As of September 2011, state law allows TxDOT to create higher speed limit on any state highway if found to be reasonable and safe through an engineering study. Each new 75 or 80 mph speed limit must be approved by the Texas Transportation Commission.

The tables below show approved 75 and 80 mph zones and are divided by the month in which the Commission approved the speed limit increase.

March 2012 - 80 mph

Highway Location Previous

Speed Miles Map SH 130 From IH 35 in Williamson County to US 183 in Travis County 75 45 SH 45 S From US 183 to IH 35 in Travis County 75 9.2

January 2012 - 75 mph

Highway Location Previous

Speed Miles Map IH 10 From the New Mexico State Line to Mile Marker 8 in El Paso 70 9 IH 10 From Mile Marker 36 South of El Paso to the El Paso – Hudspeth County Line 70 26 IH 10 From the Kerr – Gillespie County Line to Loop 1604 in San Antonio 70 63 IH 10 From Mile Marker 582 in San Antonio to the Austin – Waller County Line 70 145 IH 10 From the Chambers – Jefferson County Line to US 69 in Beaumont 70 19 IH 10 From the Jefferson – Orange County Line to the Louisiana State Line 70 25 IH 20 From the Ward – Crane County Line to the Palo Pinto – Parker County Line 70 310 IH 20 From the Kaufman - Van Zandt County Line to the Louisiana State Line 70 122 IH 27 From Mile Marker 8 North of Lubbock to Mile Marker 117 in Amarillo 70 109 IH 30 From the Rockwall – Hunt County Line to FM 989 in Texarkana 70 139 IH 35 From Mile Marker 7 in Laredo to the Webb – La Salle County Line 70 31 IH 35 From the Frio – Medina County Line to SS 442 in San Antonio 70 31 IH 35W From the IH 35 Split North of Hillsboro to the Hill – Johnson County Line 70 14 IH 35E From the IH 35 Split North of Hillsboro to the Hill – Ellis County Line 70 8 IH 35 From the Denton – Cooke County Line to the Oklahoma State Line 70 22 IH 37 From Mile Marker 4 in Corpus Christi to Mile Marker 134 in San Antonio 70 130 IH 40 From the New Mexico State Line to Mile Marker 64 in Amarillo 70 65 IH 40 From Mile Marker 75 in Amarillo to the Oklahoma State Line 70 101 IH 44 From Mile Marker 4 in Wichita Falls to the Oklahoma State Line 70 11 IH 45 From the Montgomery – Walker County Line to the Navarro – Ellis County Line 70 143

October 2011 - 75 mph

Highway Location Previous

Speed Miles Map SH 45 N From US 183 in Travis County to SH 130 in Williamson County 70 13.5

September 2011 - 75 mph

Highway Location Previous

Speed Miles Map IH 35 From Georgetown in Williamson County to Salado in Bell County 70 and 65 21.7 SH 130 From IH 35 in Williamson County to US 183 in Travis County 70 45 SH 45 S From US 183 to IH 35 in Travis County 70 9.2 US 281 From the Lampasas-Burnet County Line to 8 miles north of the Burnet City Limit 70 11.9

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