# Interstate 10 in Louisiana

Interstate 10 (I-10), a major transcontinental Interstate Highway in the Southern United States, runs across the southern part of Louisiana for 274.42 miles (441.64 km) from Texas to Mississippi. It passes through Lake Charles, Lafayette, and Baton Rouge, dips south of Lake Pontchartrain to serve the New Orleans metropolitan area, then crosses Lake Pontchartrain and leaves the state.

## Route description

I-10 enters Louisiana at the state's southwestern corner from Orange, Texas, in a concurrency with US Route 90 (US 90), which leaves the freeway at the first exit. The two routes closely parallel each other through much of the state. The first community I-10 approaches in the state is Vinton, Louisiana. Between Sulphur and Lake Charles there is an interchange with I-210. I-10 crosses the Calcasieu River Bridge into Lake Charles, passing north of the center of town, before meeting the western end of I-210. Between Lake Charles and Lafayette, I-10 bypasses several small towns including Iowa, Welsh, Jennings, and Crowley. In Lafayette, I-10 meets the current southern terminus of I-49, leaving northwest out of the city and passing by the community of Breaux Bridge.
From Lafayette, the highway heads east-northeast toward Baton Rouge via the Atchafalaya Swamp Freeway, an 18.2-mile (29.3 km) bridge across the Atchafalaya River and its accompanying swamp. Between the two cities, I-10 parallels US 190, from Opelousas to Baton Rouge. This route has signs and is designated as an alternate I-10 bypass that runs from I-10/I-49 north to US 190 (exit 19B at Opelousas) then east across to Baton Rouge and back down to I-10 via I-110 south. Traffic can be diverted both ways along this route should there be the necessity to close I-10 across the Atchafalaya Swamp Freeway and is also used as a hurricane evacuation route.
In the capital of Baton Rouge, US 190 continues east alongside I-12 to Hammond and Slidell while I-10 turns southeastward and parallels US 61 (Airline Highway) to New Orleans. In the Crescent City, I-10 rejoins US 90 (and later US 11) as it heads toward Slidell. In Slidell, US 11 continues northeastward toward Hattiesburg, Mississippi while I-10 and US 90 turn eastward toward coastal Mississippi.
Major bridges on I-10 in Louisiana include the Sabine River Bridge (c. 1952, replaced 2003), the Lake Charles I-10 Bridge (1952), the Atchafalaya Swamp Freeway (1973), the Horace Wilkinson Bridge over the Mississippi River (1968), the Bonnet Carré Spillway Bridge (c. 1972), the Industrial Canal Bridge (c. 1960), Frank Davis "Naturally N'Awlins" Memorial Bridge (1965, replaced 2010), and the Pearl River Bridge (c. 1970).

## History

By the beginning of planning for the Interstate Highway System in 1939 (then called the Interregional Highway System), the Houston–New Orleans–Mobile corridor was part of the system. Preliminary plans took it along US 90 all the way through Louisiana, serving Lake Charles and Lafayette but not Baton Rouge. By c. 1943, it had been shifted to the north west of New Orleans, using the Louisiana Highway 12 (LA 12), US 190, and US 61 corridors, and serving Baton Rouge but not Lake Charles or Lafayette. The 1947 plan shifted it to roughly the current alignment, including the long stretch of new corridor across the Atchafalaya Swamp. The corridor was assigned the I-10 designation in mid-1957.
Prior to the gaining of federal funding for the Interstate System in the late 1950s, a toll road, the Acadian Thruway, had been proposed between Lafayette and a point near Gramercy on Airline Highway (US 61). This would have provided a shorter route than I-10, bypassing Baton Rouge to the south. The Gramercy Bridge was later built along its planned alignment, with LA 3125 connecting to Gramercy, but no road extends west from the bridge across the Atchafalaya Swamp to Lafayette.
I-12, serving as a bypass of New Orleans around the north side of Lake Pontchartrain, was not added until October 17, 1957. At the time, I-10 and I-59 split in eastern New Orleans, with I-59 following present I-10 and I-10 following the US 90 corridor into Mississippi, and so I-12 only ran to I-59 north of Slidell. By the mid-1960s, the routes had been realigned to their current configuration, with I-12 and I-59 both ending at I-10 near Slidell.
Construction of the Interstate Highway System in Louisiana began in 1957. Early I-10 contracts were done under the route designation LA 3027. Much of the early construction on the I-10 corridor was concentrated on relieving traffic problems in urban centers. Several such projects were already underway and were incorporated into the route of I-10 during construction, such as the Pontchartrain Expressway in New Orleans. In addition, the two major bridges on the route in Calcasieu Parish between the Texas state line and Lake Charles were built for US 90 in the early 1950s and retrofitted for I-10 traffic. Sections of I-10 through rural areas and/or those sections already served adequately by existing highways, such as Airline Highway (US 61) between Baton Rouge and New Orleans, were constructed later in the program. By the spring of 1975, the entire route of I-10 had been opened across Louisiana except for a problem 5.5-mile (8.9 km) section between Gonzales and Sorrento that was not completed for another three years.

