Interstate 10
I-10 highlighted in red
Route information
Maintained by Louisiana DOTD
Length	274.42 mi[1] (441.64 km)
Existed	1957–present
History	Completed in 1978[2]
NHS	Entire route
Major junctions
West end	I-10 / US 90 at Texas state line
Major intersections	I-49 / US 167 in Lafayette I-12 in Baton Rouge I-55 near LaPlace US 90 / Future I-49 / I-910 in New Orleans US 11 in New Orleans I-12 / I-59 near Slidell
East end	I-10 at Mississippi state line
Location
Country	United States
State	Louisiana
Parishes	Calcasieu, Jefferson Davis, Acadia, Lafayette, St. Martin, Iberville, West Baton Rouge, East Baton Rouge, Ascension, St. James, St. John the Baptist, St. Charles, Jefferson, Orleans, St. Tammany
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Louisiana State Highway System Interstate US State Scenic
← LA 9 → LA 10
← LA 3026 3027 → LA 3028

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)^[1][3] 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.

On August 29, 2005, the I-10 Twin Span Bridge was severely damaged by Hurricane Katrina, rendering it unusable. The bridge was repaired, and later replaced with two higher elevation spans in 2009 and 2010.

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.^[4] 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.^[5] The 1947 plan shifted it to roughly the current alignment, including the long stretch of new corridor across the Atchafalaya Swamp.^[6] The corridor was assigned the I-10 designation in mid-1957.^[7]

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.^[8] 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.^[9]

Construction of the Interstate Highway System in Louisiana began in 1957.^[10] 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.

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.^{[50][unreliable source]} 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.^{[51][52][53][54]} 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.^[55] The old Twin Span will be demolished in the near future.^[56] In 2014, the Louisiana State Legislature officially named the Twin Span as the Frank Davis "Naturally N'Awlins" Memorial Bridge.^[57]

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.^{[citation needed]}

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).^{[58][unreliable source?]} In 2015, the additional lanes were extended in Metairie, from Clearview Parkway west to Veterans Boulevard.^{[citation needed]}

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.^{[citation needed]}

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.^[59]

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.^[60] Part of the project is constructing a diverging diamond interchange where both of the roads meet as well.^[61] 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.^[62] Construction began after the terminal was completed and was expected to be completed in November 2022.^[63] However, supply chain problems and the damage caused by Hurricane Ida in 2021 delayed the completion of the project to early-2023.^[64] 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.^[65][66] The I-10 westbound ramp to Loyola Drive was finally opened to traffic on September 29, 2023;^[67][68] the ramp from the airport to I-10 east opened two weeks later on October 13.^[66] The diverging diamond opening on October 30.^[69]

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.^[70] The movement to remove the expressway received backing from President Biden in April 2021.^[71] 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.^[72]

