Which statement about highway driving is true?

• A. You may not tailgate on highways
• B. Passing is not allowed on any highway
• C. You may exceed the speed limit to pass another vehicle
• D. You must reduce your speed under adverse conditions

Answer: (D)

When driving on a highway, adverse conditions like rain, fog, snow, or a slick surface require slower speeds to maintain control and give you more time to react. Slowing down helps you keep a safe following distance, reduces stopping distance in slippery conditions, and improves steering stability, all of which are crucial for staying out of crashes when visibility or traction is reduced. That’s why reducing your speed under adverse conditions is the true statement.

Other rules you’ll hear about facts like passing or tailgating aren’t universal guarantees: passing is allowed where it’s permitted and safe, and you shouldn’t exceed the speed limit to overtake. Tailgating unnecessarily shortens your reaction time and increases crash risk, especially on highways, so it’s unsafe even if not always illegal.