Is the maximum speed 20 or 30 when visibility is 50 meters?
2 Answers
When driving a motor vehicle encountering fog, rain, snow, or other conditions with visibility within 50 meters, the maximum speed must not exceed 30 km/h. Below are the relevant details: 1. On highways: When visibility is below 200 meters, the speed limit is 60 km/h; when visibility is below 100 meters, the speed limit is 40 km/h; when visibility is below 50 meters, the speed limit is 20 km/h, and the vehicle should exit the highway as soon as possible (meaning to find the nearest exit and leave the highway promptly). 2. Article 58 stipulates: When driving at night without street lights, poor lighting, or encountering low visibility conditions such as fog, rain, snow, dust, or hail, motor vehicles should turn on the headlights, position lights, and rear lights, but when the following vehicle is driving close to the preceding vehicle in the same direction, the high beams should not be used. Motor vehicles driving in foggy conditions should turn on the fog lights and hazard warning flashers.
I always pay close attention to safe driving rules. In conditions with 50 meters of visibility, the maximum recommended speed is generally 30 kilometers per hour. This comes from standard traffic regulation recommendations because braking distances increase significantly in low visibility conditions. For example, on dry pavement, the braking distance at 30 km/h is about 10 meters, but on wet or foggy roads, it can double or even exceed 20 meters. With visibility at only 50 meters, it means you have less than a second to react to vehicles ahead. If the speed is too high, such as 40 km/h, the risk of rear-end collisions or loss of control increases dramatically. I recommend turning on fog lights, reducing speed to around 25 km/h in such weather, and leaving extra safety margin. Checking the vehicle's braking system is also crucial to avoid failure in critical moments. These rules aren't rigid—20 km/h might be a more conservative option—but in most urban or highway conditions, 30 km/h is the upper limit to balance safety and efficiency.
