§ 70.23 FLASHING SIGNALS.
   Whenever flashing red or yellow signals are used, they shall require obedience by vehicular traffic as follows:
   (A)   Flashing red (stop signal). When a red lens is illuminated by rapid intermittent flashes, drivers of vehicles shall stop before entering the nearest crosswalk at an intersection or at a limit line when marked and the right to proceed shall be subject to the rules applicable after making a stop at a stop sign.
   (B)   Flashing yellow (caution signal). When a yellow lens is illuminated with rapid intermittent flashes, drivers of vehicles may proceed through the intersection or past such signal only with caution.
('68 Code, § 27-69) Penalty, see § 70.99
Statutory reference:
   Similar provisions, see Tex. Rev. Civ. Stat., Art. 6701d, § 35