Blind spots are:
- Spots in your vision when you become fatigued.
- Areas of the road that cannot be seen in a vehicle's mirrors. ✓
- Traffic control devices.
Answer: B. Areas of the road that cannot be seen in a vehicle's mirrors.
Blind spots are areas of the road that cannot be seen in a vehicle's mirrors.
Why this is the answer
The manual explains that even correctly adjusted mirrors leave blind spots behind both sides of your vehicle, and a vehicle sitting in one of those spots may not show up in the mirror at all. That is why you are told to glance over your shoulder before changing lanes or passing. The blind spot is about what the mirrors fail to show you, not about how tired you feel or about signs and signals on the road.
Why the other answers are wrong
- A. Spots in your vision when you become fatigued. — Fatigue affects your alertness, but the manual describes blind spots as a gap in what your mirrors can show, not a mental state.
- C. Traffic control devices. — Traffic control devices like signs and signals are things you look for on the road, not unseen areas around your vehicle.
Remember it
Think of a blind spot as a mirror blind spot: if the mirror misses it, turn your head and check it.