### Timeline

| Segment | Year opened |
| Sabine River Bridge (Texas-Louisiana state line) | Existing US 90 bridge opened May 11, 1954 |
| Sabine River to Vinton | Existing US 90 opened May 11, 1954; upgraded to interstate standards and opened February 24, 1967 |
| Vinton to Sulphur | September 21, 1965 |
| Sulphur to Westlake | April 16, 1962 |
| Calcasieu River Bridge (Westlake-Lake Charles) | Existing US 90 bridge, opened September 28, 1951 |
| Calcasieu River to US 171 (Lake Charles) | April 3, 1963 |
| US 171 (Lake Charles) to US 165 (Iowa) | February 17, 1964 |
| US 165 (Iowa) to Welsh | December 9, 1964 |
| Welsh to Jennings | Spring 1965 |
| Jennings to Crowley | March 28, 1963 |
| Crowley to Duson | December 19, 1966 |
| Duson to US 167 (Lafayette) | October 30, 1968 |
| US 167 (Lafayette) to Grosse Tete (including Atchafalaya Basin Bridge) | March 12, 1973 |
| Grosse Tete to Lobdell | March 28, 1974 |
| Lobdell to Port Allen | November 7, 1970 |
| Baton Rouge Mississippi River Bridge (Port Allen-Baton Rouge) | April 10, 1968 |
| Baton Rouge Mississippi River to Perkins Road | September 18, 1964 |
| Baton Rouge Perkins Road to College Drive | October 1965 |
| Baton Rouge: College Drive to Highland Road | May 31, 1974 |
| Highland Road to Gonzales | December 19, 1974 |
| Gonzales to Sorrento | May 5, 1978 |
| Sorrento to LaPlace | April 16, 1975 |
| Laplace to Williams Boulevard (Kenner) (including Bonnet Carré Spillway Bridge) | December 17, 1971 |
| Jefferson Parish: Williams Boulevard to Veterans Highway (Metairie) | May 17, 1968 |
| Jefferson Parish: Veterans Memorial Boulevard to Causeway Boulevard (Metairie) | December 1967 |
| Jefferson Parish: Causeway Boulevard Metairie to Pontchartrain Expressway (New Orleans) | March 26, 1965 |
| New Orleans: Pontchartrain Expressway from Florida Avenue to Mound Avenue | October 4, 1962 |
| New Orleans: Pontchartrain Expressway from Mound Avenue to Airline Highway (US 61) | February 16, 1962 |
| New Orleans: Pontchartrain Expressway from Airline Highway (US 61) to Claiborne Avenue (US 90) | February 19, 1960 |
| New Orleans: Claiborne Expressway from Pontchartrain Expressway to Tulane Avenue | December 8, 1972 |
| New Orleans: Claiborne Expressway from Tulane Avenue to Orleans Avenue | June 16, 1969 |
| New Orleans: Claiborne Expressway from Orleans Avenue to St. Bernard Avenue | March 14, 1968 |
| New Orleans: Claiborne Expressway from St. Bernard Avenue to Franklin Avenue | February 27, 1968 |
| New Orleans: Claiborne Expressway from Franklin Avenue to Industrial Canal | April 1966 |
| New Orleans: Industrial Canal Bridge | December 21, 1965 |
| New Orleans: Industrial Canal to Morrison Road | December 8, 1966 |
| New Orleans: Morrison Road to Paris Road | October 18, 1972 |
| New Orleans: Paris Road to US 11 | April 24, 1967 |
| US 11 (New Orleans) to I-12/I-59 (Slidell) (including Lake Pontchartrain Twin Span Bridge) | December 21, 1965 |
| I-12/I-59 (Slidell) to East Pearl River | February 16, 1971 |
| Pearl River Bridge (Louisiana-Mississippi state line) | February 16, 1971 |
Reconstruction of the portion at the I-610 Split vicinity was undertaken in the late 1990s. Also in the late 1990s, further work was done on the expressway as two ramps were constructed, connecting West I-10 to West Business U.S. 90 and westbound Claiborne Avenue (West US 90), replacing an earlier, more dangerous ramp. The direct ramp from 90B East to I-10 East was completed by 1989.
