Interstate 40 in Texas

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Interstate 40 marker

Interstate 40
I-40 highlighted in red
Route information
Maintained by TxDOT
Length177.139 mi[1] (285.078 km)
Major junctions
West end I-40 at New Mexico state line
  US 385 in Vega
I-27 / US 60 / US 87 / US 287 in Amarillo
US 83 in Shamrock
East end I-40 at Oklahoma state line
CountiesDeaf Smith, Oldham, Potter, Carson, Gray, Donley, Wheeler
Highway system
SH 39SH 40
SH 65US 66.svgSH 66

In the U.S. state of Texas, Interstate 40 (abbreviated I-40) runs west–east through the panhandle in the northwest part of the state. The only large city it passes through is Amarillo, where it meets the north end of Interstate 27.


Before the U.S. Route system, this system of interconnected highway from New Mexico to Oklahoma was part of the Texas highway system and a portion of the Ozark Trails which closely paralleled the Chicago, Rock Island and Pacific Railway. When the United States Numbered Highway system was introduced in 1926, Route 66 across the Texas Panhandle was designated along existing roads in the Texas highway network. The entire route was paved by 1938. There have been various realignments, including one in 1959 to allow expansion of the Amarillo Air Force Base.

In 1956, the Interstate Highway Act designated US 66 through Texas as a section of highway eligible for limited access upgrades.

During the next 20 years, most of the highway was upgraded in place, to keep construction costs low. With the limited access of the Interstates, towns on the highway had to be bypassed. Most towns requested to remain as close to the new highway as possible to minimize tourism losses. Bypassed towns included Glenrio, Adrian, Vega, Conway, Groom, Jericho, Alanreed, McLean, and Shamrock. A new routing along the south end of downtown Amarillo was also built, connecting with the already-built expressway leading south from downtown toward Canyon. In 1985, the entire designation of U.S. Route 66 was removed as the entire route had been displaced by Interstate 40.

Route description[edit]

At grade intersection on Interstate 40 near mile marker 8 in far west Texas.

I-40 in Texas is one of a few Interstate Highways with at-grade intersections. The westernmost part of I-40 in Texas, near the New Mexico border, lacks the frontage roads typical to Texas freeways, and several driveways for ranches directly intersect the main lanes of I-40, in violation of Interstate standards. The entirety of Interstate 40 in Texas is located in the panhandle.

Interstate 40 enters Texas from New Mexico just north of Glenrio. The highway's first exit, exit 0, is for BL I-40-A, which serves the town of Glenrio. I-40 briefly runs through Deaf Smith County before entering Oldham County. The interstate gains frontage roads between exits 15 and 18 and turns from a northeast direction into a straight east direction. I-40 bypasses the town of Adrian before turning southeast. I-40 next bypasses the town of Vega, where it meets with US 385 at exit 36. The interstate briefly runs in a east direction through the town of Wildorado before turning back to the southeast. I-40 has a mostly rural route before becoming more suburban in Bushland, with housing developments becoming visible from the highway. The interstate passes by Cadillac Ranch before the Hope Road interchange and enters the city limits of Amarillo just west of Loop 335. I-40 expands from four lanes to six at Loop 335 and runs through a heavily developed area of the city. Near downtown, the highway serves as the northern terminus for Interstate 27 at a turbine interchange and begins an overlap with US 287.

I-40 runs through eastern Amarillo, passing by the American Quarter Horse Hall of Fame and The Big Texan Steak Ranch. Development along the route begins to lessen after S. Eastern Street as the highway passes near Rick Husband Amarillo International Airport. US 287 leaves I-40 at exit 78 as the interstate leaves the city limits of Amarillo. The highway runs primarily through rural farm land after leaving the city and enters the town of Groom, passing near a 19–story cross and a leaning water tower. East of Groom, I-40 has an overlap with SH 70 between exits 121 and 124. After the overlap with SH 70 ends, the terrain along the interstate begins to change from flat plains to a rolling canyon ridge with an observation point near Alanreed. I-40 returns to flatland again after the town of McLean and bypasses the town of Shamrock before entering Oklahoma near Texola.

Exit list[edit]

