List of Interstate Highways in Louisiana

{{routelist top|length_ref=}}

{{routelist row

|state=LA

|type=I

|route=10

|length_mi=274.42

|terminus_a=Texas state line at Orange, TX

|terminus_b=Mississippi state line east of Slidell

|established=1960

|established_ref=

|notes=Southern Louisiana's primary east–west route serving Lake Charles, Lafayette, Baton Rouge, New Orleans, and Slidell

}}

{{routelist row

|state=LA

|type=I

|route=12

|length_mi=85.59

|terminus_a=I-10 in Baton Rouge

|terminus_b=I-10/I-59 in Slidell

|established=1967

|established_ref={{cite news |title=State Highway Work Sets All-Time Mark |newspaper=The Times-Picayune |location=New Orleans |date=January 29, 1967 |at=sec. 8, p. 11}}

|notes=Northern bypass of New Orleans metropolitan area via Hammond

}}

{{routelist row

|state=LA

|type=I

|route=14

|length_mi=

|terminus_a=Texas state line near Leesville, LA (undecided)

|terminus_b=Mississippi state line near Natchez, MS (undecided)

|established=proposed

|established_ref=

|notes=Proposed extension roughly paralleling the LA 28 corridor

}}

{{routelist row

|state=LA

|type=I

|route=20

|length_mi=189.87

|terminus_a=Texas state line west of Greenwood

|terminus_b=Mississippi state line at Vicksburg, MS

|established=1960

|established_ref=

|notes=Northern Louisiana's primary east–west route serving Shreveport and Monroe

}}

{{routelist row

|state=LA

|type=I

|route=49

|length_mi=239.25

|terminus_a=I-10/US 167 in Lafayette

|terminus_b=Arkansas state line north of Ida

|established=1983

|established_ref={{cite news |title=I-49 Progressing in La.; 25 Miles Open, 55 to Go |newspaper=The Times-Picayune |location=New Orleans |date=January 15, 1984 |page=6}}

|notes=Louisiana's primary north–south route, connecting I-10 and I-20 via Alexandria; final gap in Shreveport is under construction and southern extension from Lafayette to New Orleans is planned

}}

{{routelist row

|state=LA

|type=I

|route=55

|length_mi=65.81

|terminus_a=I-10/US 51 in LaPlace

|terminus_b=Mississippi state line north of Kentwood

|established=1960

|established_ref={{cite news |title=Interstate Road Work Keeps Pace with Cars |newspaper=The Times-Picayune |location=New Orleans |date=August 4, 1960 |at=sec. 4, p. 11}}

|notes=North–south route in southeastern Louisiana via Hammond

}}

{{routelist row

|state=LA

|type=I

|route=59

|length_mi=11.48

|terminus_a=I-10/I-12 in Slidell

|terminus_b=Mississippi state line north of Pearl River

|established=1962

|established_ref={{cite news |title=La., Miss. Road Link Dedicated |newspaper=The Times-Picayune |location=New Orleans |date=August 3, 1962 |page=25}}

|notes=North–south route in southeastern Louisiana via Slidell

}}

{{routelist row

|state=LA

|type=I

|route=69

|length_mi=

|terminus_a=Texas state line southwest of Shreveport (undecided)

|terminus_b=Arkansas state line northeast of Haynesville (undecided)

|established=proposed

|established_ref=

|notes=Proposed extension roughly paralleling the US 79 corridor

}}

{{routelist bottom|keys=former,future}}

{{routelist top|length_ref=}}

{{routelist row

|state=LA

|type=I

|route=110

|length_mi=8.89

|terminus_a=I-10 in Baton Rouge

|terminus_b=US 61 in Baton Rouge

|established=1964

|established_ref={{AASHTO minutes |year=1970S |page=2 |access-date=May 26, 2017 |link=yes |v-link=yes}}

|notes=Baton Rouge spur; formerly designated as I-410

}}

{{routelist row

|state=LA

|type=I

|route=210

|length_mi=12.40

|terminus_a=I-10 west of Lake Charles

|terminus_b=I-10 east of Lake Charles

|established=1964

|established_ref={{cite news |title=Louisiana's 679.9 Miles of Interstate Highways Ahead of Schedule |newspaper=The Times-Picayune |location=New Orleans |date=November 27, 1964 |at=sec. 4, p. 1}}

|notes=Lake Charles downtown bypass

}}

{{routelist row

|state=LA

|type=I

|route=220

|length_mi=17.62

|terminus_a=I-20/LA 3132 in Shreveport

|terminus_b=I-20 in Bossier City

|established=1977

|established_ref={{cite news |last=Shuler |first=Marsha |title=Road Projects Give New Look to Area |newspaper=The Shreveport Times |location=Shreveport |date=December 29, 1977 |page=5A}}