In the aftermath of Hurricane Katrina, the I-10 Twin Span Bridge, a portion of I-10 between New Orleans and Slidell, spanning the eastern end of Lake Pontchartrain, was severely damaged, causing a break in I-10 at that point. Unlike the Escambia Bay Bridge (east of Pensacola, Florida and damaged by Hurricane Ivan), which is a major artery, I-12 is available to bypass New Orleans. Taking I-12 to the Lake Pontchartrain Causeway allowed entry and exit to and from the Greater New Orleans area from the East. On October 14, 2005, at 3:00 pm, the eastbound span was reopened to two way traffic. On January 6, 2006, at 6:00 am, both lanes of the westbound span were reopened to traffic using temporary metal trusses and road panels to replace damaged sections. This restored all four lanes of the I-10 Twin Span for normal traffic with a 45 mph (72 km/h) speed limit for the westbound lanes and 60 mph (97 km/h) for the eastbound lanes. Oversized and overweight traffic was prohibited until a new permanent six-lane span replaced the two temporarily repaired spans. The eastbound span opened to traffic on July 9, 2009, and the westbound span opened on April 7, 2010, with the old bridge being permanently closed. The approaches to the westbound lanes were completed with a ribbon cutting ceremony on September 8, 2011, and the opening of all six lanes the next morning. The old Twin Span will be demolished in the near future. In 2014, the Louisiana State Legislature officially named the Twin Span as the Frank Davis "Naturally N'Awlins" Memorial Bridge.
A $68.9 million three-year construction project was completed between Causeway Boulevard and the 17th Street Canal in Metairie, Louisiana. It added new lanes in both directions and improve the exit and entrance ramps at Causeway and Bonnabel Boulevard.
In 2012, the state completed a widening project between Causeway and Clearview Parkway and between the I-10/I-610 split and Airline Highway (US 61). In 2015, the additional lanes were extended in Metairie, from Clearview Parkway west to Veterans Boulevard.
I-10 was widened to three lanes in each direction from the I-10/I-12 split to Highland Road (exit 166) from late 2008 to spring 2013.
On April 8, 2017, Louisiana DOTD broke ground on the reconstruction of seven miles (11 km) of I-10 between I-49 (exit 103) and the Atchafalaya Basin. A center concrete barrier was constructed, the road was repaved, and an extra travel lane was constructed, making I-10 three lanes in each direction. Construction began May 2017, was completed in October 2021, and had a ribbon cutting ceremony on November 22, 2021.
In order to reduce the amount of congestion for travelers trying to reach the Louis Armstrong New Orleans International Airport, flyover ramps were constructed at the I-10 and Loyola Drive Interchange in Kenner. Part of the project is constructing a diverging diamond interchange where both of the roads meet as well. The project connected I-10 to the new terminal at the airport that was completed in November 2019 and allowed quick access to a planned station on the proposed Baton Rouge–New Orleans Amtrak route on the south side of the airport. Construction began after the terminal was completed and was expected to be completed in November 2022. However, supply chain problems and the damage caused by Hurricane Ida in 2021 delayed the completion of the project to early-2023. Rainy weather during the Summer of 2022 further delayed the completion of the project to the Summer of 2023. Work on the diverging diamond interchange, which will be the first ever constructed in the state, was not to be started until the completion of the flyover bridges. The I-10 westbound ramp to Loyola Drive was finally opened to traffic on September 29, 2023; the ramp from the airport to I-10 east opened two weeks later on October 13. The diverging diamond opened on October 30.

## Future

There are calls to remove I-10 from the Claiborne Expressway in New Orleans and rename I-610 to I-10. The entire length of the Pontchartrain Expressway would likely be renamed as I-910 or I-49. The movement to remove the expressway received backing from President Biden in April 2021. However, opponents of the removal, which could cost over $4 billion, pointed out that removing the road would increase and worsen traffic through the area as well as in other neighborhoods among other things. Instead, in October 2022, the governments of Louisiana and New Orleans introduced a $94.7 million proposal to improve the elevated freeway and the space beneath it as well remove four ramps in Tremé. They proposal asked for a $47 million grant for the project.
In 2022, the Calcasieu River Bridge turned 70 years old. With over 600,000 bridges, the average bridge age in the United States is 42 years old, with one in nine rated as deficient. Louisiana has a total of 13,050 bridges, and 1,827 (14%) are considered deficient. 1,963 bridges (15%) are considered functionally obsolete. It had been decided the bridge needed replacing since before 2002. There are several areas of concern including the age of the bridge, the low bridge ratings, steep grades, traffic congestion, amount of traffic that has been estimated at around 55,000 vehicles a day, low vertical traffic clearance, and contamination. These contributing factors rank the bridge as "a dangerous bridge" and 7th in the nation in need of replacing. In 2023, a plan was vetoed on the replacement bridge due to tolls being proposed. This made the project on hold until 2024 when a plan was approved that would include tolls, with especially high prices for trucks.