Exit list

Parish	Location	mi[3]	km	Exit	Destinations	Notes
Sabine River		0.00	0.00		I-10 west / US 90 west – Beaumont, Houston	Continuation into Orange, Texas
		0.00– 0.5	0.00– 0.80	Louisiana–Texas line
Calcasieu	​	0.6	0.97	1	Sabine River Turnaround	Westbound exit and eastbound entrance
	Toomey	4.0– 4.4	6.4– 7.1	4	US 90 east to LA 109 – Toomey, Starks	East end of US 90 concurrency
	Vinton	7.4– 7.8	11.9– 12.6	7	LA 3063 – Vinton	Southern terminus of LA 3063
		8.7– 9.3	14.0– 15.0	8	LA 108 – Vinton	Western terminus of LA 108
	Sulphur	20.3– 21.0	32.7– 33.8	20	LA 1256 to LA 27 – Sulphur, Cameron
		21.4– 21.9	34.4– 35.2	21	LA 27 – DeQuincy
		23.4– 23.9	37.7– 38.5	23	LA 108 – Industries, Sulphur
	​	24.9– 25.7	40.1– 41.4	25	I-210 east (Lake Charles By-Pass)	Western terminus of I-210 (exit 12 on I-210)
	​	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
	Westlake	27.7– 28.0	44.6– 45.1	27	LA 378 – Westlake	Southern terminus of LA 378
	Calcasieu River	28.0– 29.3	45.1– 47.2	Louisiana Memorial World War II Bridge
	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
		30.4– 30.7	48.9– 49.4	30B	Ryan Street – Downtown Area	Eastbound entrance and westbound exit
		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
		31.7– 32.0	51.0– 51.5	31B	US 90 east to LA 14 Shattuck Street	Eastbound signage; east end of US 90 concurrency Westbound signage
		32.4– 32.7	52.1– 52.6	32	Opelousas Street	No eastbound entrance
		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
	​	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)
	​	35.8– 36.4	57.6– 58.6	36	LA 397 – Creole, Cameron
	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
	Lacassine	47.9– 48.2	77.1– 77.6	48	LA 101 – Lacassine
	Welsh	54.3– 54.6	87.4– 87.9	54	LA 99 – Welsh
	Roanoke	59.1– 59.5	95.1– 95.8	59	LA 395 – Roanoke
	Jennings	63.6– 64.1	102.4– 103.2	64	LA 26 – Elton, 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)
	​	75.8– 76.2	122.0– 122.6	76	LA 91 – Iota, Estherwood
	Crowley	80.4– 81.0	129.4– 130.4	80	LA 13 – Eunice, Crowley
		81.8– 82.3	131.6– 132.4	82	LA 1111 – East Crowley
	Rayne	87.5– 88.0	140.8– 141.6	87	LA 35 / LA 98 – Church Point, Rayne
	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	99.7– 100.2	160.5– 161.3	100	LA 3184 (Ambassador Caffery Parkway)	Northern terminus of LA 3184
		101.6– 102.2	163.5– 164.5	101	LA 182 (North University Avenue)
		102.9– 103.5	165.6– 166.6	103	I-49 north / US 167 (Evangeline Thruway) to US 90 – Opelousas, Morgan City	Current southern terminus and exit 1 on I-49; signed as exits 103A (south) and 103B (north)
		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
	​	114.6– 115.2	184.4– 185.4	115	LA 347 – Cecilia, Henderson
	Atchafalaya Basin	117.3	188.8	West end of Louisiana Airborne Memorial Bridge
		121.4– 121.7	195.4– 195.9	121	LA 3177 – Butte LaRose	Northern terminus of LA 3177; to Atchafalaya Welcome Center
Iberville		127.3– 127.6	204.9– 205.4	127	LA 975 – Whiskey Bay	Southern terminus of LA 975
		135.1	217.4	East end of Louisiana Airborne Memorial Bridge
	Ramah	135.2– 135.5	217.6– 218.1	135	LA 3000 – Ramah, Maringouin	Southern terminus of LA 3000; to LA 76 (not signed)
	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
	Port Allen	153.2– 153.8	246.6– 247.5	153	LA 1 – Port Allen, Plaquemine
Mississippi River		153.4– 155.0	246.9– 249.4	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
		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
		155.9	250.9	155C	Louise Street	Eastbound entrance and westbound exit
		155.7	250.6	156A	Washington Street	Eastbound exit and westbound entrance
		156.2	251.4	156B	Dalrymple Drive – LSU	No eastbound entrance
		156.9– 157.1	252.5– 252.8	157A	Perkins Road	Eastbound exit and westbound entrance
		157.2– 157.7	253.0– 253.8	157B	Acadian Thruway (LA 427) – LSU
		157.9– 158.3	254.1– 254.8	158	College Drive
		159.3– 160.0	256.4– 257.5	159	I-12 east – Hammond	Western terminus of I-12 (exit 1A on I-12)
		160.4– 161.0	258.1– 259.1	160	LA 3064 (Essen Lane)
	​	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
	​	162.9– 163.8	262.2– 263.6	163	LA 3246 (Siegen Lane)
	​			164	Pecue Lane	Construction on a new interchange
	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
