(a) This section applies only to:
(1) an authorized emergency vehicle using audible and visual signals that meet the requirements of Sections 547.305 and 547.702;
(2) a medical examiner vehicle, as defined by § 547.751, lawfully using a visual signal in accordance with that section;
(3) a vehicle operated by a justice of the peace for a purpose described by § 547.752 and lawfully using a visual signal in accordance with that section; and
(4) a police vehicle lawfully using only an audible or visual signal.
(a-1) On the immediate approach of a vehicle described by Subsection (a), an operator, unless otherwise directed by a police officer, shall:
(1) yield the right-of-way;
(2) immediately drive to a position parallel to and as close as possible to the right-hand edge or curb of the roadway clear of any intersection; and
(3) stop and remain standing until the authorized emergency vehicle has passed.

(b) This section does not exempt the operator of a vehicle described by Subsection (a) from the duty to drive with due regard for the safety of all persons using the highway.