HPT Speed and Following Distance 3

Question 1

A driver enters a school zone at 35 mph when the posted limit is 15 mph. In a hazard perception context, which risk is most immediately elevated?

Accepted Answer

Inability to stop in time for a child stepping off the curb

Answer

At 35 mph, stopping distance is far greater than the short distances typical in school zones, meaning a child stepping into the road could not be avoided.

Question 2

What effect does increasing speed have on a driver's peripheral vision?

Accepted Answer

It narrows peripheral vision, creating a tunnel-vision effect

Answer

As speed increases, drivers naturally focus further ahead, causing peripheral vision to narrow, which means roadside hazards are more easily missed.

Question 3

In a hazard perception test clip, a vehicle is following a cyclist at 40 mph with a 1-second gap. Why is this especially dangerous?

Accepted Answer

Cyclists can stop faster than cars and the driver has no time to react

Answer

Cyclists can brake sharply, and at 40 mph with only a 1-second gap the driver has nowhere near enough distance to stop before hitting the cyclist.

Question 4

What is the relationship between speed and the severity of a collision if a crash does occur?

Accepted Answer

Higher speeds result in exponentially greater impact forces and injury severity

Answer

Kinetic energy (and thus impact force) increases with the square of velocity, so even small increases in speed dramatically worsen crash outcomes.

Question 5

A driver on a highway notices the car ahead slowing due to congestion. The driver is traveling at 65 mph with a 2-second gap. What is the safest immediate action?

Accepted Answer

Gently begin braking and increase following distance before traffic fully stops

Answer

Proactively increasing the gap and beginning to reduce speed gives more buffer to stop safely, whereas maintaining speed or making sudden moves creates additional hazards.

HPT - Hazard Perception Test Practice Test

HPT - Hazard Perception Test Practice Test

HPT Speed and Following Distance 3