	Gonzales	177.2– 177.9	285.2– 286.3	177	LA 30 – Gonzales, St. Gabriel
		179.3– 180.0	288.6– 289.7	179	LA 44 – Gonzales, Burnside
	Sorrento	182.3– 183.0	293.4– 294.5	182	LA 22 – Sorrento, Donaldsonville
	​	186.9	300.8	187	US 61 south (Airline Highway) – Gramercy	Eastbound exit and westbound entrance
	​	187.5	301.8		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
		209.1– 209.8	336.5– 337.6	209	US 51 to I-55 north – Hammond, LaPlace	To I-55 signed eastbound only
	Bonnet Carré Spillway	209.2	336.7	West end of I-10 Bonnet Carré Spillway Bridge
		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		219.6– 220.8	353.4– 355.3	220	I-310 south – Boutte, Houma	Northern terminus and exits 1-1A on I-310
Jefferson		221.1	355.8	East end of I-10 Bonnet Carré Spillway Bridge
	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
		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)
	Metairie	224.5– 224.7	361.3– 361.6	224	Power Boulevard	Eastbound entrance (from southbound Power Boulevard) and westbound exit
		224.9– 225.5	361.9– 362.9	225	Veterans Boulevard
		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
		228.1– 229.0	367.1– 368.5	228	Causeway Boulevard – Mandeville Bonnabel Boulevard	To Mandeville via Lake Pontchartrain Causeway
		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
					Pontchartrain Boulevard	One-way street; eastbound entrance only
		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
		231.9– 233.3	373.2– 375.5	232	US 61 north (Airline Highway) US 61 south (Tulane Avenue) Carrollton Avenue
		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
		234.3	377.1	234B	Poydras Street – Superdome	Eastbound exit and westbound entrance
		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
		235.0	378.2	235B	Canal Street – Superdome	Eastbound entrance and westbound exit
		235.4– 235.9	378.8– 379.6	235A	Orleans Avenue – Vieux Carré
		235.6	379.2	236A	Esplanade Avenue	Eastbound exit only
		236.0– 236.2	379.8– 380.1	236B	LA 39 (North Claiborne Avenue)	Northern terminus of LA 39; eastbound exit and westbound entrance
		236.4	380.4	236C	St. Bernard Avenue	Eastbound entrance and westbound exit
		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
		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
				238A	Franklin Avenue	Eastbound entrance and westbound exit
		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
		238.9– 240.2	384.5– 386.6	High Rise Bridge over Inner Harbor Navigation Canal (or Industrial Canal)
		239.8– 240.0	385.9– 386.2	240A	Downman Road	Eastbound exit and westbound entrance
		240.4– 240.8	386.9– 387.5	240B	US 90 (Chef Highway)
		241.5– 241.9	388.7– 389.3	241	Morrison Road (LA 1253 west)	Eastern terminus of unsigned LA 1253
		242.6– 243.0	390.4– 391.1	242	Crowder Boulevard
		243.6– 244.2	392.0– 393.0	244	Read Boulevard
		244.8– 245.3	394.0– 394.8	245	Bullard Avenue
		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)
		247.9– 248.5	399.0– 399.9	248	Michoud Boulevard
		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
		250.7– 251.3	403.5– 404.4	251	Bayou Sauvage National Wildlife Refuge	Closed; serves gravel road open to authorized traffic only
		254.2– 254.9	409.1– 410.2	254	US 11 – North Shore, Irish Bayou
Lake Pontchartrain		254.8– 260.4	410.1– 419.1	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
	Slidell	263.2– 263.7	423.6– 424.4	263	LA 433 (Old Spanish Trail)
		264.8– 265.3	426.2– 427.0	265	US 190 Bus. (Fremaux Avenue)
		265.9– 266.4	427.9– 428.7	266	US 190 (Gause Boulevard)
		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		273.1– 273.6	439.5– 440.3	Louisiana–Mississippi line
		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.^[73]
• 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.^[74]
  • 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.^[74]
• 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^[73] 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.^[74]
• 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.^[74]
• I-610 is a bypass for through traffic north of downtown New Orleans. It was added in September 1955.^[73]
• 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.