concurrency |
| West Baton Rouge | ​ | 154.379 | 248.449 | LA 987-1 (Bridgeside Road) | Western terminus of LA 987-1 |
| West Baton Rouge | Lobdell | 157.239– 157.272 | 253.052– 253.105 | LA 415 (Plantation Avenue, Loop Road) to I-10 | Interchange |
| West Baton Rouge | Lobdell | 157.863– 158.045 | 254.056– 254.349 | LA 415 Spur south (North Lobdell Highway) to I-10 / I-12 | Northern terminus of LA 415 Spur; northbound entrance and southbound exit |
| West Baton Rouge | Westover | 158.663 | 255.343 | LA 1145 south (Calumet Road) | Northern terminus of LA 1145 |
| West Baton Rouge | ​ | 162.610 | 261.695 | LA 983 north (Bueche Road) | Southern terminus of LA 983 |
| West Baton Rouge | Erwinville | 167.275 | 269.203 | LA 413 (Poydras Bayou Drive) to I-10 – Lakeland, Rosedale | To False River |
| Pointe Coupee | ​ | 169.065– 169.304 | 272.084– 272.468 | US 190 west (Airline Highway) – Opelousas | Northern end of US 190 concurrency |
| Pointe Coupee | Knapp | 173.488– 173.562 | 279.202– 279.321 | LA 416 – Lakeland | Western terminus of LA 416 |
| Pointe Coupee | Oscar | 175.957 | 283.175 | LA 978 (Bigman Lane) | Northern terminus of LA 978 |
| Pointe Coupee | Parlange | 177.516 | 285.684 | LA 78 south (Parlange Lane) – Opelousas | Northern terminus of LA 78 |
| Pointe Coupee | New Roads | 181.751 | 292.500 | LA 1 Bus. north (West Main Street) – New Roads | Southern terminus of LA 1 Bus. |
| Pointe Coupee | New Roads | 183.538 | 295.376 | LA 1 Bus. south / LA 10 east – St. Francisville | Northern terminus of LA 1 Bus.; southern end of LA 10 concurrency |
| Pointe Coupee | Labarre | 187.438 | 301.652 | LA 420 east (Pointe Coupee Road) | Western terminus of LA 420 |
| Pointe Coupee | Morganza | 191.350 | 307.948 | LA 10 west (Fordoche Bayou Road) | Northern end of LA 10 concurrency |
| Pointe Coupee | ​ | 194.011– 194.799 | 312.230– 313.499 | Bridge over Morganza Spillway | Bridge over Morganza Spillway |
| Pointe Coupee | Lacour Spur | 196.698 | 316.555 | LA 972 | Western terminus of LA 972 |
| Pointe Coupee | Batchelor | 199.457 | 320.995 | LA 419 | |
| Pointe Coupee | Innis | 202.281 | 325.540 | LA 418 – Angola Ferry | |
| Pointe Coupee | Lettsworth | 206.079 | 331.652 | LA 971 | Western terminus of LA 971 |
| Pointe Coupee | Keller | 207.631 | 334.150 | LA 15 north / LA 970 – Old River Lock, Angola Ferry | Southern terminus of LA 15 |
| Pointe Coupee | Legonier | 212.632 | 342.198 | LA 418 | Northern terminus of LA 418 |
| Pointe Coupee–Avoyelles parish line | Legonier–Simmesport line | 212.783– 213.533 | 342.441– 343.648 | Bridge over Atchafalaya River | Bridge over Atchafalaya River |
| Avoyelles | Simmesport | 213.681– 231.711 | 343.886– 372.903 | LA 105 south (South Martin Luther King Drive) – Avoyelles Parish Port | Northern terminus of LA 105 |
| Avoyelles | ​ | 215.598 | 346.971 | LA 1183 | Northern terminus of LA 1183 |
| Avoyelles | ​ | 222.379 | 357.884 | LA 114 west / LA 451 – Hamburg, Moreauville | Eastern terminus of LA 114; southern terminus of LA 451 |
