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
Highway markers for Interstate 10, Interstate 410, and Interstate 20 Business loop
Interstate Highways highlighted in red
System information
Maintained by TxDOT
Length	3,274.7 mi (5,270.1 km)
Formed	June 29, 1956 (1956-06-29)[1]
Highway names
Interstates	Interstate X (I-X) Interstate Highway X (IH X)
US Highways	U.S. Highway X (US X)
State	State 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
Highways in Texas Interstate US State Former Toll Loops Spurs FM/RM Park Rec

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

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-2	46.8[8]	75.3	US 83/Bus. US 83 in Peñitas	I-69E/US 77/US 83 in Harlingen	02013-05-302013[8]	current	Lowest numbered route in the system; Intersects I-69C in Pharr[9][10][11]
I-10	877.455[12]	1,412.127	I-10/US 85/US 180 at New Mexico state line in Anthony	I-10/US 90 at Louisiana state line in Orange	01959-10-011959[12]	current	Intersects 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-14	25.90	41.68	US 190/SH 9 in Copperas Cove	I-35/US 190 near Belton	02017-01-262017[18]	current	Known 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-20	634.723[21]	1,021.488	I-10 between Kent and Toyah	I-20 at Louisiana state line east of Waskom	01959-10-011959[21]	current	Intersects 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-27	124.182[25]	199.852	US 87/Loop 289 in Lubbock	I‑40/US 60/US 87/US 287 in Amarillo	01968-12-241968[25]	current	Extensions to Laredo and New Mexico signed into law on March 15, 2022[26]
I-30	223.404[27]	359.534	I-20 in Fort Worth	I-30/US 59/US 71 at Arkansas state line in Texarkana	01959-10-011959[27]	current	Intersects 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-35	407.195[29]	655.317	I-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]	current	Intersects 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-35E	96.657[34]	155.554	I-35 & I-35W in Hillsboro	I-35 & I-35W in Denton	01959-10-011959[34]	current	Eastern branch of I-35 through Dallas where it intersects I-20, I-30, and I-635[23][35]
I-35W	85.283[36]	137.250	I-35 & I-35E in Hillsboro	I-35 & I-35E in Denton	01959-10-011959[36]	current	Western branch of I-35 through Fort Worth where it intersects I-20, I-30, and I-820[22]
I-37	142.787[37]	229.793	US 181/SH 35 in Corpus Christi	I-35/US 281 in San Antonio	01959-10-011959[37]	current	Intersects 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-40	177.139[39]	285.078	I-40 at New Mexico state line in Glenrio	I-40 at Oklahoma state line east of Shamrock	01959-10-011959[39]	current	Intersects I-27 in Amarillo[40]
I-44	15.398[41]	24.781	US 277/US 281/US 287 in Wichita Falls	I-44/US 277/US 281 at Oklahoma state line north of Burkburnett	01982-06-291982[41]	current
I-45	284.913[42]	458.523	SH 87 in Galveston	I-30, I-345, US 67 in Dallas	01959-10-011959[42]	current	Intersects I-10, I-69, and I-610 in Houston;[17] and I-20 in Dallas[23]
I-49	2	3.2	I-49/US 59/US 71 at Arkansas state line north of Texarkana	I-49 at Arkansas state line north of Texarkana	proposed	—	Links two Arkansas I-49 segments[43]
I-69	74.9[44]	120.5	US 59/Spur 529 in Rosenberg	US 59 near Cleveland	02011-10-272011[44][45]	current	Intersects 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-69C	18[47]	29	I-2/US 83/US 281 in Pharr	US 281/FM 490 in Edinburg	02013-05-302013[47]	current	The future I-69C will follow US 281 ending at I-69W in George West[46]
I-69E	81[48]	130	Fed. 101/Fed. 180 at Veterans International Bridge in Brownsville US 77 in Kingsville	US 77 north of Raymondville I-37/US 77 in Corpus Christi	02013-05-302013[48]	current	Intersects 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-69W	1.4[49]	2.3	Fed. 85D at World Trade International Bridge in Laredo	I-35/US 59/US 83/Loop 20 in Laredo	02014-06-262014[49]	current	The 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

• 
  I-10 and I-35 run concurrently as an elevated freeway in Downtown San Antonio
• 
  I-20 in southern Fort Worth
• 
  I-37 and I-410 interchange on the southeast side of San Antonio
• 
  Interchange between I-37 and I-69E/US 77
• 
  I-10/US 90 and I-45 near Downtown Houston

