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What is the maximum speed limit when driving downhill?

4 Answers
DeCorbin
07/29/25 2:47pm
When driving downhill on steep slopes, turning, or making U-turns, the maximum speed should not exceed 30 kilometers per hour. Here are more relevant details: 1. Regarding uphill driving: When parking on an uphill slope, apply the brakes slightly later than on flat roads. This is because the vehicle's speed naturally decreases due to slope resistance when driving uphill, resulting in a shorter braking distance compared to flat roads. Therefore, braking should be slightly delayed compared to flat road conditions. 2. Normal driving: During regular driving, the service brake (foot brake) is typically used to slow down or stop while moving forward. Once the vehicle comes to a complete stop, the parking brake (handbrake) should be applied to prevent the vehicle from rolling forward or backward.
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StLeo
08/13/25 7:17am
I've been driving for decades, and you absolutely must not exceed the speed limit when going downhill—it's no joke. Mountain roads often have speed limit signs, usually 30 or 40 kilometers per hour is the safest. If you go too fast, gravity will pull the car to accelerate, and the brake pads can overheat and fail easily. Once out of control, the consequences are unthinkable. Remember to use lower gears to slow down, such as second or third gear for manual transmissions, to reduce the burden on the brakes—don’t rely on slamming them. This is especially important on rainy days or steep slopes; keep a distance of at least twice that of the car in front of you—safety first. A veteran driver’s advice is to check the navigation in advance, familiarize yourself with the road conditions, and never be careless. Controlling your speed not only avoids accidents but also saves fuel—it’s economical and practical.
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DelRiley
10/11/25 4:34am
Downhill speed should be adjusted according to road conditions and signs—don't assume you can rush. Highways may have an 80 km/h limit, but mountain roads often require speeds below 40. I make it a habit to check speed limit signs before driving to ensure I don't exceed them. Higher speeds increase braking pressure, and overheating can lead to brake fade, raising the risk of rear-end collisions. Use engine braking techniques, such as switching an automatic transmission to manual mode or using the S gear, to descend slowly. Following the rules isn’t just about avoiding tickets—it’s about protecting yourself. Regularly inspect tires and brake systems to ensure reliability. My personal advice: don’t prioritize speed; arriving safely is far more important than saving time.
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CharlieRose
10/11/25 4:36am
When going downhill, it's important to slow down. I usually keep my speed below 40 km/h, especially when carrying family members. Going too fast can easily lead to loss of control, with the center of gravity shifting forward and potentially causing a rollover. Safe driving is the priority—adjust your speed according to road conditions and avoid rushing. Use lower gears to assist with deceleration; for manual transmissions, third gear is sufficient, which also helps reduce brake wear. Regular vehicle maintenance is crucial to ensure the brakes are functioning properly. In short, the lower the speed, the safer it is, protecting all passengers.
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