An emergency vehicle is any vehicle that is designated and authorized to respond to an emergency. These vehicles are usually operated by designated agencies, often part of the government, but also run by charities, non-governmental organizations, and some commercial companies. Examples of emergency vehicles are police cars, ambulances, and fire trucks. Often emergency vehicles are permitted by law to break conventional road rules in order to reach their destinations in the fastest possible time, such as (but not limited to) driving through an intersection when the traffic light is red or exceeding the speed limit.
The Texas law states that on the immediate approach of an authorized emergency vehicle using audible and visual signals, a vehicle operator, unless otherwise directed by a police officer, shall:
Once an emergency vehicle passes, you should turn off the vehicle’s hazard flashers, turn on left signal, and begin to merge back onto the roadway when it is safe.
Information provided by a Texas Defensive Driving School - Comedydriving.com.