| Avoyelles | Moreauville | 224.923 | 361.978 | LA 451 (Bayou Des Glaises Street) – Moreauville, Bordelonville | |
| Avoyelles | ​ | 227.384 | 365.939 | LA 1186 | Eastern terminus of LA 1186 |
| Avoyelles | Mansura | 229.701 | 369.668 | LA 107 south (L'Eglise Street) – Mansura | Southern end of LA 107 concurrency |
| Avoyelles | Marksville | 232.919 | 374.847 | LA 452 (South Preston Street) | Southern terminus of LA 452 |
| Avoyelles | Marksville | 233.026 | 375.019 | LA 1189 (Acton Road) | |
| Avoyelles | Marksville | 233.592 | 375.930 | LA 107 north / LA 115 (South Main Street) – Hessmer, Effie | Northern end of LA 107 concurrency |
| Avoyelles | ​ | 236.286 | 380.265 | LA 1191 | Western terminus of LA 1191 |
| Avoyelles | ​ | 237.170 | 381.688 | LA 1192 | Western terminus of LA 1192 |
| Avoyelles | ​ | 238.434 | 383.722 | LA 453 – Hickory Hill | Southern terminus of LA 453 |
| Avoyelles | ​ | 239.044 | 384.704 | LA 1195 | Southern terminus of LA 1195 |
| Avoyelles | Fifth Ward | 240.898 | 387.688 | LA 1194 | Western terminus of LA 1194; to Grand Cote National Wildlife Refuge |
| Avoyelles | Fifth Ward | 241.186 | 388.151 | LA 1194 Spur (Schoolhouse Road) | Western terminus of LA 1194 Spur (signed as LA 1194) |
| Avoyelles | ​ | 243.937 | 392.579 | LA 114 east – Hessmer | Western terminus of LA 114 |
| Rapides | Roxana | 247.325 | 398.031 | LA 457 north | Eastern terminus of LA 457 |
| Rapides | Richland | 250.923 | 403.821 | LA 1198 (Hathorne Road) | Southern terminus of LA 1198 |
| Rapides | Whittington | 252.433 | 406.252 | LA 3170 west to I-49 | Eastern terminus of LA 3170 |
| Rapides | Latanier | 254.850 | 410.141 | LA 457 | To Louisiana State University at Alexandria |
| Rapides | Alexandria | 262.514 | 422.475 | LA 1208-1 (Willow Glen River Road) to I-49 | Northern terminus of LA 1208-1 |
| Rapides | Alexandria | 264.467– 264.569 | 425.618– 425.783 | I-49 south / US 71 Byp. south / US 167 south – Opelousas US 167 north / LA 28 east (Pineville Expressway) US 167 Bus. / LA 28 Bus. begin | Exit 84 on I-49; northern terminus of US 167 Bus.; eastern terminus of LA 28 Bus.; southern end of US 167 Bus. and LA 28 Bus. concurrencies |
| Rapides | Alexandria | 264.910– 264.945 | 426.331– 426.388 | US 167 Bus. south (Mason Street, Overton Street) | Northern end of US 167 Bus. concurrency; one-way pair |
| Rapides | Alexandria | 265.312 | 426.978 | US 165 Bus. north / LA 1208-3 (Jackson Street) to I-49 | Southern end of US 165 Bus. concurrency; northern terminus of LA 1208-3 |
| Rapides | Alexandria | 265.683 | 427.575 | LA 28 Bus. west (Monroe Street) | Northern end of LA 28 Bus. concurrency |
| Rapides | Alexandria | 266.442– 266.856 | 428.797– 429.463 | US 71 / US 165 / LA 28 west (MacArthur Drive) to I-49 – Monroe, Baton Rouge, Lake Charles US 165 Bus. ends | Exit 70 on US 71; southern terminus of US 165 Bus.; northern end of US 165 Bus. concurrency |
| Rapides | Alexandria | 268.696 | 432.424 | LA 498 Spur (Powell Lane) | Northern terminus of LA 498 Spur |
| Rapides | Alexandria | 269.974– 270.184 | 434.481– 434.819 | LA 498 (Airbase Road) to I-49 | To Alexandria International Airport and England Airpark |
