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List of Interstate Highways in Texas

The Interstate Highways in Texas are all owned and maintained by the U.S. state of Texas.[2] The Texas Department of Transportation (TxDOT) is the agency responsible for the day-to-day maintenance and operations of the Interstate Highways in Texas. The Interstate Highway System in Texas covers 3,239.7 miles (5,213.8 km) and consists of twelve primary routes, seven auxiliary routes and Interstate 35 (I-35) which is split into two branches, I-35E and I-35W, that provide access to both Fort Worth and Dallas. The longest segment of Interstate Highway in Texas is I-10 at 878.6 miles (1,414.0 km); the shortest is I-110 at 0.9 miles (1.4 km).

Dwight D. Eisenhower National System of Interstate and Defense Highways

Interstate 10 marker

Interstate 410 marker

Interstate 20 Business marker

Highway markers for Interstate 10, Interstate 410, and Interstate 20 Business loop
Map
Interstate Highways highlighted in red
System information
Maintained by TxDOT
Length3,274.7 mi (5,270.1 km)
FormedJune 29, 1956 (1956-06-29)[1]
Highway names
InterstatesInterstate X (I-X)
Interstate Highway X (IH X)
US HighwaysU.S. Highway X (US X)
StateState Highway X (SH X)
Loops:Loop X
Spurs:Spur X
Recreational:Recreational Road X (RE X)
Farm or Ranch
to Market Roads:		Farm to Market Road X (FM X)
Ranch to Market Road X (RM X)
Park Roads:Park Road X (PR X)
System links

The construction of the Interstate Highway System in Texas began well before these routes were designated as Interstate Highways. A 50-mile (80 km) stretch of I-45 between Galveston and Houston was opened in 1951, eight years before it was designated I-45. It was also the first urban expressway in Texas. In 1962, 43 miles (69 km) of I-35 opened in Bexar County, the first section of Interstate Highway to open from county line to county line in a large metropolitan area.[3] Portions of I-10 west of San Antonio took much longer to complete due to the vast open spaces and lack of nearby labor. The majority of the construction of this section of I-10 occurred in the 1970s and 1980s and was complete by the early 1990s. The section east of San Antonio was completed 20 years earlier in 1972.[4] The opening of a 6-mile (10 km) section of I-27 in 1992 completed the Interstate Highway System in Texas.[5]

Planning is ongoing for a proposed extension of I-69 southward from its original terminus in Indiana through Texas to the United States–Mexico border.[6] If complete as planned, I-69 will extend about 650 miles (1,050 km) across Texas, from the Louisiana state line in the Texarkana–Shreveport area to South Texas.[7] The first 6.2-mile (10.0 km) portion was approved in 2011, with signage posted December 6, 2011.