## Exit list

| Parish | Location | mi | km | Exit | Destinations | Notes |
| Sabine River | Sabine River | 0.00 | 0.00 | | I-10 west / US 90 west – Beaumont, Houston | Continuation into Orange, Texas |
| Sabine River | Sabine River | 0.00– 0.5 | 0.00– 0.80 | Louisiana–Texas line | Louisiana–Texas line | Louisiana–Texas line |
| Calcasieu | ​ | 0.6 | 0.97 | 1 | Sabine River Turnaround | Westbound exit and eastbound entrance |
| Calcasieu | Toomey | 4.0– 4.4 | 6.4– 7.1 | 4 | US 90 east to LA 109 – Toomey, Starks | East end of US 90 concurrency |
| Calcasieu | Vinton | 7.4– 7.8 | 11.9– 12.6 | 7 | LA 3063 – Vinton | Southern terminus of LA 3063 |
| Calcasieu | Vinton | 8.7– 9.3 | 14.0– 15.0 | 8 | LA 108 – Vinton | Western terminus of LA 108 |
| Calcasieu | Sulphur | 20.3– 21.0 | 32.7– 33.8 | 20 | LA 1256 to LA 27 – Sulphur, Cameron | Northern terminus of LA 1256 |
| Calcasieu | Sulphur | 21.4– 21.9 | 34.4– 35.2 | 21 | LA 27 – DeQuincy | |
| Calcasieu | Sulphur | 23.4– 23.9 | 37.7– 38.5 | 23 | LA 108 – Industries, Sulphur | |
| Calcasieu | ​ | 24.9– 25.7 | 40.1– 41.4 | 25 | I-210 east (Lake Charles By-Pass) | Western terminus of I-210 (exit 1 on I-210) |
| Calcasieu | ​ | 26.1– 27.1 | 42.0– 43.6 | 26 | US 90 west / PPG Drive / Trousdale Road | West end of US 90 concurrency; eastbound signed as "PPG Drive" only |
| Calcasieu | Westlake | 27.7– 28.0 | 44.6– 45.1 | 27 | LA 378 – Westlake | Southern terminus of LA 378 |
| Calcasieu | Calcasieu River | 28.0– 29.3 | 45.1– 47.2 | Louisiana Memorial World War II Bridge | Louisiana Memorial World War II Bridge | Louisiana Memorial World War II Bridge |
| Calcasieu | Lake Charles | 29.5– 30.2 | 47.5– 48.6 | 29 | LA 1262 (Lakeshore Drive) – Downtown Area | Northern terminus of LA 1262; signed as exit 30A westbound |
| Calcasieu | Lake Charles | 30.4– 30.7 | 48.9– 49.4 | 30B | Ryan Street – Downtown Area | Eastbound entrance and westbound exit |
| Calcasieu | Lake Charles | 31.0– 31.5 | 49.9– 50.7 | 31A | US 90 Bus. (Enterprise Boulevard) | Western terminus of US 90 Bus.; additional westbound entrance from Kirkman Street |
| Calcasieu | Lake Charles | 31.7– 32.0 | 51.0– 51.5 | 31B | US 90 east to LA 14 Shattuck Street | Eastbound signage; east end of US 90 concurrencyWestbound signage |
| Calcasieu | Lake Charles | 32.4– 32.7 | 52.1– 52.6 | 32 | Opelousas Street | No eastbound entrance |
| Calcasieu | Lake Charles | 32.7– 33.3 | 52.6– 53.6 | 33 | US 171 north – DeRidder, Shreveport To LA 14 – Cameron | Access to LA 14 via US 171 south; LA 14 not signed eastbound; eastbound access to US 171 south via exit 32 |
| Calcasieu | ​ | 33.8– 34.4 | 54.4– 55.4 | 34 | I-210 west (Lake Charles By-Pass) | Eastern terminus of I-210 (exit 12 on I-210) |
| Calcasieu | ​ | 35.8– 36.4 | 57.6– 58.6 | 36 | LA 397 – Creole, Cameron | |
| Calcasieu | Iowa | 42.8– 43.1 | 68.9– 69.4 | 43 | LA 383 – Iowa | |
| Jefferson Davis | ​ | 44.3– 44.6 | 71.3– 71.8 | 44 | US 165 – Kinder, Alexandria | |
| Jefferson Davis | Lacassine | 47.9– 48.2 | 77.1– 77.6 | 48 | LA 101 – Lacassine | |
| Jefferson Davis | Welsh | 54.3– 54.6 | 87.4– 87.9 | 54 | LA 99 – Welsh | |
| Jefferson Davis | Roanoke | 59.1– 59.5 | 95.1– 95.8 | 59 | LA 395 – Roanoke | |
| Jefferson Davis | Jennings | 63.6– 64.1 | 102.4– 103.2 | 64 | LA 26 – Elton, Jennings | |
| Jefferson Davis | Jennings | 65.7– 66.1 | 105.7– 106.4 | 65 | LA 97 – Evangeline, Jennings | |
| Acadia | ​ | 71.8– 72.2 | 115.6– 116.2 | 72 | Egan | To LA 91/LA 100 via Trumps Road (not signed) |
| Acadia | ​ | 75.8– 76.2 | 122.0– 122.6 | 76 | LA 91 – Iota, Estherwood | |
| Acadia | Crowley | 80.4– 81.0 | 129.4– 130.4 | 80 | LA 13 – Eunice, Crowley | |