Auxiliary Interstate Highways

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-110	0.891[50]	1.434	Fed. 45 at Bridge of the Americas in El Paso	I-10/US 54/US 180 in El Paso	01967-03-281967[50]	current	Partially along US 54[13]
I-169	1.5	2.4	Port of Brownsville	I-69E/US 77/US 83 in Olmito	02015-05-152015	current	Frontage 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-345	1.400[51]	2.253	I-30/I-45/US 67 in Dallas	US 75/Spur 366 in Dallas	01964-10-151964[51]	current	Unsigned
I-369	3.5[52]	5.6	US 59/SH 93/Loop 151 in Texarkana	I-30/US 59 in Texarkana	02013-05-302013[52]	current	Proposed extension along US 59 to I-69 in Tenaha; intersects I-20[24]
I-410	49.488[53]	79.643	Beltway around San Antonio		01959-10-011959[53]	current	Intersects I-10, I-35, and I-37[16][31]
I-610	37.972[54]	61.110	Beltway around Houston		01959-10-011959[54]	current	Intersects I-10, I-45, and I-69[17]
I-635	36.999[55]	59.544	I-20 in Balch Springs	SH 121 in Grapevine	01959-10-011959[55]	current	Partial Dallas beltway; intersects I-30, and I-35E[23][35]
I-820	35.173[56]	56.605	I-20 in Fort Worth	I-20/US 287 in Fort Worth	01959-10-011959[56]	current	Partial Fort Worth beltway; intersects I-30 and I-35W[22]

• 
  I-610 at US 290 in Houston
• 
  The High Five Interchange at I-635 and US 75 in Dallas