|notes=Shreveport–Bossier City downtown bypass

}}

{{routelist row

|state=LA

|type=I

|route=310

|length_mi=11.25

|terminus_a=US 90/LA 3127 in Boutte

|terminus_b=I-10 west of Kenner

|established=1983

|established_ref={{cite news |title=Goodbye Ferry, Hello New Bridge, St. Charles Cheers |newspaper=The Times-Picayune |location=New Orleans |date=October 7, 1983 |page=1}}

|notes=Spur west of New Orleans

}}

{{routelist row

|state=LA

|type=I

|route=310

|length_mi=2.70

|terminus_a=US 90 Bus. in New Orleans

|terminus_b=I-10 in New Orleans

|established=1964

|established_ref={{cite web |last=Weingroff |first=Richard F. |url=https://www.fhwa.dot.gov/infrastructure/neworleans.cfm |title=The Battles of New Orleans—Vieux Carré Riverfront Expressway (I-310) |date=November 18, 2015 |work=Highway History |publisher=Federal Highway Administration |access-date=May 26, 2017}}

|decommissioned=1969

|decommissioned_ref={{AASHTO minutes |year=1969A |page=7 |access-date=May 26, 2017 |v-link=yes}}

|notes=Cancelled Vieux Carré Riverfront Expressway

}}

{{routelist row

|state=LA

|type=I

|route=410

|dab=Baton Rouge

|length_mi=1.90

|terminus_a=LA 67 in Baton Rouge

|terminus_b=I-10 in Baton Rouge

|established=1961

|established_ref={{cite map |publisher=Esso |title=Arkansas, Louisiana, Mississippi |date=1961 |author=General Drafting |edition=November 1961}}

|decommissioned=1964

|decommissioned_ref=

|notes=Unfinished Baton Rouge loop partially retained as I-110; planned as {{convert|13.60|mi|km|adj=on}} route with western terminus at I-10 near Port Allen

}}

{{routelist row

|state=LA

|type=I

|route=410

|dab=New Orleans

|length_mi=48.5

|terminus_a=I-10 west of New Orleans

|terminus_b=I-10 in Eastern New Orleans

|established=1969

|established_ref=

|decommissioned=1977

|decommissioned_ref={{AASHTO minutes |year=1977S |page=2 |access-date=May 26, 2017 |v-link=yes}}

|notes=Cancelled southern bypass of New Orleans known as the Dixie Freeway; partially built as current I-310 and I-510

}}

{{routelist row

|state=LA

|type=I

|route=420

|length_mi=10.20

|terminus_a=I-20 in West Monroe

|terminus_b=I-20 in Monroe

|established=1957

|established_ref={{cite news |last=Wagner |first=Robert |title=Interstate Highway System Construction Work Is Begun |newspaper=The Times-Picayune |location=New Orleans |date=January 26, 1958 |at=sec. 8, p. 12}}

|decommissioned=1964

|decommissioned_ref=

|notes=Cancelled two-lane bypass of Monroe

}}

{{routelist row

|state=LA

|type=I

|route=510

|length_mi=3.04

|terminus_a=LA 47 in New Orleans

|terminus_b=I-10/LA 47 in New Orleans

|established=1992

|established_ref={{cite news |last=Turni |first=Karen |title=I-510 Opening Links St. Bernard, I-10 |newspaper=The Times-Picayune |location=New Orleans |date=November 14, 1992 |page=B1}}

|notes=Spur in Eastern New Orleans

}}

{{routelist row

|state=LA

|type=I

|route=610

|length_mi=4.52

|beltway=I-10 in New Orleans

|established=1965

|established_ref={{cite news |title=Route to Ease Traffic Tieup |newspaper=The Times-Picayune |location=New Orleans |date=March 26, 1965 |at=sec. 2, p. 2}}

|notes=New Orleans downtown bypass

}}

{{routelist row

|state=LA

|type=I

|route=910

|length_mi=9.70

|terminus_a=US 90 Bus. in Marrero

|terminus_b=I-10/US 90 Bus. in New Orleans

|established=1999

|established_ref={{cite news |last=Sine |first=Richard |title=I-910 May Pave Path in N.O. |newspaper=The Times-Picayune |location=New Orleans |date=April 1, 2000 |page=A1}}

|notes=FHWA designation (not used by La DOTD) for freeway portion of US 90 Bus. and placeholder for future I-49 corridor

}}

{{routelist bottom|keys=former}}

• {{Portal-inline|United States}}
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{{reflist|30em}}

{{commons category|Interstate Highways in Louisiana}}

• [http://wwwsp.dotd.la.gov/Business/Pages/GIS_Maps.aspx Maps / GIS Data Homepage], Louisiana Department of Transportation and Development

{{Louisiana Highway System}}

{{DEFAULTSORT:List Of Interstate Highways In Louisiana}}

Interstate