Your first response to reduced visibility should be:
- Turning on your headlights.
- Reducing your speed. ✓
- Turning on your windshield wipers.
- Looking for road edge markings to guide you.
Answer: B. Reducing your speed.
You should reduce your speed as your first response to reduced visibility.
Why this is the answer
The handbook says posted speed limits apply to favorable conditions and that you must adjust your speed to weather, roadway, and traffic. It gives a storm as an example and says to drive slower than the posted limit then. The safest speed is the one that lets you keep complete control and avoid collisions. When visibility drops, that same reasoning points to slowing down first, rather than assuming the posted limit still fits.
Why the other answers are wrong
- A. Turning on your headlights. — The passages mention operable headlights when visibility is reduced only as a vehicle-test requirement, not as the first response to reduced visibility.
- C. Turning on your windshield wipers. — Windshield wipers appear only as a vehicle inspection item, and the passages do not say turning them on is the first response to reduced visibility.
- D. Looking for road edge markings to guide you. — The passages do not mention using road edge markings to guide you in reduced visibility.
Remember it
Think of the posted limit as a fair-weather ceiling; when you cannot see as well, ease off the gas.
Official handbook: Florida Driver License Handbook (FLHSMV), 7. Driving Safety – Turning, p. 68