Interstate 40 in Oklahoma
|Maintained by ODOT|
|Length:||331 mi (533 km)|
|Existed:||1957 – present|
|West end:||I-40 at the Texas state line|
|Muskogee Tpk. near Webbers Falls|
|East end:||I-40 at the Arkansas state line|
Interstate 40 (I-40) is an Interstate Highway in Oklahoma that runs 331 miles (530 km) across the state from Texas to Arkansas. West of Oklahoma City, it parallels and replaces Old US-66, and east of Oklahoma City, it parallels US-62, US-266 and US-64.
Cities along the route include Erick, Sayre, Elk City, Clinton, Weatherford, El Reno, Oklahoma City, Shawnee, Okemah, Henryetta, Checotah and Sallisaw.
Route description 
Interstate 40 enters Oklahoma near Texola, in Beckham County. It crosses the North Fork of the Red River near Sayre and runs through the south side of Elk City. It then cuts across the northwest corner of Washita County before entering Custer County, where it passes through Clinton and Weatherford. After leaving Weatherford, I-40 then runs across the northern tip of Caddo County before it enters Canadian County.
I-40 runs through the south side of El Reno, entering the Oklahoma City metro. It then passes through Yukon before entering Oklahoma City proper. There, it has a junction with Interstate 44 (the Amarillo Junction). It then runs just south of downtown Oklahoma City on a new ten lane section of Interstate.  It next meets Interstate 35 in the Fort Smith Junction complex, forming a concurrency with it for about two miles (3 km). It then passes through Del City and Midwest City on a freeway known as the Tinker Diagonal, providing access to Tinker Air Force Base in Oklahoma City.
In far eastern Oklahoma City, I-40 meets Interstate 240 in a partial junction before passing through the north side of Shawnee. In Henryetta, I-40 serves as the northern terminus of the Indian Nation Turnpike. In McIntosh County, it crosses the northernmost arm of Lake Eufaula and meets the US-69 freeway south of Checotah.
Near Webbers Falls, I-40 is the southern terminus of the Muskogee Turnpike. It then crosses the Arkansas River before heading around southern Sallisaw. The interstate crosses into Arkansas north of Moffett.
|This section requires expansion. (May 2008)|
West of Oklahoma City, Interstate 40 parallels and replaces Old US-66. US-66 was decommissioned in Oklahoma in 1985.
The I-40 bridge over the Arkansas River/McClellan-Kerr Navigation System near Webbers Falls was struck by a barge on May 26, 2002, causing the bridge to collapse and resulting in the death of 14 people.
Oklahoma City Crosstown realignment 
The I-40 Oklahoma City Crosstown Expressway was built in 1966; however, this stretch of elevated highway is too narrow for existing traffic, and is in disrepair. In response, I-40 has been relocated a few blocks south of the exiting route, with the original elevated route torn down, and a landscaped boulevard proposed on the old right-of-way, similar to the I-30 reconstruction through downtown Fort Worth, Texas. The project was completed in February 2012.
Business routes and old alignments 
I-40 has eight business routes in Oklahoma, six of which are old alignments of US-66. A number of other old alignments of US-66 are also present west of Oklahoma City.
Erick I-40 Business Loop (formerly US-66) is a Business Loop that runs from I-40 two miles (3 km) west of Erick to the old alignment of US-66, through Erick, and back to I-40, four miles (6 km) east of Erick.
Sayre I-40 Business Loop (formerly US-66) is a Business Loop that begins two miles (3 km) south of Sayre at US-283, runs north into the city, and then leaves Sayre to the east, rejoining I-40 two miles (3 km) east of US-283.
Elk City I-40 Business Loop (formerly US-66) is a Business Loop that begins at Exit 32, seven miles (11 km) west of Elk City. It runs for ten miles (16 km) through Elk City, rejoining I-40 at Exit 41.
El Reno I-40 Business Loop (formerly US-66) is a Business Loop through El Reno. It exits I-40 at Exit 119, runs eight miles (13 km) through El Reno, and rejoins I-40 at Exit 125, the interchange with US-81.
Henryetta I-40 Business Loop (formerly US-62/US-75) is a Business Loop that leaves I-40 at Exit 237, runs four miles (6 km) through Henryetta, and rejoins I-40 at Exit 240, the interchange with US-75 and the Indian Nation Turnpike.