| Acadia | Crowley | 81.8– 82.3 | 131.6– 132.4 | 82 | LA 1111 – East Crowley | |
| Acadia | Rayne | 87.5– 88.0 | 140.8– 141.6 | 87 | LA 35 / LA 98 – Church Point, Rayne | |
| Acadia | Duson | 92.2– 92.6 | 148.4– 149.0 | 92 | LA 95 – Mire, Duson | |
| Lafayette | Scott | 97.3– 97.7 | 156.6– 157.2 | 97 | LA 93 – Cankton, Scott | |
| Lafayette | Lafayette | 99.7– 100.2 | 160.5– 161.3 | 100 | US 167 (Ambassador Caffery Parkway) / LA 3184 | Northern terminus of LA 3184 |
| Lafayette | Lafayette | 101.6– 102.2 | 163.5– 164.5 | 101 | LA 182 north (North University Avenue) | West end of LA 182 concurrency |
| Lafayette | Lafayette | 102.9– 103.5 | 165.6– 166.6 | 103 | I-49 north / US 167 north / LA 182 south to US 90 – Opelousas, Morgan City | Current southern terminus and exits 1A-B on I-49; east end of LA 182 concurrency; signed as exits 103A (south) and 103B (north) |
| Lafayette | Lafayette | 104.1– 105.0 | 167.5– 169.0 | 104 | Louisiana Avenue | |
| St. Martin | Breaux Bridge | 109.4– 109.9 | 176.1– 176.9 | 109 | LA 328 – Breaux Bridge | |
| St. Martin | ​ | 114.6– 115.2 | 184.4– 185.4 | 115 | LA 347 – Cecilia, Henderson | |
| St. Martin | Atchafalaya Basin | 117.3 | 188.8 | West end of Louisiana Airborne Memorial Bridge | West end of Louisiana Airborne Memorial Bridge | West end of Louisiana Airborne Memorial Bridge |
| St. Martin | Atchafalaya Basin | 121.4– 121.7 | 195.4– 195.9 | 121 | LA 3177 – Butte LaRose | Northern terminus of LA 3177; to Atchafalaya Welcome Center |
| Iberville | Atchafalaya Basin | 127.3– 127.6 | 204.9– 205.4 | 127 | LA 975 – Whiskey Bay | Southern terminus of LA 975 |
| Iberville | Atchafalaya Basin | 135.1 | 217.4 | East end of Louisiana Airborne Memorial Bridge | East end of Louisiana Airborne Memorial Bridge | East end of Louisiana Airborne Memorial Bridge |
| Iberville | Ramah | 135.2– 135.5 | 217.6– 218.1 | 135 | LA 3000 – Ramah, Maringouin | Southern terminus of LA 3000; to LA 76 (not signed) |
| Iberville | Grosse Tete | 139.3– 139.9 | 224.2– 225.1 | 139 | LA 77 – Rosedale, Grosse Tete | |
| West Baton Rouge | ​ | 151.1– 151.7 | 243.2– 244.1 | 151 | LA 415 to US 190 – Lobdell | Southern terminus of LA 415 |
| West Baton Rouge | Port Allen | 153.2– 153.8 | 246.6– 247.5 | 153 | LA 1 – Port Allen, Plaquemine | |
| Mississippi River | Mississippi River | 153.4– 155.0 | 246.9– 249.4 | Horace Wilkinson Bridge | Horace Wilkinson Bridge | Horace Wilkinson Bridge |
| East Baton Rouge | Baton Rouge | 154.8 | 249.1 | 155A | LA 30 (Nicholson Drive) / Highland Road – LSU | Eastbound exit and westbound entrance |
| East Baton Rouge | Baton Rouge | 155.1– 155.6 | 249.6– 250.4 | 155B | I-110 north – Downtown, Metro Airport | Southern terminus of I-110; exit 1I-J on I-110 |
| East Baton Rouge | Baton Rouge | 155.9 | 250.9 | 155C | Louise Street | Eastbound entrance and westbound exit |
| East Baton Rouge | Baton Rouge | 155.7 | 250.6 | 156A | Washington Street | Eastbound exit and westbound entrance |
| East Baton Rouge | Baton Rouge | 156.2 | 251.4 | 156B | Dalrymple Drive – LSU | No eastbound entrance |
| East Baton Rouge | Baton Rouge | 156.9– 157.1 | 252.5– 252.8 | 157A | Perkins Road | Eastbound exit and westbound entrance |
| East Baton Rouge | Baton Rouge | 157.2– 157.7 | 253.0– 253.8 | 157B | Acadian Thruway (LA 427) – LSU | |
| East Baton Rouge | Baton Rouge | 157.9– 158.3 | 254.1– 254.8 | 158 | College Drive | |
| East Baton Rouge | Baton Rouge | 159.3– 160.0 | 256.4– 257.5 | 159 | I-12 east – Hammond | Western terminus of I-12 (exit 1A on I-12) |
| East Baton Rouge | Baton Rouge | 160.4– 161.0 | 258.1– 259.1 | 160 | LA 3064 (Essen Lane) | |