Deaf SmithGlenrio0.000.00 I-40 west – AlbuquerqueNew Mexico state line
0.480.770 BL I-40 – Glenrio
Oldham15.424.815Ivy Road
18.029.018 FM 2858 (Gruhlkey Road)
Adrian22 BL I-40 – Adrian
23 SH 214No westbound entrance; eastern terminus of BL-40
28 FM 3319 – Landergin
Vega35 BL I-40 east / FM 3319 – Vega
36 US 385 – Vega
37 BL I-40 west – Vega
42Everett Road
49 FM 809 – Wildorado
Potter54Adkisson Road
57 RM 2381 – Bushland
60Arnot Road
62AHope Road, Helium RoadAccess to Cadillac Ranch
Amarillo62B BL I-40 east (Amarillo Boulevard)Eastbound exit and westbound entrance
64 Loop 335 (Soncy Road) / Helium Road
65 Coulter StreetAccess to Northwest Texas Hospital and Baptist Saint Anthony's
66Bell Street, Avondale Street / Olsen Boulevard
67Western Street, Avondale Street / Olsen Boulevard
68AJulian Boulevard / Paramount Boulevard
68BGeorgia Street, Crockett Street
69ACrockett StreetWestbound exit and eastbound entrance
69BWashington Street – Amarillo College
70 I-27 south / US 60 / US 87 / US 287 north – Canyon, Lubbock, Dumas, PampaWest end of US 287 overlap; I-27 exit 123B; northern terminus of I-27
71Ross-Osage Street, Arthur Street
72ANelson Street, Quarter Horse DriveAccess to the American Quarter Horse Hall of Fame
72BGrand Street, Bolton Street
73Eastern Street, Bolton Street
74Whitaker Road
75 Loop 335 (Lakeside Drive)
76 Spur 468 (Airport Boulevard) – Amarillo International Airport
77 FM 1258 (Pullman Road)
78 US 287 south – Fort WorthEast end of US 287 overlap; eastbound exit and westbound entrance
80 Spur 228Amarillo College East Campus
81 FM 1912
Carson85Durrett RoadEastbound exit only
BL I-40 west (Amarillo Boulevard) / FM 2575No eastbound exit
87 FM 2373
89 FM 2161
96 SH 207 – Conway, Panhandle
98 SH 207 south – ClaudeWestbound exit and eastbound entrance
105 FM 2880
109 FM 294
Groom110 BL I-40 east – Groom
112 FM 295
113 FM 2300
Gray114 BL I-40 west – Groom
Donley121 SH 70 north – PampaWest end of SH 70 overlap
124 SH 70 south – ClarendonEast end of SH 70 overlap
128 FM 2477
Gray132Johnson Ranch Road
Alanreed135 Loop 271 to FM 291 – Alanreed
McLean141 BL I-40 east – McLeanEastbound exit and westbound entrance
142 SH 273 / FM 3143 – McLean
143 BL I-40 west – McLeanWestbound exit and eastbound entrance
146County Line Road
Wheeler148 FM 1443 (Kellerville Road)
152 FM 453 (Pakan Road)
157 FM 1547 / FM 2474 / FM 3075 – Lela
Shamrock161 BL I-40 east – ShamrockEastbound exit and westbound entrance
163 US 83 – Shamrock, Wheeler, Wellington
164 BL I-40 west – Shamrock
167 FM 2168 (Daberry Road) – Shamrock
169 FM 1802 (Carbon Black Road)
Benonine176 Spur 30 east – TexolaEastbound exit only
Frontage RoadWestbound entrance only
177.1285.0 I-40 east – Oklahoma CityOklahoma state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Business routes and old alignments[edit]

Business Loop 40.svg

I-40 has seven business routes in Texas, all of which are old alignments of US 66. A number of other old alignments of US 66 are also present; most are marked on guide signs on I-40.

Business Interstate Highway 40-A (formerly Spur 504) is a Business Spur that runs from I-40 at Glenrio, just east of the New Mexico state line, southwest to the border. In New Mexico, the road forks - the later paved alignment (c. 1952) has been cut by Interstate 40, and the earlier alignment west to San Jon is now a dirt road that had been paved when it was US 66 prior to 1952 but the paving was later removed by Quay County, NM commissioners due to high maintenance costs and low traffic volumes. The old US 66/I-40 Business Loop through Glenrio was bypassed in 1973 by I-40.[2]

Business Interstate Highway 40-B (formerly Loop 550) is a Business Loop through Adrian. The road was bypassed c. 1969 by I-40,[3] and carried US 66 until its 1985 decommissioning.[4]

Business Interstate Highway 40-C (formerly Loop 551) is a Business Loop through Vega. The road was bypassed c. 1973 by I-40,[3] and carried US 66 until its 1985 decommissioning.[5]

Business Interstate Highway 40-D (formerly Loop 552) is a long Business Loop through Amarillo. An older alignment - Loop 279 - carried Business U.S. Highway 66. East of Amarillo, Farm to Market Road 2575 is old US 66, rerouted to today's Business I-40 in 1958[6] by the construction of Amarillo International Airport. Present Business I-40 was bypassed in 1968 by I-40,[3] and carried US 66 until its 1985 decommissioning.[7]

Farm to Market Road 2161 and State Highway 207 carry old US 66 through Conway. The road was bypassed c. 1966 by I-40,[3] and carried US 66 until its 1985 decommissioning.[8]

Business Interstate Highway 40-F (formerly Loop 554) is a Business Loop through Groom. The road was bypassed c. 1980 by I-40,[3] and carried US 66 until its 1985 decommissioning.[9]

The short Loop 271, in addition to providing access to Farm to Market Road 291, is old US 66 through Alanreed. The road was bypassed in 1953 by US 66,[10] but the bypass was not upgraded to a freeway until c. 1982.[3]

Business Interstate Highway 40-H (formerly Loop 555) is a Business Loop through McLean. The road was bypassed c. 1984 by I-40,[3] and carried US 66 until its 1985 decommissioning.[11]

Business Interstate Highway 40-J (formerly Loop 556) is a Business Loop through Shamrock. The road was bypassed c. 1973 by I-40,[3] and carried US 66 until its 1985 decommissioning.[12]

Spur 30 is a short route from I-40 just west of the Oklahoma state line southeast to the border. In Oklahoma, the road is unnumbered though Texola, though it picks up Interstate 40 Business at exit 5 to run through Erick. The road was bypassed c. 1972 by I-40,[3] and carried US 66 until 1976, when it was moved onto I-40 in the area.[13]


In 2015, TxDot published the plans for the all new SL 335 Freeway Loop that encircles the city of Amarillo.[14] TxDot has planned multiple multi-level interchanges that intersect with Interstate 40. The first, on the East side of Amarillo, is a multi-level interchange that provided access to both directions of the IH-40 Expressway and SL 335. The second interchange with IH-40, however, is a full stack interchange. [15]. A new mainlane bridge that accommodates up to 6 lanes is also in the works for IH-40 near Helium Rd. providing easier access to the new freeway.[16] Although construction started in 2016, the project is not expected to be complete until 2022.[17]

See also[edit]


External links[edit]

Route map:

KML is from Wikidata

Interstate 40
Previous state:
New Mexico
Texas Next state: