Turn signals should

1. be used every time you change lanes ✓
2. only be used when you are turning corners
3. be turned on a block ahead of your turn
4. only be used in heavy traffic

Answer: A. be used every time you change lanes

Turn signals should be used every time you change lanes.

Why this is the answer

The handbook describes turn signals as your main way of telling other road users what you plan to do. It says to signal when turning, changing lanes, pulling out or pulling over. Since changing lanes is included, the handbook expects a signal each time you do it. It also says the signal should be timely, giving others enough warning, but not so early that it confuses them about where you intend to go.

Why the other answers are wrong

• B. only be used when you are turning corners — Signals are not just for corners; the handbook also lists changing lanes, pulling out and pulling over as times to signal.
• C. be turned on a block ahead of your turn — The handbook does not set a fixed distance like one block ahead, and it warns against signaling too soon when other turns or driveways could confuse people.
• D. only be used in heavy traffic — The handbook presents signaling as something you always do when turning, changing lanes, pulling out or pulling over, not as something limited to heavy traffic.

Remember it

Before you move over, send the message with your signal.