| Rapides | Boyce | 274.266 | 441.388 | PR 23 (Rapides Station Road) to I-49 | Exit 94 on I-49; location also known as Rapides |
| Rapides | Boyce | 278.179– 278.745 | 447.686– 448.597 | I-49 south – Alexandria | Exit 98 on I-49; access from LA 1 (both directions) to I-49 south and from I-49 north to LA 1 north |
| Rapides | Boyce | 279.335 | 449.546 | LA 1200 west (Haywood B. Joiner Sr. Street) to I-49 | Eastern terminus of LA 1200 |
| Rapides | ​ | 280.915 | 452.089 | LA 121 south | Northern terminus of LA 121; to Cotile Lake |
| Rapides | Rodemacher | 282.832 | 455.174 | LA 8 Spur to I-49 / LA 8 west – Leesville | Exit 103 on I-49; eastern terminus of LA 8 Spur (signed as LA 8) |
| Natchitoches | ​ | 289.022 | 465.136 | LA 3279 north (Parish Road) – Marco | Southern terminus of LA 3279 |
| Natchitoches | Galbraith | 291.023 | 468.356 | LA 490 east – Marco | Southern end of LA 490 concurrency |
| Natchitoches | ​ | 293.400 | 472.182 | LA 490 west – Chopin | Northern end of LA 490 concurrency |
| Natchitoches | ​ | 296.496– 296.527 | 477.164– 477.214 | LA 495 north | Eastern terminus of LA 495 |
| Natchitoches | Cloutierville | 298.298– 298.350 | 480.064– 480.148 | LA 491 north | Southern terminus of LA 491 (signed as LA 495) |
| Natchitoches | Derry | 299.921 | 482.676 | LA 119 – Gorum | To Kisatchie National Forest |
| Natchitoches | Montrose | 303.729 | 488.804 | LA 493 west – Red Dirt | Southern end of LA 493 concurrency; to Kisatchie National Forest |
| Natchitoches | Montrose | 304.085 | 489.377 | LA 493 north (Parish Road) | Northern end of LA 493 concurrency |
| Natchitoches | Cypress | 307.652 | 495.118 | LA 120 west to I-49 LA 494 east – Bermuda | Eastern terminus of LA 120; western terminus of LA 494 |
| Natchitoches | Natchez | 311.890 | 501.938 | LA 119 south – Bermuda | Northern terminus of LA 119 |
| Natchitoches | Natchitoches | 314.390 | 505.962 | LA 478 west | Eastern terminus of LA 478 |
| Natchitoches | ​ | 315.750 | 508.150 | LA 1 Bus. north – Natchitoches | Southern terminus of LA 1 Bus. |
| Natchitoches | Natchitoches | 319.789– 319.807 | 514.651– 514.679 | LA 6 west / LA 6 Bus. east (University Parkway) to I-49 – Natchitoches, Many | Western terminus of LA 6 Bus.; southern end of LA 6 concurrency; to Northwestern State University |
| Natchitoches | Natchitoches | 321.338 | 517.143 | LA 1 Bus. south / LA 3191 north (Texas Street) | Northern terminus of LA 1 Bus.; southern terminus of LA 3191 |
| Natchitoches | Natchitoches | 321.768 | 517.835 | LA 6 east (Highway 3175 Bypass) – Clarence, Winnfield | Northern end of LA 6 concurrency |
| Natchitoches | ​ | 324.453 | 522.156 | LA 3191 south | Northern terminus of LA 3191 |
| Natchitoches | Powhatan | 331.224 | 533.053 | LA 485 south – Allen | Northern terminus of LA 485 |
| Red River | Lake End | 338.152 | 544.203 | LA 174 west to I-49 – Pleasant Hill | Eastern terminus of LA 174 |
| Red River | Armistead | 345.638 | 556.250 | US 84 east / US 371 – Coushatta | Southern end of US 84 concurrency |
