Does Driving Resistance Increase or Decrease in Rainy Weather?
2 Answers
Driving resistance increases in rainy weather. Here are some rainy day driving tips: 1. Brake in advance: The braking distance on muddy or wet roads can be up to 3 times longer than on dry roads. Brakes are less effective in the rain, so slow down and brake earlier. 2. Do not reduce tire pressure: Some people lower their tire pressure during the rainy season, thinking it will increase the contact area between the tire and the ground for better traction. However, this has the opposite effect. Increasing the contact area reduces the pressure per unit area of the tire on the ground, weakening the force that pushes away the water film between the tire and the road, making the tire more prone to slipping. Therefore, lowering tire pressure does not improve traction—in fact, increasing tire pressure helps prevent slipping.
When driving in the rain, resistance usually decreases slightly, mainly because the rolling resistance of tires is reduced on wet and slippery roads. This isn't because of my driving skills, but rather because automotive principles tell us that rainwater forms a thin film on the road surface, acting somewhat like a lubricant, making tire rolling smoother. But this isn't a good thing! Reduced resistance means less friction, making the car more prone to skidding or losing control. I've driven countless cars and have had plenty of experience in rainy conditions. Every time, I notice that braking distances increase, steering response becomes sluggish, and I have to slow down earlier to maintain a safe distance. Additionally, heavy rain can lead to hydroplaning, which is extremely risky. My advice is to drive slower in the rain, ensure your tires are in good condition, avoid sudden acceleration or braking, and always prioritize safety.
