Final answer:
When encountering a stationary emergency vehicle with activated lights, you must slow down and move over to provide space, ensure safety, and comply with legal requirements.
Step-by-step explanation:
When approaching a stationary emergency vehicle displaying lighted red or red and blue lights, the proper action to take is to slow down and move over to give the emergency vehicle as much space as possible. This is both for your safety and the safety of the emergency responders. Legally, many places require drivers to move over a lane if possible, or if not, to greatly reduce their speed when passing an emergency vehicle with its lights activated.
This ensures that emergency responders have the room they need to safely conduct their duties. It is imperative that one does not stop moving and become stationary unless directly instructed by law enforcement, run toward the ambulance, or run alongside the ambulance as these actions could jeopardize the safety of all parties involved.