You want to turn right at the next intersection. You should begin to use your turn signal:
- At least 50 feet before the turn.
- When you reach the intersection.
- At least 100 feet before the turn. ✓
- As soon as you see cars behind you.
Answer: C. At least 100 feet before the turn.
You should begin signaling at least 100 feet before the turn.
Why this is the answer
The handbook says the law requires you to signal a turn or lane change with your turn lights or hand signals at least 100 feet ahead. Signaling that early lets other highway users know what you intend to do. The manual also suggests signaling before you start braking or making the turn when possible, so people behind you and around you are not caught by surprise. Because the 100-foot distance is stated as a legal requirement, it is the minimum you should count on, not a target you can shorten when traffic looks light.
Why the other answers are wrong
- A. At least 50 feet before the turn. — Fifty feet is half the distance the manual says the law requires, so signaling then is too late.
- B. When you reach the intersection. — Waiting until you reach the intersection gives other drivers almost no warning and falls far short of the required 100 feet.
- D. As soon as you see cars behind you. — Other traffic behind you is not the trigger the manual names; the rule ties signaling to a fixed distance before the turn.
Remember it
Think of 100 feet as your signal starting line, and aim to signal before you touch the brake.