Business Interstate Highways

Number	Length (mi)[a]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-10 BL	2.747[57]	4.421	I-10 in Sierra Blanca	I-10 in Sierra Blanca	01990-06-211990[57]	current	Formerly Loop 416 signed as Bus. US 80[58]
I-10 BL	2.881[59]	4.637	I-10 in Van Horn	I-10 in Van Horn	01990-06-211990[59]	current	Formerly Loop 519 signed as Bus. US 80[60]
I-10 BL	2.000[61]	3.219	I-10/FM 2903 north of Balmorhea	I-10/SH 17 east of Balmorhea	01991-11-211991[61]	current	Formerly part of US 290 and FM 2903[61]
I-10 BL	1.398[62]	2.250	I-10/US 67 in Fort Stockton	I-10/US 67/US 385 in Fort Stockton	01991-01-211991[62]	current	Formerly part of US 290[62]
I-20 BL	14.042[63]	22.598	I-20 west of Pecos	I-20 east of Barstow	01991-08-281991[63]	current	Formerly part of US 80[63]
I-20 BL	8.223[64]	13.234	I-20 west of Monahans	I-20 in Monahans	01991-08-281991[64]	current	Formerly part of US 80[64]
I-20 BL	31.761[65]	51.114	I-20 in West Odessa	I-20 east of Midland	01991-08-281991[65]	current	Formerly part of US 80[65]
I-20 BL	4.687[66]	7.543	I-20 west of Stanton	I-20 east of Stanton	01995-03-301995[66]	current	Formerly Loop 214 preceded by US 80[67]
I-20 BL	5.609[68]	9.027	I-20 west of Big Spring	I-20 in Big Spring	01990-06-211990[68]	current	Formerly Loop 402 signed as Bus. US 80[69]
I-20 BL	1.069[70]	1.720	I-20/FM 670 west of Westbrook	I-20 in Westbrook	01990-06-211990[70]	current	Formerly Loop 333 preceded by US 80[71]
I-20 BL	5.926[72]	9.537	I-20 west of Colorado City	I-20 east of Colorado City	01990-06-211990[72]	current	Formerly Loop 377 signed as Bus. US 80[73]
I-20 BL	1.633[74]	2.628	I-20 west of Loraine	I-20 in Loraine	01990-06-211990[74]	current	Formerly Loop 316 preceded by US 80[75]
I-20 BS	1.644[76]	2.646	I-20 west of Roscoe	Bus. US 84/FM 608 in Roscoe	01990-06-211990[76]	current	Formerly Loop 237 preceded by US 80[77]
I-20 BL	6.448[78]	10.377	I-20/US 84 west of Sweetwater	I-20/US 84/SH 70 in Sweetwater	01990-06-211990[78]	current	Formerly Loop 432 signed as Bus. US 80[79]
I-20 BL	2.076[80]	3.341	I-20/US 84 west of Trent	I-20/US 84 east of Trent	01990-06-211990[80]	current	Formerly Loop 319 preceded by US 80[81]
I-20 BL	2.786[82]	4.484	I-20/US 84 west of Merkel	I-20/US 84/FM 1235 east of Merkel	01990-06-211990[82]	current	Formerly Loop 39 preceded by US 80[83]
I-20 BL	1.661[84]	2.673	I-20/US 84 in Tye	I-20/US 84 in Tye	01990-06-211990[84]	current	Formerly Loop 320 preceded by US 80[85]
I-20 BL	8.466[86]	13.625	I-20/US 84 in Tye	I-20 in Abilene	01990-06-211990[86]	current	Formerly Loop 355 signed as Bus. US 80[87]
I-20 BL	2.826[88]	4.548	I-20/FM 2047 west of Baird	I-20 east of Baird	01990-06-211990[88]	current	Formerly Loop 425 preceded by US 80[89]
I-27 BL	1.168[90]	1.880	I-27/US 87 in Hale Center	I-27/US 87 in Hale Center	02002-02-282002[90]	current
I-27 BL	9.282[91]	14.938	I-27/US 87 south of Plainview	I-27/US 87 in Plainview	01990-06-211990[91]	current	Formerly Loop 445 signed as Bus. US 87[92]
I-35 BL	3.400[93]	5.472	Fed. 85 at Gateway to the Americas International Bridge in Laredo	I-35/US 83 in Laredo	01991-03-261991[93]	current	Segment formerly Bus. US 83 and Loop 420 preceded by US 81/US 83[94][95]
I-35 BL	1.222[96]	1.967	I-35 south of Encinal	I-35/SH 44 north of Encinal	01990-06-211990[96]	current	Formerly Loop 532 signed as Bus. US 81[97]
I-35 BL	2.872[98]	4.622	I-35 south of Cotulla	I-35 in Cotulla	01991-03-261991[98]	current	Formerly part of US 81[98]
I-35 BL	4.147[99]	6.674	I-35 south of Dilley	I-35 north of Dilley	01991-03-261991[99]	current	Formerly part of US 81[99]
I-35 BL	5.449[100]	8.769	I-35/FM 1581 in Pearsall	I-35 north of Pearsall	01991-03-261991[100]	current	Segment formerly part of US 81[100]
I-35 BL	4.488[101]	7.223	I-35 in New Braunfels	I-35 in New Braunfels	01991-03-261991[101]	current	Formerly part of US 81[101]
I-35 BL	1.461[102]	2.351	I-35 in Kyle	I-35 in Kyle	01990-06-211990[102]	current	Formerly part of US 81[102]
I-35 BL	3.648[103]	5.871	I-35 in Round Rock	I-35/FM 3406 in Round Rock	01990-06-211990[103]	02013-02-282013[103]	Formerly Loop 384 signed as Bus. US 81;[104] segment now Spur 379[105]
I-35 BL	5.1[106]	8.2	I-35 in Georgetown	I-35 in Georgetown	01990-06-211990[106]	02006-05-252006[106]	Formerly Loop 418 signed as Bus. US 81;[107] segments now Spur 26 and Spur 158[106]
I-35 BL	2.288[108]	3.682	I-35W in Alvarado	I-35W in Alvarado	01990-10-251990[108]	current	Formerly Loop 392 signed as Bus. US 81[109]
I-35 BL	1.883[110]	3.030	I-35 in Sanger	I-35 in Sanger	01991-12-191991[110]	current	Formerly Spur 138; a portion preceded by part of US 77[111]
I-40 BL	0.779[112]	1.254	Historic US 66 at New Mexico state line in Glenrio	I-40 east of Glenrio	01990-06-211990[112]	current	Formerly Spur 504; segment preceded by part of US 66[113]
I-40 BL	2.369[114]	3.813	I-40 west of Adrian	I-40 east of Adrian	01990-06-211990[114]	current	Formerly Loop 550[115] preceded by part of US 66[116]
I-40 BL	3.395[117]	5.464	I-40 west of Vega	I-40 east of Vega	01990-06-211990[117]	current	Formerly Loop 551[118] preceded by part of US 66[119]
I-40 BL	14.125[120]	22.732	I-40 west of Amarillo	I-40 east of Amarillo	01990-10-251990[120]	current	Formerly Loop 552 preceded by part of US 66[121]
I-40 BL	3.533[122]	5.686	I-40 west of Groom	I-40 east of Groom	01990-06-211990[122]	current	Formerly Loop 554 preceded by part of US 66[123]
I-40 BL	3.796[124]	6.109	I-40 west of McLean	I-40 east of McLean	01990-06-211990[124]	current	Formerly Loop 555 preceded by part of US 66[125]
I-40 BL	2.770[126]	4.458	I-40 west of Shamrock	I-40 east of Shamrock	01993-03-241993[126]	current	Formerly Loop 556 preceded by part of US 66[127]
I-45 BL	6.367[128]	10.247	I-45 in Corsicana	I-45/US 287 north of Corsicana	01990-06-211990[128]	current	Formerly Loop 564 preceded by part of US 75[129]
I-45 BL	4.512[130]	7.261	I-45 in Ennis	I-45 in Ennis	01990-06-211990[130]	current	Formerly Loop 563 preceded by part of US 75[131]
I-45 BL	2.330[132]	3.750	I-45 in Palmer	I-45 north of Palmer	01990-06-211990[132]	current	Formerly Loop 562 preceded by part of US 75[133]
I-45 BL	3.367[134]	5.419	I-45 south of Ferris	I-45 north of Ferris	01990-06-211990[134]	current	Formerly 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

• U.S. Roads portal
• Texas portal

Notes

1. Official route lengths do not include segments that run concurrently with other highways of greater hierarchy