Tex. Transportation Code § 547.331: HAZARD LAMPS PERMITTED.

(a) A vehicle may be equipped with lamps to warn other vehicle operators of a vehicular traffic hazard that requires unusual care in approaching, overtaking, or passing.

(b) The lamps shall be:

(1) mounted at the same level and spaced as widely apart as practicable on the front and on the rear of the vehicle; and

(2) visible at a distance of at least 500 feet in normal sunlight.

(c) The lamps shall display simultaneously flashing lights that emit:

(1) a white or amber light, or a color between white and amber, if the lamp is mounted on the front of the vehicle; or

(2) a red or amber light, or a color between red and amber, if the lamp is mounted on the rear of the vehicle.

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.