Thick fog forces you to slow well below the posted limit. What else should you do about spacing and speed?

• A.Keep the posted speed so others are not delayed
• B.Slow down for conditions and increase your following distance, using low-beam headlights
• C.Use high beams to see farther in fog
• D.Follow the taillights ahead as closely as possible

Why

Speed limits are set for ideal conditions. In fog you must reduce speed, increase the gap ahead, and use low beams, because high beams reflect back and make visibility worse.

Manual topic: Official Florida Driver License Handbook - Speed Limits & Following Distance · From the Florida Learner's Permit (Car) practice bank (FLC-030).

Practice the full Florida Learner's Permit (Car) test

More Speed Limits & Following Distance questions

• Unless a different speed is posted, what is the speed limit in a business or residential area in Florida?
• Unless posted otherwise, what is the speed limit on roads outside business and residential areas in Florida?
• What is the maximum speed allowed on a Florida limited-access highway (such as an interstate), when posted at the maximum?
• How fast may you drive in a Florida school zone when the reduced school-zone limit is in effect?
• On a multi-lane road an emergency vehicle is stopped on the shoulder with lights flashing, and you cannot safely move over a lane. What does Florida's Move Over law require?