| East Baton Rouge | ​ | 161.6– 163.3 | 260.1– 262.8 | 162 | LA 1248 (Bluebonnet Boulevard) Mall of Louisiana Boulevard | Northern terminus of LA 1248; signed as exit 162A (LA 1248) and 162B (Mall of Louisiana Boulevard) both directions; exits combined westbound |
| East Baton Rouge | ​ | 162.9– 163.8 | 262.2– 263.6 | 163 | LA 3246 (Siegen Lane) | |
| East Baton Rouge | ​ | | | 164 | Pecue Lane | Construction on a new interchange |
| East Baton Rouge | Kleinpeter | 166.5– 167.1 | 268.0– 268.9 | 166 | LA 42 (Highland Road) LA 427 (Perkins Road) | |
| Ascension | Prairieville | 172.6– 173.2 | 277.8– 278.7 | 173 | Old Jefferson Highway (LA 73) – Prairieville, Geismar | |
| Ascension | Gonzales | 177.2– 177.9 | 285.2– 286.3 | 177 | LA 30 – Gonzales, St. Gabriel | |
| Ascension | Gonzales | 179.3– 180.0 | 288.6– 289.7 | 179 | LA 44 – Gonzales, Burnside | |
| Ascension | Sorrento | 182.3– 183.0 | 293.4– 294.5 | 182 | LA 22 – Sorrento, Donaldsonville | |
| Ascension | ​ | 186.9 | 300.8 | 187 | US 61 south (Airline Highway) – Gramercy | Eastbound exit and westbound entrance |
| Ascension | ​ | 187.5 | 301.8 | 187 | US 61 north (Airline Highway) – Sorrento | Westbound exit and eastbound entrance |
| St. James | ​ | 194.5– 195.1 | 313.0– 314.0 | 194 | LA 641 south – Gramercy, Lutcher | Northern terminus of LA 641 |
| St. John the Baptist | LaPlace | 205.6– 206.3 | 330.9– 332.0 | 206 | LA 3188 south – LaPlace | Northern terminus of LA 3188 |
| St. John the Baptist | LaPlace | 209.1– 209.8 | 336.5– 337.6 | 209 | US 51 to I-55 north – Hammond, LaPlace | To I-55 signed eastbound only |
| St. John the Baptist | Bonnet Carré Spillway | 209.2 | 336.7 | West end of I-10 Bonnet Carré Spillway Bridge | West end of I-10 Bonnet Carré Spillway Bridge | West end of I-10 Bonnet Carré Spillway Bridge |
| St. John the Baptist | Bonnet Carré Spillway | 210.1 | 338.1 | 210 | I-55 north – Hammond | Southern terminus of I-55 (exit 1 on I-55); eastbound entrance and westbound exit |
| St. Charles | Bonnet Carré Spillway | 219.6– 220.8 | 353.4– 355.3 | 220 | I-310 south – Boutte, Houma | Northern terminus and exits 1-1A on I-310 |
| Jefferson | Bonnet Carré Spillway | 221.1 | 355.8 | East end of I-10 Bonnet Carré Spillway Bridge | East end of I-10 Bonnet Carré Spillway Bridge | East end of I-10 Bonnet Carré Spillway Bridge |
| Jefferson | Kenner | 221.2– 222.0 | 356.0– 357.3 | 221 | Loyola Drive / N. O. Int'l Airport | Signed as exit 221A (N. O. Int'l Airport) and 221B (Loyola Drive) westbound; exits combined eastbound |
| Jefferson | Kenner | 223.1– 224.0 | 359.0– 360.5 | 223 | LA 49 (Williams Boulevard) / 32nd Street Economy Airport Parking / Consolidated Auto Rental | Signed as exit 223A to Williams Boulevard /32nd Street and 223B to Airport; 32nd Street (westbound exit only), Airport (eastbound entrance and westbound exit) |
| Jefferson | Metairie | 224.5– 224.7 | 361.3– 361.6 | 224 | Power Boulevard | Eastbound entrance (from southbound Power Boulevard) and westbound exit |
| Jefferson | Metairie | 224.9– 225.5 | 361.9– 362.9 | 225 | Veterans Boulevard | |
| Jefferson | Metairie | 226.5– 227.2 | 364.5– 365.6 | 226 | Clearview Parkway (LA 3152 south) – Huey Long Bridge | Northern terminus of unsigned LA 3152; westbound exit to northbound Clearview Parkway also includes direct ramp onto Frontage Road |
| Jefferson | Metairie | 228.1– 229.0 | 367.1– 368.5 | 228 | Causeway Boulevard – MandevilleBonnabel Boulevard | To Mandeville via Lake Pontchartrain Causeway |
| Jefferson | Metairie | 229.5– 229.7 | 369.3– 369.7 | 229 | Bonnabel Boulevard | Eastbound access is part of exit 228 |
