What is the safest speed of the expressway?

The safest speed of expressway shall not exceed the maximum speed limit, and the maximum speed of expressway shall not exceed 120km. Generally, 90km/h to 1 10km is the theoretical safe speed on the expressway with speed limit of 120km, and the driving speed is the safest in this range.

The minimum speed of small motor vehicles on the expressway shall not be less than 60km/h, and the maximum speed shall not exceed120km/h. Usually, the normal speed of cars on the expressway is kept between 90-120km/h. ..

According to different high-speed road conditions and driving conditions, reasonable driving speed must be controlled:

1. When the weather is good, the light is sufficient, the line of sight is good, and the road surface is smooth, the speed can be controlled between110-120 km/h. If there is traffic ahead, you can predict it in advance, slow down and brake in time to ensure driving safety and avoid danger.

2. In rainy and snowy weather, when the road surface is flat and the line of sight is poor, it is usually recommended to control the driving speed within100 km/h. In case of moderate rain or heavy rain, the speed should be reduced to 60-80 km/h, and the front and rear fog lights or double flashing warning lights should be turned on at the same time. If there is ice on the road, the speed should be controlled within 40 km/h.

3. In windy weather, short-term crosswinds are easy to appear on highway bridges, which leads to out-of-control vehicles. In this weather, the speed should be controlled at 90km/h. When crossing the highway bridge, hold the steering wheel with both hands to ensure that the vehicle runs in a straight line.

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