You should signal continuously while turning because it:

  1. Is illegal to turn off your signal before completing a turn.
  2. Lets other drivers know what your intentions are. ✓
  3. Is always unsafe to turn off a signal before completing a turn.

Answer: B. Lets other drivers know what your intentions are.

You should keep your signal on continuously while turning because it lets other drivers know what your intentions are.

Why this is the answer

The handbook treats signals, along with your horn and headlights, as tools for communicating with other drivers, pedestrians, and bicyclists, and it says to always signal when you turn. Signalling ahead of the turn and holding it through the turn keeps that message visible to people around you the whole time you are committed to the maneuver. The handbook also says to turn the signal off when you no longer need it, which means the signal stays on for the turn itself.

Why the other answers are wrong

Remember it

Think of your blinker as a message you keep sending until the turn is done, then shut it off so the message does not mislead anyone.

Official handbook: California Driver Handbook (DL 600), Section 5: An Introduction to Driving, p. 10

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.