| Red River | Gahagan | 348.451 | 560.778 | LA 177 south – Evelyn | Northern terminus of LA 177 |
| Red River | Grand Bayou | 353.683 | 569.198 | US 84 west – Mansfield, Logansport | Northern end of US 84 concurrency |
| Red River | ​ | 357.174 | 574.816 | LA 509 south – Clear Lake | Northern terminus of LA 509 |
| Caddo | Gayles | 374.778 | 603.147 | LA 175 south (Gayle Red Bluff Road) – Frierson | Northern terminus of LA 175 |
| Caddo | Shreveport | 380.740– 380.754 | 612.742– 612.764 | LA 523 west (East Flournoy Lucas Road) | Eastern terminus of LA 523; location also known as Lucas |
| Caddo | Shreveport | 383.133 | 616.593 | LA 526 (Bert Kouns Industrial Loop Expressway) to I-49 | |
| Caddo | Shreveport | 384.022 | 618.024 | LA 511 (East 70th Street) | |
| Caddo | Shreveport | 386.594 | 622.163 | LA 3032 east (East Kings Highway) – Bossier City | Western terminus of LA 3032 |
| Caddo | Shreveport | 389.038– 389.513 | 626.096– 626.860 | I-20 / US 71 south to I-49 – Monroe, Dallas | Exit 19A on I-20; southern end of US 71 concurrency |
| Caddo | Shreveport | 389.809 | 627.337 | US 79 / US 80 (Texas Street) | |
| Caddo | Shreveport | 390.035 | 627.700 | LA 173 north (Caddo Street) | Southern terminus of LA 173 |
| Caddo | Shreveport | 390.275– 390.301 | 628.087– 628.129 | Airport Drive – Shreveport Downtown Airport | |
| Caddo | Shreveport | 390.815 | 628.956 | LA 3036 west (North Common Street) to I-20 | Eastern terminus of LA 3036 |
| Caddo | Shreveport | 391.474 | 630.016 | LA 3049 north (North Thomas Drive) | Southern terminus of LA 3049 |
| Caddo | Shreveport | 391.868– 391.876 | 630.650– 630.663 | LA 3094 south (North Hearne Avenue) | Northern terminus of LA 3094; to Shreveport Downtown Airport via North Hearne Avenue northbound |
| Caddo | Shreveport | 393.066– 393.504 | 632.578– 633.283 | I-220 to I-49 south – Monroe, Dallas | Exit 7A on I-220 |
| Caddo | Shreveport | 393.584– 393.645 | 633.412– 633.510 | LA 3194 west (Martin Luther King Jr. Drive) | Eastern terminus of LA 3194; to Southern University |
| Caddo | Shreveport | 395.093– 396.296 | 635.841– 637.777 | US 71 north | Interchange; northern end of US 71 concurrency |
| Caddo | Shreveport | 395.371– 395.637 | 636.288– 636.716 | Pine Hill Road – Blanchard | |
| Caddo | ​ | 397.491– 397.705 | 639.700– 640.044 | I-49 – Shreveport, Texarkana | Exit 215 on I-49 |
| Caddo | Blanchard | 398.320– 398.348 | 641.034– 641.079 | LA 538 (Old Mooringsport Road) | |
| Caddo | Blanchard | 401.529 | 646.198 | LA 173 (Dixie-Blanchard Road) – Blanchard, Dixie | |
| Caddo | ​ | 406.522 | 654.234 | LA 169 (Dixie-Mooringsport Road) – Mooringsport, Dixie | To Caddo Lake Dam |
| Caddo | ​ | 407.769– 407.951 | 656.241– 656.533 | Bridge over Caddo Lake | Bridge over Caddo Lake |
| Caddo | ​ | 409.116– 409.149 | 658.408– 658.461 | LA 538 | |
| Caddo | Oil City | 411.549 | 662.324 | LA 530 east (Allen Street) – Belcher | Western terminus of LA 530 |
| Caddo | ​ | 414.772 | 667.511 | LA 538 south | Northern terminus of LA 538 |