| Jefferson–Orleans parish line | Metairie–New Orleans line | 230.3– 231.1 | 370.6– 371.9 | 230 | I-610 east – Slidell | Western terminus of I-610 (exit 1B on I-610); no westbound exit |
| North end of Pontchartrain Expressway |||
| Orleans | New Orleans | 230.7– 231.1 | 371.3– 371.9 | 231B | Florida Boulevard / West End Boulevard | West End Boulevard is a one-way street; westbound exit only |
| Orleans | New Orleans | 230.7– 231.1 | 371.3– 371.9 | 231B | Pontchartrain Boulevard | One-way street; eastbound entrance only |
| Orleans | New Orleans | 231.3– 232.0 | 372.2– 373.4 | 231A | Metairie Road (LA 611-9 west) / City Park Avenue | Eastern terminus of unsigned LA 611-9 |
| Orleans | New Orleans | 231.9– 233.3 | 373.2– 375.5 | 232 | US 61 north (Airline Highway) US 61 south (Tulane Avenue) Carrollton Avenue | |
| Orleans | New Orleans | 233.8– 234.1 | 376.3– 376.7 | 234A | To US 90 (Claiborne Avenue) / US 90 Bus. / Pontchartrain Expressway south – Superdome, Westbank | Eastbound exit and westbound entrance; Pontchartrain Expressway south is unsigned I-910 |
| Orleans | New Orleans | 234.3 | 377.1 | 234B | Poydras Street – Superdome | Eastbound exit and westbound entrance |
| Orleans | New Orleans | 234.5– 234.8 | 377.4– 377.9 | 234C | US 90 west (Claiborne Avenue) US 90 Bus. west (Pontchartrain Expressway) – Westbank | Eastbound entrance and westbound exit; future southern terminus of I-49 |
| Orleans | New Orleans | 235.0 | 378.2 | 235B | Canal Street – Superdome | Eastbound entrance and westbound exit |
| Orleans | New Orleans | 235.4– 235.9 | 378.8– 379.6 | 235A | Orleans Avenue – Vieux Carré | |
| Orleans | New Orleans | 235.6 | 379.2 | 236A | Esplanade Avenue | Eastbound exit only |
| Orleans | New Orleans | 236.0– 236.2 | 379.8– 380.1 | 236B | LA 39 (North Claiborne Avenue) | Northern terminus of LA 39; eastbound exit and westbound entrance |
| Orleans | New Orleans | 236.4 | 380.4 | 236C | St. Bernard Avenue | Eastbound entrance and westbound exit |
| Orleans | New Orleans | 236.7– 237.2 | 380.9– 381.7 | 237 | Elysian Fields Avenue (LA 3021) | No eastbound entrance/exit connecting with southbound Elysian Fields Avenue or westbound entrance from northbound Elysian Fields Avenue |
| Orleans | New Orleans | 238.0– 238.3 | 383.0– 383.5 | 238B | I-610 west – N.O. Int'l Airport, Baton Rouge | Eastern terminus of I-610; eastbound entrance and westbound exit |
| Orleans | New Orleans | 238.0– 238.3 | 383.0– 383.5 | 238A | Franklin Avenue | Eastbound entrance and westbound exit |
| Orleans | New Orleans | 238.5– 239.2 | 383.8– 385.0 | 239 | Louisa Street / Almonaster Boulevard | Split into exits 239A (South/East) and 239B (North/West) eastbound; Almonaster Boulevard not signed westbound |
| Orleans | New Orleans | 238.9– 240.2 | 384.5– 386.6 | High Rise Bridge over Inner Harbor Navigation Canal (or Industrial Canal) | High Rise Bridge over Inner Harbor Navigation Canal (or Industrial Canal) | High Rise Bridge over Inner Harbor Navigation Canal (or Industrial Canal) |
| Orleans | New Orleans | 239.8– 240.0 | 385.9– 386.2 | 240A | Downman Road | Eastbound exit and westbound entrance |
| Orleans | New Orleans | 240.4– 240.8 | 386.9– 387.5 | 240B | US 90 (Chef Highway) | |
| Orleans | New Orleans | 241.5– 241.9 | 388.7– 389.3 | 241 | Morrison Road (LA 1253 west) | Eastern terminus of unsigned LA 1253 |
| Orleans | New Orleans | 242.6– 243.0 | 390.4– 391.1 | 242 | Crowder Boulevard | |
| Orleans | New Orleans | 243.6– 244.2 | 392.0– 393.0 | 244 | Read Boulevard | |
| Orleans | New Orleans | 244.8– 245.3 | 394.0– 394.8 | 245 | Bullard Avenue | |
| Orleans | New Orleans | 246.3– 247.0 | 396.4– 397.5 | 246 | I-510 / LA 47 south – Chalmette, NASA LA 47 north – Little Woods | Northern terminus of I-510 (exit 1A on I-510); signed as exit 246A (south) and 246B (north) |