Primary Interstate Highways

NumberLength (mi)Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-246.8[8]75.3US 83/Bus. US 83 in PeñitasI-69E/US 77/US 83 in Harlingen02013-05-302013[8]currentLowest numbered route in the system; Intersects I-69C in Pharr[9][10][11]
I-10877.455[12]1,412.127I-10/US 85/US 180 at New Mexico state line in AnthonyI-10/US 90 at Louisiana state line in Orange01959-10-011959[12]currentIntersects I-110 in El Paso;[13] I-20 between Kent and Balmorhea;[14][15] I-35, I-37, and I-410 in San Antonio;[16] and I-45, I-69, and I-610 in Houston[17]
I-1425.9041.68US 190/SH 9 in Copperas CoveI-35/US 190 near Belton02017-01-262017[18]currentKnown as the Fourteenth Amendment Highway;[19] to be extended west along US 190 to I-10 and I-20 and east to Louisiana[20]
I-20634.723[21]1,021.488I-10 between Kent and ToyahI-20 at Louisiana state line east of Waskom01959-10-011959[21]currentIntersects I-30, I-35W, and I-820 in Fort Worth;[22] I-35E, I-45, and I-635 in Dallas;[23] and future I-369 in Marshall[24]
I-27124.182[25]199.852US 87/Loop 289 in LubbockI‑40/US 60/US 87/US 287 in Amarillo01968-12-241968[25]currentExtensions to Laredo and New Mexico signed into law on March 15, 2022[26]
I-30223.404[27]359.534I-20 in Fort WorthI-30/US 59/US 71 at Arkansas state line in Texarkana01959-10-011959[27]currentIntersects I-35W and I-820 in Fort Worth;[22] I-35E, I-45, I-345, and I-635 in Dallas;[23] and I-369 in Texarkana[28]
I-35407.195[29]655.317I-35E & I-35W in Denton (Northern section)
Fed. 85 at Juárez–Lincoln International Bridge in Laredo (Southern section)		I-35/US 77 at Oklahoma state line north of Gainesville (Northern section)
I-35E & I-35W in Hillsboro (Southern section)		01959-10-011959[29]currentIntersects I-69W in Laredo[30] then I-10, I-37, and I-410 in San Antonio[16][31] before branching at Hillsboro into I-35E and I-35W[32] through Dallas and Fort Worth reuniting in Denton[33]
I-35E96.657[34]155.554I-35 & I-35W in HillsboroI-35 & I-35W in Denton01959-10-011959[34]currentEastern branch of I-35 through Dallas where it intersects I-20, I-30, and I-635[23][35]
I-35W85.283[36]137.250I-35 & I-35E in HillsboroI-35 & I-35E in Denton01959-10-011959[36]currentWestern branch of I-35 through Fort Worth where it intersects I-20, I-30, and I-820[22]
I-37142.787[37]229.793US 181/SH 35 in Corpus ChristiI-35/US 281 in San Antonio01959-10-011959[37]currentIntersects I-69E in Corpus Christi;[38] future I-69W east of George West; and both I-10 and I-410 in San Antonio[16][31]
I-40177.139[39]285.078I-40 at New Mexico state line in GlenrioI-40 at Oklahoma state line east of Shamrock01959-10-011959[39]currentIntersects I-27 in Amarillo[40]
I-4415.398[41]24.781US 277/US 281/US 287 in Wichita FallsI-44/US 277/US 281 at Oklahoma state line north of Burkburnett01982-06-291982[41]current
I-45284.913[42]458.523SH 87 in GalvestonI-30, I-345, US 67 in Dallas01959-10-011959[42]currentIntersects I-10, I-69, and I-610 in Houston;[17] and I-20 in Dallas[23]
I-49——I-49/US 59/US 71 at Arkansas state line north of TexarkanaI-49 at Arkansas state line north of Texarkanaproposed—Links two Arkansas I-49 segments; it will intersect future I-369 north of Texarkana[43]
I-6974.9[44]120.5US 59/Spur 529 in RosenbergUS 59 near Cleveland02011-10-272011[44][45]currentIntersects I-10, I-45, and I-610 in Houston; The future I-69 will extend from I-69E/I-69W merger south of Victoria along US 59 to Tenaha intersecting I-369 before following US 84 to I-69 at Louisiana state line east of Joaquin[46]
I-69C18[47]29I-2/US 83/US 281 in PharrUS 281/FM 490 in Edinburg02013-05-302013[47]currentThe future I-69C will follow US 281 ending at I-69W in George West[46]
I-69E61.1[48]98.3Fed. 101/Fed. 180 at Veterans International Bridge in Brownsville
US 77/FM 2826 in La Paloma-Lost Creek		US 77 north of Raymondville
I-37/US 77 in Corpus Christi		02013-05-302013[48]currentIntersects I-169 in Olmito and I-2 in Harlingen; The future I-69E will follow US 77 to I-69/I-69W south of Victoria[46]
I-69W1.4[49]2.3Fed. 85D at World Trade International Bridge in LaredoI-35/US 59/US 83/Loop 20 in Laredo02014-06-262014[49]currentThe future I-69W will follow US 59 to I-69/I-69E south of Victoria intersecting I-69C in George West and I-37 east of George West[46]
  •       Proposed and unbuilt

Auxiliary Interstate Highways

NumberLength (mi)Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-1100.891[50]1.434Fed. 45 at Bridge of the Americas in El PasoI-10/US 54/US 180 in El Paso01967-03-281967[50]currentPartially along US 54[13]
I-1691.52.4Port of BrownsvilleI-69E/US 77/US 83 in Olmito02015-05-152015currentFrontage roads opened and signed as SH 550 from I-69E/US 77/US 83 to FM 3248 in 2011 and from FM 3248 to the Port of Brownsville in 2013; main lanes opened and co-signed with SH 550 from I-69E/US 77/US 83 to Old Alice Road in 2015, main lanes currently under construction from Old Alice Road to the Port of Brownsville and should be completed by 2016, it will be a toll route once fully completed
I-3451.400[51]2.253I-30/I-45/US 67 in DallasUS 75/Spur 366 in Dallas01964-10-151964[51]currentUnsigned
I-3693.5[52]5.6US 59/SH 93/Loop 151 in TexarkanaI-30/US 59 in Texarkana02013-05-302013[52]currentProposed extension along US 59 to I-69 in Tenaha; intersects I-20 and future I-49[24]
I-41049.488[53]79.643Beltway around San Antonio01959-10-011959[53]currentIntersects I-10, I-35, and I-37[16][31]
I-61037.972[54]61.110Beltway around Houston01959-10-011959[54]currentIntersects I-10, I-45, and I-69[17]
I-63536.999[55]59.544I-20 in Balch SpringsSH 121 in Grapevine01959-10-011959[55]currentPartial Dallas beltway; intersects I-30, and I-35E[23][35]
I-82035.173[56]56.605I-20 in Fort WorthI-20/US 287 in Fort Worth01959-10-011959[56]currentPartial Fort Worth beltway; intersects I-30 and I-35W[22]

