What is the slowest speed allowed on national highways?
2 Answers
National highways are mixed-use roads with only maximum speed limits, not minimum speed limits. Most national highways starting with 'S' currently have a speed limit of 80, and many are set at 60. As long as you do not exceed 80, you generally won't encounter any issues. Please follow the speed limit signs posted on the road. Below is an introduction to tire speed ratings: 1. The further back the letter representing the tire speed rating is in the alphabet, the better the tire's performance and the higher its price: Tires with different speed ratings have different applicable ranges. P—T grade tires (maximum speed 150—190 km/h) are suitable for small and compact cars, U—V grade tires (maximum speed 200—240 km/h) are suitable for mid-to-high-end cars, and the highest-performing W—Z tires, which can withstand speeds between 240—300 km/h, are typically used in large luxury cars and supercars. 2. The higher the speed rating, the better the tire's heat resistance: This is because the tire must withstand the heat generated by itself and the external environment when operating at its maximum speed rating. From the perspective of tire design and material requirements, under normal circumstances, for tires of the same brand and size, the higher the load index and speed rating, the better the performance and the higher the price.
Regarding the minimum speed limit on national highways, I have researched relevant information. According to traffic regulations, there is no explicit statutory minimum speed limit for China's national highways. However, in practice, the speed should not be lower than 50 kilometers per hour, otherwise drivers may face fines or penalty points for obstructing traffic. Specific road conditions such as weather and road surface conditions can affect this lower limit. For example, it's safer to appropriately reduce speed during rainy and slippery conditions, but it should not drop below 40 kilometers per hour to avoid becoming a traffic hazard. I've seen reports where many drivers were fined 200 yuan for causing congestion or rear-end collisions due to low-speed driving. Therefore, when driving, I try to maintain at least 50 kilometers per hour and use cruise control to keep a steady speed. Remember, national highways have heavy traffic flow, and driving too slowly is not only dangerous but also burdens others. Following the rules benefits everyone.