| Orleans | New Orleans | 247.9– 248.5 | 399.0– 399.9 | 248 | Michoud Boulevard | |
| Orleans | New Orleans | 249.3– 249.8 | 401.2– 402.0 | 249 | Bayou Sauvage National Wildlife Refuge | Connecting road never constructed; would have provided access to the Bayou Sauvage National Wildlife Refuge |
| Orleans | New Orleans | 250.7– 251.3 | 403.5– 404.4 | 251 | Bayou Sauvage National Wildlife Refuge | Closed; serves gravel road open to authorized traffic only |
| Orleans | New Orleans | 254.2– 254.9 | 409.1– 410.2 | 254 | US 11 – North Shore, Irish Bayou | |
| Lake Pontchartrain | Lake Pontchartrain | 254.8– 260.4 | 410.1– 419.1 | Frank Davis "Naturally N'Awlins" Memorial Bridge (or I-10 Twin Span Bridge) | Frank Davis "Naturally N'Awlins" Memorial Bridge (or I-10 Twin Span Bridge) | Frank Davis "Naturally N'Awlins" Memorial Bridge (or I-10 Twin Span Bridge) |
| St. Tammany | ​ | 260.9– 261.7 | 419.9– 421.2 | 261 | Lakeshore, Oak Harbor | |
| St. Tammany | Slidell | 263.2– 263.7 | 423.6– 424.4 | 263 | LA 433 (Old Spanish Trail) | |
| St. Tammany | Slidell | 264.8– 265.3 | 426.2– 427.0 | 265 | US 190 Bus. (Fremaux Avenue) | |
| St. Tammany | Slidell | 265.9– 266.4 | 427.9– 428.7 | 266 | US 190 (Gause Boulevard) | |
| St. Tammany | Slidell | 267.1– 268.2 | 429.9– 431.6 | 267 | I-12 west / I-59 north – Hammond, Baton Rouge, Hattiesburg | Eastern terminus of I-12; exits 85A-C on I-12; southern terminus of I-59; exits 1B-C on I-59; signed as exits 267A (I-59) and 267B (I-12) |
| Pearl River | Pearl River | 273.1– 273.6 | 439.5– 440.3 | Louisiana–Mississippi line | Louisiana–Mississippi line | Louisiana–Mississippi line |
| Pearl River | Pearl River | 273.6 | 440.3 | | I-10 east – Bay St. Louis, Mobile | Continuation into Mississippi |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Closed/former Concurrency terminus Incomplete access Unopened |||||||

## Auxiliary routes

* I-110 is a spur northward through downtown Baton Rouge toward the northern part of the city. It was not in the original plans, but was added in the 1960s to replace the canceled I-410.
* I-210 is a bypass around the south side of Lake Charles. It was added in 1962.
* I-310 is a spur from I-10 west of New Orleans south to US 90 (future I-49). It was part of a longer I-410 from 1969 to 1977.
** A previous I-310 was added in 1964 and canceled in 1969. It would have run from I-10 east of downtown New Orleans south and southwest through the French Quarter to the Greater New Orleans Bridge.
* The first I-410 was a northern bypass of Baton Rouge along the Airline Highway (US 61/US 190) corridor. It was added in September 1955 and removed by the late 1960s.
** The second I-410 was defined in 1969 as a southern bypass of New Orleans, as a sort of replacement for the canceled I-310. The southern section of I-410 was canceled in 1977, and the west and east legs became I-310 and I-510, respectively.
* I-510 is a spur from I-10 in eastern New Orleans south to the Paris Road Bridge over the Gulf Intracoastal Waterway (Mississippi River-Gulf Outlet Canal). It was part of a longer I-410 from 1969 to 1977.
* I-610 is a bypass for through traffic north of downtown New Orleans. It was added in September 1955.
* I-910 is a piece of future I-49 from downtown New Orleans south and west to Marrero. The temporary designation was assigned by the Federal Highway Administration and American Association of State Highway Officials in 1999, but is not signed and has not been accepted by the Louisiana Department of Transportation and Development.