EVOC Night Driving & Low Visibility Operations Flashcards

What does the EVOC curriculum recommend as the primary strategy for managing fatigue during an extended night shift?

Answer: Communicate fatigue status to supervisors and request crew rotation

Proactively reporting fatigue allows supervisors to rotate drivers before impairment affects safe vehicle operation.

During rain at night, the 'halo' effect around streetlights and headlights is caused by:

Answer: Light refraction through water droplets on the windshield and in the air

Water droplets scatter and refract light, creating halos that reduce contrast and make it harder to distinguish objects and distances.

What is the recommended minimum following distance for an emergency vehicle traveling at highway speed at night?

Answer: At least 4 seconds, increased further in low-visibility conditions

Increased following distance at night provides extra reaction time since hazards appear later in the vehicle's headlight range.

When using a spotlight to illuminate an address at night, the driver should:

Answer: Have a crew member operate the spotlight while the driver keeps eyes on the road

Crew-member operation keeps the driver's hands on the wheel and eyes on the road, preventing a single-point-of-failure distraction.

At night, a pedestrian wearing dark clothing at a roadway incident is most visible to an approaching driver when:

Answer: Wearing reflective gear and positioned well off the travel lane

Reflective material returns headlight energy directly back to the driver's eyes, providing maximum contrast against the dark background.

Why should emergency drivers avoid using 'autopilot' mode during low-traffic nighttime highway runs?

Answer: Reduced stimulation leads to highway hypnosis and micro-sleep episodes

Highway hypnosis is a trance-like state triggered by monotonous low-stimulation driving, during which the driver may experience micro-sleep without awareness.