Business Interstate Highways

NumberLength (mi)[a]Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-10 BL2.747[57]4.421I-10 in Sierra BlancaI-10 in Sierra Blanca01990-06-211990[57]currentFormerly Loop 416 signed as Bus. US 80[58]
I-10 BL2.881[59]4.637I-10 in Van HornI-10 in Van Horn01990-06-211990[59]currentFormerly Loop 519 signed as Bus. US 80[60]
I-10 BL2.000[61]3.219I-10/FM 2903 north of BalmorheaI-10/SH 17 east of Balmorhea01991-11-211991[61]currentFormerly part of US 290 and FM 2903[61]
I-10 BL1.398[62]2.250I-10/US 67 in Fort StocktonI-10/US 67/US 385 in Fort Stockton01991-01-211991[62]currentFormerly part of US 290[62]
I-20 BL14.042[63]22.598I-20 west of PecosI-20 east of Barstow01991-08-281991[63]currentFormerly part of US 80[63]
I-20 BL8.223[64]13.234I-20 west of MonahansI-20 in Monahans01991-08-281991[64]currentFormerly part of US 80[64]
I-20 BL31.761[65]51.114I-20 in West OdessaI-20 east of Midland01991-08-281991[65]currentFormerly part of US 80[65]
I-20 BL4.687[66]7.543I-20 west of StantonI-20 east of Stanton01995-03-301995[66]currentFormerly Loop 214 preceded by US 80[67]
I-20 BL5.609[68]9.027I-20 west of Big SpringI-20 in Big Spring01990-06-211990[68]currentFormerly Loop 402 signed as Bus. US 80[69]
I-20 BL1.069[70]1.720I-20/FM 670 west of WestbrookI-20 in Westbrook01990-06-211990[70]currentFormerly Loop 333 preceded by US 80[71]
I-20 BL5.926[72]9.537I-20 west of Colorado CityI-20 east of Colorado City01990-06-211990[72]currentFormerly Loop 377 signed as Bus. US 80[73]
I-20 BL1.633[74]2.628I-20 west of LoraineI-20 in Loraine01990-06-211990[74]currentFormerly Loop 316 preceded by US 80[75]
I-20 BS1.644[76]2.646I-20 west of RoscoeBus. US 84/FM 608 in Roscoe01990-06-211990[76]currentFormerly Loop 237 preceded by US 80[77]
I-20 BL6.448[78]10.377I-20/US 84 west of SweetwaterI-20/US 84/SH 70 in Sweetwater01990-06-211990[78]currentFormerly Loop 432 signed as Bus. US 80[79]
I-20 BL2.076[80]3.341I-20/US 84 west of TrentI-20/US 84 east of Trent01990-06-211990[80]currentFormerly Loop 319 preceded by US 80[81]
I-20 BL2.786[82]4.484I-20/US 84 west of MerkelI-20/US 84/FM 1235 east of Merkel01990-06-211990[82]currentFormerly Loop 39 preceded by US 80[83]
I-20 BL1.661[84]2.673I-20/US 84 in TyeI-20/US 84 in Tye01990-06-211990[84]currentFormerly Loop 320 preceded by US 80[85]
I-20 BL8.466[86]13.625I-20/US 84 in TyeI-20 in Abilene01990-06-211990[86]currentFormerly Loop 355 signed as Bus. US 80[87]
I-20 BL2.826[88]4.548I-20/FM 2047 west of BairdI-20 east of Baird01990-06-211990[88]currentFormerly Loop 425 preceded by US 80[89]
I-27 BL1.168[90]1.880I-27/US 87 in Hale CenterI-27/US 87 in Hale Center02002-02-282002[90]current
I-27 BL9.282[91]14.938I-27/US 87 south of PlainviewI-27/US 87 in Plainview01990-06-211990[91]currentFormerly Loop 445 signed as Bus. US 87[92]
I-35 BL3.400[93]5.472Fed. 85 at Gateway to the Americas International Bridge in LaredoI-35/US 83 in Laredo01991-03-261991[93]currentSegment formerly Bus. US 83 and Loop 420 preceded by US 81/US 83[94][95]