| Caddo | ​ | 416.015– 416.045 | 669.511– 669.560 | LA 2 west (Trees City Road) – Jefferson, TX | Southern end of LA 2 concurrency |
| Caddo | Vivian | 419.479 | 675.086 | LA 2 east / LA 170 east (Camp Road) | Northern end of LA 2 concurrency; southern end of LA 170 concurrency |
| Caddo | Vivian | 420.431 | 676.618 | LA 170 west (West Tennessee Avenue) | Northern end of LA 170 concurrency |
| Caddo | Rodessa | 427.398 | 687.830 | LA 168 east (East Main Street) – Ida | Western terminus of LA 168 |
| Caddo | ​ | 431.877 | 695.039 | SH 77 west – Atlanta | Northern terminus; continuation in Texas |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access ||||||

## Special routes
### Natchitoches business route

In Natchitoches, LA 1 Bus. follows the original route of LA 1 before its re-routing onto a bypass on the south and west side of town in 1975.
The entire highway is in Natchitoches Parish.
| Location | mi | km | Destinations | Notes |
| ​ | 0.000 | 0.000 | LA 1 – Alexandria, Shreveport | Southern terminus |
| Natchitoches | 1.003 | 1.614 | LA 1223 north (Rapides Drive) | Southern terminus of LA 1223 |
| Natchitoches | 2.148 | 3.457 | LA 494 west (Keyser Avenue) | Southern end of LA 494 concurrency |
| Natchitoches | 2.304 | 3.708 | LA 494 east (Keyser Avenue) | Northern end of LA 494 concurrency |
| Natchitoches | 2.772 | 4.461 | LA 1224 east (Williams Avenue) | Western terminus of LA 1224 |
| Natchitoches | 2.782– 2.867 | 4.477– 4.614 | Bridge over Cane River Lake | Bridge over Cane River Lake |
| Natchitoches | 2.874 | 4.625 | LA 6 Bus. (Front Street) – Clarence, Winnfield | |
| Natchitoches | 4.736– 4.767 | 7.622– 7.672 | LA 1 / LA 6 – Alexandria, Shreveport LA 3191 north (Texas Street) | Northern terminus of LA 1 Bus.; southern terminus of LA 3191 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||

### New Roads business route

In New Roads, LA 1 Bus. follows the original route of LA 1 through the town center before its re-routing onto the former LA 3131. The route was bypassed in 2010 when construction of the new John James Audubon Bridge over the Mississippi River led to a realignment of highway routes in the area.
The entire highway is in Pointe Coupee Parish.
| Location | mi | km | Destinations | Notes |
| New Roads | 0.000 | 0.000 | LA 1 south (False River Drive) – Baton Rouge, Opelousas LA 1 (Hospital Road) to LA 10 – Morganza, Alexandria | Southern terminus; to False River Regional Airport |
| New Roads | 1.852 | 2.981 | LA 413 (East Main Street) | Northern terminus of LA 413 |
| New Roads | 2.421 | 3.896 | LA 10 Bus. east (New Roads Street) – St. Francisville | Southern end of LA 10 Bus. concurrency |
| ​ | 4.017 | 6.465 | LA 10 east – St. Francisville LA 10 Bus. ends | Northern end of LA 10 Bus. concurrency; southern end of LA 10 concurrency; western terminus of LA 10 Bus. |
| New Roads | 4.924 | 7.924 | LA 1 south (Hospital Road) – Baton Rouge, Opelousas LA 1 north / LA 10 west – Morganza, Alexandria | Northern terminus; northern end of LA 10 concurrency |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus |||||