(a) In this section, "police escort" means facilitating the movement of a funeral, oversized or hazardous load, or other traffic disruption for public safety purposes by a peace officer described by Articles 2.12(1)-(4), (8), (12), (17)(B), and (22), Code of Criminal Procedure.
(b) Sections 546.001(2), (3), and (4) apply only when the operator is:
(1) responding to an emergency call;
(2) pursuing an actual or suspected violator of the law;
(3) responding to but not returning from a fire alarm;
(4) directing or diverting traffic for public safety purposes; or
(5) conducting a police escort.