Exit list 
||This section contains a table that is missing mileposts for one or more junctions. Please help by|
|Texas–Oklahoma state line
||0.00||0.00||I-40 continues west into Texas|
|5||BL I-40 east (Honeyfarm Road) – Erick|
|Erick||7||SH-30 – Erick, Sweetwater|
|11||BL I-40 west – Erick|
|Sayre||20||BL I-40 east / US-283 (South 4th Street) – Mangum|
|23||SH-152 (Main Street) – Cordell|
|25.11||40.41||25||BL I-40 west (North 4th Street)|
|32||BL I-40 east / SH-34 south – Carter, Mangum, Elk City||Western terminus of SH-34 concurrency|
|Elk City||38||SH-6 (South Main Street) – Altus|
|40||East 7th Street|
|41||BL I-40 west / SH-34 north – Woodward, Elk City||Eastern terminus of SH-34 concurrency|
|50||Clinton Lake Road|
|Foss||53||SH-44 – Foss, Altus|
|Clinton||65||BL I-40 east (Gary Boulevard)||No eastbound entrance|
|65A||10th Street, Neptune Drive|
|66||US-183 (S. 4th Street) – Cordell|
|69.16||111.30||69||BL I-40 west – Clinton||Westbound exit and eastbound entrance|
|71||Custer City Road|
|Weatherford||80||SH-54 – Thomas, Mountain View|
|80A||BL I-40 east (W. Main Street) – Southwestern Oklahoma State University||Eastbound exit and westbound entrance|
|82||BL I-40 west (E. Main Street)|
||88||SH-58 – Hydro, Carnegie|
|101||US-281 / SH-8 – Hinton, Anadarko|
|108||US-281 Spur – Geary, Watonga|
|115||US-270 west – Calumet||Western terminus of US-270 concurrency|
|119||BL I-40 east – El Reno|
|El Reno||123||Country Club Road|
|125||BL I-40 west / US-81 – El Reno, Chickasha|
|132||Cimarron Road – C.E. Page Airport|
|Yukon||136||Garth Brooks Blvd.|
|137||Cornwell Drive, Czech Hall Road|
|138||SH-4 (Mustang Road) – Yukon, Mustang||Westbound exit via exit 139|
|139||Kilpatrick Turnpike east|
||Oklahoma City||142||Council Road|
|146||Portland Avenue||Eastbound exit and westbound entrance|
|147A||I-44 west / SH-3 east – Lawton|
|147B||I-44 east / SH-3 west – Tulsa|
|147C||May Avenue – Fair Park||Westbound exit and eastbound entrance|
|148A||Agnew Avenue, Villa Avenue|
|148B||Crosstown Boulevard||Projected ramp to future boulevard along old I-40 alignment|
|150A||Shields Boulevard||No Westbound exit|
|150B||Robinson Avenue||Westbound exit|
|151A||Crosstown Boulevard||Projected ramp to future boulevard along old I-40 alignment|
|151B||I-35 south / US-62 west (US-77 south) – Dallas||Western terminus of I-35/US-62 concurrency|
|151C||I-235 north (US-77 north) – Edmond, State Capitol, Oklahoma Health Center||Signed as exit 126 westbound|
|127||Eastern Avenue, M. L. King Avenue||Eastbound exit and westbound entrance|
|153||I-35 north / US-62 east to I-44 – Tulsa, Wichita||Eastern terminus of I-35/US-62 concurrency|
|Del City||154||Reno Avenue, Scott Street|
|155A||Sunnylane Road – Del City|
|155B||S.E. 15th Street – Del City, Midwest City|
|Midwest City||156A||Sooner Road|
|156B||Hudiburg Drive||No eastbound entrance|
|157A||S.E. 29th Street – Midwest City||Eastbound exit only|
|157B||Air Depot Boulevard - Tinker Gate|
|157C||Town Center Drive - Eaker Gate|
|159B||Douglas Boulevard – Lancer Gate, Liberator Gate, Marauder Gate|
|Oklahoma City||162||Anderson Road|
|165||I-240 west (SH-3) – Lawton, Dallas||Western terminus of SH-3 concurrency; westbound exit and eastbound entrance|
|172||Newalla Road – Harrah|
||176||SH-102 north (McLoud Road)||Western terminus of SH-102 concurrency|
|178||SH-102 south – Dale, Bethel Acres||Eastern terminus of SH-102 concurrency|
|181||US-177 / US-270 east / SH-3W east – Shawnee, Tecumseh||Eastern terminus of US-270 concurrency, SH-3 splits into SH-3E (which remains concurrent with I-40) and SH-3W (which exits)|
|Shawnee||185||SH-3E east – Shawnee||Eastern terminus of SH-3E concurrency|
|186||SH-18 – Shawnee, Meeker|
|192||SH-9A south – Earlsboro|
||200||US-377 / SH-99 – Prague, Seminole|
|212||SH-56 – Cromwell, Wewoka|
||217||SH-48 – Holdenville, Bristow|
|221||US-62 west / SH-27 – Okemah, Wetumka||Western terminus of US-62 concurrency|
|231||US-75 south – Wetumka, Weleetka||Western terminus of US-75 concurrency|
||Henryetta||237||BL I-40 east – Henryetta|
|240A||Indian Nation Turnpike – McAlester, Dallas|
|240B||US-62 east / US-75 north / BL I-40 west – Okmulgee||Eastern terminus of US-62/US-75 concurrency|
||247||Tiger Mountain Road|
|259||SH-150 (Lake Eufaula Road)|
|262||To US-266 / Lotawatah Road|
|264||US-69 – Eufaula, McAlester, Dallas|
US-69 Bus. – Checotah
|270||Texanna Road – Porum Landing|
||278||US-266 / SH-2 – Muskogee, Warner, Porum|
|286||Muskogee Turnpike west – Muskogee, Tulsa|
|287||SH-100 north – Webbers Falls, Gore|
||291||SH-10 north (Carlisle Road) – Gore|
|297||SH-82 – Vian, Tahlequah|
|303||Dwight Mission Road|
|Sallisaw||308||BL I-40 east / US-59 – Sallisaw, Poteau|
|311||BL I-40 west / US-64 – Sallisaw, Stilwell|
|321||SH-64B north – Muldrow|
|325||US-64 – Roland, Fort Smith|
|330||SH-64D south – Dora, Fort Smith||Eastbound exit and westbound entrance (Westbound exit and eastbound entrance is in Arkansas and is signed as Exit 1)|
|Oklahoma–Arkansas state line
||331.00||532.69||I-40 continues east into Arkansas|
See also 
- Froehlig, Adam. Scans from the "Yellow Book". Froggie's Place. URL accessed 20 September 2006.
- "OKC I-40 Crosstown". Okladot.state.ok.us. Retrieved 2011-09-19.
- ODOT Job Piece No. 17428(34), sheet 209
|Wikimedia Commons has media related to: Interstate 40 in Oklahoma|