Name three factors that increase stopping distance for an emergency vehicle.

• A. Speed and driver experience only.
• B. Weather (wind) and time of day.
• C. Speed, road surface condition (wet/icy), tire condition and tread depth, vehicle weight/load, and weather (wind).
• D. Tire color and wheel size.

Answer: (C)

Stopping distance is determined by how far you travel while reacting and how far you must travel while braking, and it grows with speed and with factors that affect tire grip and braking effectiveness. Going faster increases both the reaction distance and the braking distance, so stopping takes longer. The road surface matters because wet or icy pavement lowers friction, making tires slip sooner. Tire condition and tread depth are crucial because worn tires don’t grip as well, increasing stopping distance. Vehicle weight or load adds inertia; a heavier vehicle is harder to slow and stops over a longer distance. Wind affects braking by adding drag and potentially influencing stability, which can change how quickly you can decelerate safely. These factors together explain why the most complete option lists speed, road surface condition, tire condition and tread depth, vehicle weight/load, and wind. The other options miss important physical factors or include irrelevant ones like tire color or time of day.