What should you know about traction?

• A. Traction is always abundant
• B. Traction is not affected by weather
• C. There is only ever a limited amount available
• D. Traction changes randomly

Answer: (C)

Traction is the grip your tires have on the road to accelerate, brake, and steer. That grip is finite—you can’t use more than the friction available at the tire-road contact. The amount of traction you have depends on road surface, weather, tire tread and condition, and load, and it can change as conditions change. Because you only have a limited amount of grip, you must manage it when you accelerate, brake, and turn; pushing beyond that limit leads to skidding or loss of control.

That’s why the best answer says there is only ever a limited amount available. The other statements aren’t accurate: traction isn’t always abundant, it isn’t unaffected by weather, and it doesn’t change randomly—the grip changes with conditions and driving inputs.