Texas State Highway 75

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State Highway 75 marker

State Highway 75
Route information
Maintained by TxDOT
Length: 132.63 mi[1] (213.45 km)
Existed: 1987 – present
Major junctions
North end: I-45.svg Interstate 45 at Streetman

US 84.svg US 84 in Fairfield
US 79.svg U.S. Route 79

US 190.svg US 190
South end: I-45.svg I-45 at Conroe
Highway system
SH 74 SH 75A

State Highway 75 is a Texas state route remnant of the old U.S. Route 75. State Highway 75 retained the number as a state highway when Interstate 45 supplanted U.S. Route 75 south of Dallas except in Dallas, where old U.S. Route 75 is now State Highway 310, and through Ferris, Palmer, Ennis, and Corsicana, where the old highway is signed as Business Route I-45. This route was designated in 1987.


  • Southern terminus is in Conroe, where it merges into Interstate 45 at the southern side of Loop 336.[2]
  • Northern terminus is approximately three miles north of Streetman, in the southern section of Navarro County, where it becomes the east side frontage road for I-45.[3]

Previous routes[edit]

SH 75 was previously designated in 1926 to replace SH 13A from Amarillo east to the Oklahoma border. By 1927 it was running concurrently with the newly designated U.S. Highway 66, and was cancelled by 1938.

Related routes[edit]

North of Dallas, US 75 was rerouted onto Central Expressway, one of the first expressway projects in the United States, in the 1950s. Its original route from Richardson to Howe (south of Sherman) was redesignated as State Highway 5.

Counties and junctions[edit]

County Junction Notes
Montgomery I-45 (TX).svg I-45 – Conroe I-45 south exit 84, north exit 84B
Texas 105.svg SH 105 – Conroe
Walker Texas 150.svg SH 150 – New Waverly
Texas 19.svg SH 19 – Huntsville
Texas 30.svg SH 30 – Huntsville
I-45 (TX).svgUS 190.svg I-45/US 190 – Huntsville
Madison US 190.svgTexas 21.svg US 190/SH 21 – Madisonville
I-45 (TX).svg I-45 I-45 exit 146
Texas OSR.svg SH OSR
Leon Texas 7.svg SH 7 – Centerville
US 79.svg US 79 – Buffalo
Texas 164.svg SH 164 – Buffalo
Freestone Texas 179.svg SH 179 – Dew
US 84.svg US 84 – Fairfield
Navarro I-45 (TX).svg I-45 at Streetman I-45 exit 213


  1. ^ Texas Department of Transportation, [1]
  2. ^ Google (June 8, 2009). "Texas State Highway 75" (Map). Google Maps. Google. Retrieved June 8, 2009. 
  3. ^ Google (June 8, 2009). "Texas State Highway 75" (Map). Google Maps. Google. Retrieved June 8, 2009.