Answer:
all traffic, in either direction, must slow down, pull to the right of the road, and stop until the emergency vehicle passes
Explanation:
Provided they are in an emergency situation, ie; with their siren and / or lights on, vehicles intended for policing, fire brigade use, ambulances, and traffic surveillance and operation vehicles have priority in traffic and can move freely. This means that in a heavy traffic situation these vehicles have priority passage, so all traffic in any direction should slow down, pull to the right of the road and stop until the emergency vehicle passes.
