Is It Safe to Drive on the Highway in Heavy Rain?

[RuthLynn]

Driving on the highway in heavy rain is not safe. It is advisable to promptly find a service area or exit the highway. Control Your Driving Speed: As is well known, highways have good road surfaces, and many people tend to exceed the speed limit on highways, which is detrimental to driving safety. The higher the speed, the greater the centrifugal braking distance, and the worse the vehicle's handling stability. Additionally, excessive speed shortens the driver's visibility distance and increases the likelihood of misjudgment. Therefore, controlling driving speed is the primary condition for ensuring safe operation on highways. Avoid Driving Too Slowly: Highways have a minimum speed limit of 60 km/h during normal driving. Driving too slowly, on one hand, can affect vehicles in the same lane and prevent the highway from realizing its intended advantages of speed and efficiency. On the other hand, it can easily cause traffic congestion or disrupt driving order with subsequent vehicles continuously overtaking. Avoid Following Too Closely: A safe following distance should vary based on driving speed, weather, and road conditions. The faster the speed, the greater the following distance should be, especially in snowy, rainy, foggy, or icy road conditions, where it should be significantly increased.

[LaKatherine]

That time I was driving on the highway during a heavy rainstorm, to be honest, it was quite scary. When it's pouring, the highway surface becomes slippery, tire grip significantly decreases, and hydroplaning can easily occur. Visibility may also drop suddenly to just a few dozen meters. I usually reduce my speed to below 80 km/h, turn on both front and rear fog lights along with hazard lights, and maintain a following distance at least twice the normal amount. The most dangerous part is when passing large trucks, as the water spray can completely block visibility, so I always accelerate in advance to pass quickly. Additionally, extra caution is needed for the risk of ice forming on bridges—heavy rain can actually be more dangerous than light rain. If the windshield wipers can't keep up with the water, don't push your luck; head to a service area immediately to take shelter from the rain.

[ElliotFitz]

Last week, my neighbor Lao Wang got stranded on the highway during a heavy rain while sending his child to college. He mentioned several things to avoid when driving on the highway in the rain: tires with treads below 3 mm are particularly prone to slipping, aging wiper blades that don’t clear properly should be replaced, and delayed defogging can obscure rearview mirrors. Experienced drivers know to check these before a heavy rain and recommend reducing tire pressure by 5% to increase contact area. Taking curves slowly is crucial, and any slight steering wheel vibration should alert you to hydroplaning. When he later went to repair his car, the mechanic said rear-wheel-drive vehicles are especially prone to losing control in heavy rain, while front-wheel-drive cars are relatively more stable, and four-wheel-drive performs best but still requires caution. The key to safe highway driving in heavy rain lies in preventive driving.

[LilaLee]

I remember my driving instructor repeatedly emphasized during the license test: the risk factor of driving on highways during heavy rain is more than three times higher than usual. Rainwater forms a film on asphalt roads, making tires feel like they're stepping on soap. Suddenly hitting the brakes can easily trigger the ABS system or even cause skidding. I recommend turning on the air conditioning compressor to defog, as fogged-up windshields are more dangerous than anything. Avoid using high beams for lighting, as they can reflect off raindrops and create a glare. When encountering waterlogged sections, hold the steering wheel steady and pass through at a constant speed, otherwise, sudden changes in resistance on one side of the tires could lead to loss of control. During prolonged heavy rain, also pay attention to waterproofing the engine's air intake; there have been cases where cars stalled in water and were completely totaled. Maintaining distance and controlling speed are always the top priorities.

[AmirLee]

Last month, I encountered heavy rain on the outskirts of a typhoon in the south, and the ESP light on my car kept flashing. Driving on the highway in such weather requires extreme caution—having shallow tire treads is practically asking for trouble. I noticed that when the rainfall is particularly heavy, if the central display shows an outside temperature below 4°C, you need to be wary of icy bridge surfaces, as some sections may have temporary speed limits. If the windows fog up, immediately turn on the external air circulation to defog them; using internal circulation only increases humidity. In heavy rain, braking distance increases by at least 40%, so maintain at least a 4-second gap from the car in front. Slow down before entering tunnels, as tunnel entrances often have large puddles. If the rain is so heavy that you can’t see the taillights of the car ahead, quickly find the nearest exit to get off the highway or pull into a service area.

[Levi]

Once, while helping a friend drive his SUV on a highway during a heavy rainstorm, I clearly felt the vehicle body floating. Rainwater can reduce brake disc efficiency by more than 20%, so it's essential to lightly tap the brakes in advance to warm them up. I noticed that setting the wiper frequency too fast can make the driver nervous; instead, a medium speed is more conducive to observation. During heavy rain, the middle lane is the safest, as the sides are prone to water accumulation. Nowadays, new cars come with a rain mode button—pressing it automatically adjusts throttle response and traction control. Remember to turn off the auto start-stop system; if the engine stalls in water and restarts, it could be ruined. The rearview mirror heating function must be turned on in advance, as fogged side windows can affect lane-changing judgment. Whether driving on a highway during a heavy rainstorm is safe depends half on the vehicle's condition and half on driving habits.