Before passing another vehicle, you should signal:
- Just before changing lanes.
- At any time.
- After changing lanes.
- Early enough for others to know your plans. ✓
Answer: D. Early enough for others to know your plans.
Signal early enough for others to know your plans before you pass.
Why this is the answer
The handbook says you must turn on your signal before moving into the left lane, so other drivers know you are about to change lanes to pass. The point of the signal is to warn people around you of what you are about to do, which only works if they see it before you move. That is why the answer focuses on timing the signal early enough for others to read your plans, rather than on signaling at some random moment or after the fact.
Why the other answers are wrong
- A. Just before changing lanes. — Signaling only at the last moment gives the drivers around you little chance to notice and react, which defeats the purpose of announcing the lane change.
- B. At any time. — A signal given at any time, including after you have already moved, does not tell anyone what you are about to do.
- C. After changing lanes. — Signaling after you change lanes is too late, since the warning is supposed to come before you move into the left lane.
Remember it
Signal first, then move: the signal is your message to other drivers about what comes next.
Official handbook: Florida Driver License Handbook (FLHSMV), 7. Driving Safety – Passing, p. 67