I-35 BL1.222[96]1.967I-35 south of EncinalI-35/SH 44 north of Encinal01990-06-211990[96]currentFormerly Loop 532 signed as Bus. US 81[97]
I-35 BL2.872[98]4.622I-35 south of CotullaI-35 in Cotulla01991-03-261991[98]currentFormerly part of US 81[98]
I-35 BL4.147[99]6.674I-35 south of DilleyI-35 north of Dilley01991-03-261991[99]currentFormerly part of US 81[99]
I-35 BL5.449[100]8.769I-35/FM 1581 in PearsallI-35 north of Pearsall01991-03-261991[100]currentSegment formerly part of US 81[100]
I-35 BL4.488[101]7.223I-35 in New BraunfelsI-35 in New Braunfels01991-03-261991[101]currentFormerly part of US 81[101]
I-35 BL1.461[102]2.351I-35 in KyleI-35 in Kyle01990-06-211990[102]currentFormerly part of US 81[102]
I-35 BL3.648[103]5.871I-35 in Round RockI-35/FM 3406 in Round Rock01990-06-211990[103]02013-02-282013[103]Formerly Loop 384 signed as Bus. US 81;[104] segment now Spur 379[105]
I-35 BL5.1[106]8.2I-35 in GeorgetownI-35 in Georgetown01990-06-211990[106]02006-05-252006[106]Formerly Loop 418 signed as Bus. US 81;[107] segments now Spur 26 and Spur 158[106]
I-35 BL2.288[108]3.682I-35W in AlvaradoI-35W in Alvarado01990-10-251990[108]currentFormerly Loop 392 signed as Bus. US 81[109]
I-35 BL1.883[110]3.030I-35 in SangerI-35 in Sanger01991-12-191991[110]currentFormerly Spur 138; a portion preceded by part of US 77[111]
I-40 BL0.779[112]1.254Historic US 66 at New Mexico state line in GlenrioI-40 east of Glenrio01990-06-211990[112]currentFormerly Spur 504; segment preceded by part of US 66[113]
I-40 BL2.369[114]3.813I-40 west of AdrianI-40 east of Adrian01990-06-211990[114]currentFormerly Loop 550[115] preceded by part of US 66[116]
I-40 BL3.395[117]5.464I-40 west of VegaI-40 east of Vega01990-06-211990[117]currentFormerly Loop 551[118] preceded by part of US 66[119]
I-40 BL14.125[120]22.732I-40 west of AmarilloI-40 east of Amarillo01990-10-251990[120]currentFormerly Loop 552 preceded by part of US 66[121]
I-40 BL3.533[122]5.686I-40 west of GroomI-40 east of Groom01990-06-211990[122]currentFormerly Loop 554 preceded by part of US 66[123]
I-40 BL3.796[124]6.109I-40 west of McLeanI-40 east of McLean01990-06-211990[124]currentFormerly Loop 555 preceded by part of US 66[125]
I-40 BL2.770[126]4.458I-40 west of ShamrockI-40 east of Shamrock01993-03-241993[126]currentFormerly Loop 556 preceded by part of US 66[127]
I-45 BL6.367[128]10.247I-45 in CorsicanaI-45/US 287 north of Corsicana01990-06-211990[128]currentFormerly Loop 564 preceded by part of US 75[129]
I-45 BL4.512[130]7.261I-45 in EnnisI-45 in Ennis01990-06-211990[130]currentFormerly Loop 563 preceded by part of US 75[131]
I-45 BL2.330[132]3.750I-45 in PalmerI-45 north of Palmer01990-06-211990[132]currentFormerly Loop 562 preceded by part of US 75[133]
I-45 BL3.367[134]5.419I-45 south of FerrisI-45 north of Ferris01990-06-211990[134]currentFormerly Loop 560 preceded by part of US 75[135]
  •       Former
  • Bus. I-10-D in Van Horn
  • Bus. I-35-E in Pearsall

See also

Notes

References

External links

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