As your speed increases, your field of vision:
- Increases.
- Decreases. ✓
- Neither increases nor decreases.
- Improves.
Answer: B. Decreases.
As your speed increases, your field of vision decreases.
Why this is the answer
The Texas handbook's speed section shows field of vision shrinking as speed rises. When you are stationary, it says your field of vision is 180 degrees or more. At higher speeds the handbook lists the field of vision reduced to about two-thirds, then about two-fifths, then about one-fifth. That is a narrowing view, so the correct choice is that it decreases. The passages do not discuss why beyond this, so stick to the pattern shown in the table.
Why the other answers are wrong
- A. Increases. — Increases is wrong because the handbook shows the field of vision getting smaller at higher speeds, not larger.
- C. Neither increases nor decreases. — Neither increases nor decreases is wrong because the handbook lists smaller field-of-vision fractions as speed rises.
- D. Improves. — Improves is wrong because the handbook describes a reduced field of vision at higher speeds, which is the opposite of improvement.
Remember it
Think of the handbook's fractions: the faster you go, the smaller the slice of the scene you see.