Rain is most dangerous for driving during which period?

• A. During the first 10-15 minutes after rain begins
• B. The middle of the storm
• C. After rain stops
• D. When roads are dry

Answer: (A)

The danger is greatest in the first moments after rain begins. When rain starts, a thin film of oil, grime, and rubber sits on the pavement. Water on top of that film makes the surface incredibly slick, so tires have less grip, braking distances grow, and it’s easy to skid or slide if you turn or stop suddenly. As the rain continues, that slick film is gradually washed away and traction improves somewhat, though it’s still reduced compared with dry conditions. So, during the initial 10–15 minutes, conditions are typically at their slickest, making this period the most dangerous for driving. Slow down, increase following distance, and avoid abrupt steering or heavy braking during that time.