What is the speed limit during heavy rain?

[VanElijah]

When driving in rainy conditions, the speed should not exceed 60 kilometers per hour. Damage to the vehicle body: Driving in heavy rain can cause damage to the vehicle. After being soaked in the rain, water not only remains on the surface of the vehicle but also seeps into the gaps beneath the body. While driving in the rain, mud and dirt from the road can also splash into these gaps. When rainwater mixes with this dirt, it forms sticky residues that adhere to the gaps and hide in hard-to-reach areas. If not cleaned properly, this can lead to rust on the vehicle body. Engine stalling in the rain: If the car stalls while driving in the rain, do not attempt to restart it immediately. If the water level has submerged the exhaust pipe when the car stalls in water, restarting the engine can cause water to be sucked into the engine, leading to hydro-lock and severe engine damage. In such cases, the engine may need to be replaced entirely rather than repaired. Always remember: if the car stalls in water, do not attempt to restart it a second time.

[OEvelyn]

Last time I was driving on the highway during a heavy rainstorm, the wipers were practically flying off but still useless. Everything was just a white blur ahead, and even slowing down to 40 mph felt sketchy. The real issue wasn’t the speedometer reading—it was whether I could even see the taillights of the car in front of me. I could barely make out the outline of the vehicle ahead, so hitting the gas was out of the question. Road积水 (water accumulation) also made the tires lose grip—once I hit a puddle at 60 mph, and the steering wheel instantly went haywire, shaking like a sieve. My advice? Cut the speed limit in half during heavy rain. If visibility drops below 100 meters, just cruise at 30 mph with your hazards on, sticking to the far-right lane. Don’t trust those maniacs doing 80 mph—I’ve towed multiple cars that spun out in highway puddles.

[LeMolly]

Driving in heavy rain depends on vehicle condition and road conditions. When I drove an old sedan, it would start hydroplaning at speeds above 40 km/h in moderate rain. After switching to an SUV, it became more stable. But even with higher ground clearance vehicles, the most dangerous thing during heavy rain is water accumulation, especially those transverse water strips across bridges - hitting them at over 50 km/h will definitely cause loss of control. Experienced drivers will teach you to observe the taillights of the car ahead: if the water splashes from the taillights cover more than half the tire height, it means the water depth exceeds safe limits. Remember to turn off cruise control and coast through by releasing the accelerator in advance. If urban road water exceeds curb height, even at 30 km/h the wave can enter the exhaust pipe, causing breakdown in minutes.

[McKaleb]

Anyone who has driven freight knows how terrifying heavy rain can be. An empty heavy truck in a downpour feels like sailing a boat, and even when fully loaded, you have to cut your speed in half. The most critical issue is braking distance—on dry roads, stopping from 60 km/h takes 14 meters, but in a storm, it can exceed 40 meters. That’s why I always slow down in advance when I see dark clouds looming on the highway. Don’t take it lightly in smaller vehicles either—last year on the ring expressway, I saw a car hydroplane, spin 180 degrees, and crash into the guardrail, with airbags deploying. My advice: use fog lights in heavy rain, not high beams, as high beams only worsen visibility in water mist. Stay extra cautious on bridges and near tunnel entrances—these areas are most prone to water accumulation.