
It depends on the car model and driving conditions, typically ranging between 60-120 km/h for sedans. Below is relevant information: 1. "Road Traffic Safety Law of the People's Republic of China": Pedestrians, non-motor vehicles, tractors, wheeled special-purpose machinery vehicles, articulated buses, full-trailer trucks, and other motor vehicles with a maximum design speed below 70 km/h are not allowed on expressways. Motorcycles are not included in these prohibitions. 2. "Implementation Regulations of the Road Traffic Safety Law of the People's Republic of China": Expressways must indicate lane speed limits, with a maximum speed not exceeding 120 km/h and a minimum speed not below 60 km/h. On expressways, the maximum speed for small passenger vehicles must not exceed 120 km/h, other motor vehicles must not exceed 100 km/h, and motorcycles must not exceed 80 km/h. According to these speed limits, motorcycles can only travel in the outermost lane of the expressway.

I commute by car every day, typically maintaining speeds between 30 to 50 km/h on urban roads. During rush hours in the morning and evening, traffic congestion often reduces speeds to 20 km/h or even lower. On highways, it's much more comfortable, with mainstream speeds ranging from 100 to 120 km/h. I've also noticed a slight discrepancy between the actual speed and the GPS display, as tire wear can affect the instrument readings. For long business trips, maintaining a steady speed around 110 km/h is the most fuel-efficient and safest. Traffic conditions also have a significant impact; for instance, speeds need to drop below 80 km/h in rainy or foggy weather. The key is to adapt to the flow of traffic—avoid sudden acceleration or deceleration to prevent rear-end collisions. In summary, for daily driving, 50 km/h is the safe upper limit in urban areas, while 120 km/h is a reasonable speed on highways. Following these rules ensures smoother driving and helps avoid traffic tickets.

As an experienced driver, I emphasize that car speed is directly linked to safety risks. Driving below 50km/h on city streets ensures pedestrian safety, while exceeding 60km/h significantly increases the chance of accidents. On highways, maintaining a speed between 100 to 120km/h is appropriate, but if traffic is slow or weather conditions are poor, it's advisable to reduce speed to 90 or 80km/h. I remember once driving too fast during a storm and nearly losing control—a profound lesson. The key is to adhere to local speed limits, such as the national maximum of 120km/h on highways. Speeding not only results in expensive tickets and higher fuel consumption but, more dangerously, cuts reaction time in half. Everyone should develop the habit of checking the dashboard speed to ensure steady driving, protecting both themselves and their children's safety.

Having been into car modification for years, I'm particularly fascinated by top speeds. Regular family cars can reach 160 to 190 km/h in unrestricted zones, while high-performance sports cars easily exceed 250. My modified hot hatch once hit its 220 km/h limit, but that's strictly for track use. In real-world driving, engine design and aerodynamic drag are crucial – high horsepower doesn't mean driving fast daily. Maintaining 50 km/h is sufficient in cities, with 120 km/h being ideal on highways. However, speedometer inaccuracies are common, so regular calibration is advised. Safe modifications are the essence of fun – no street racing that endangers others and damages cars. After all, cars are for enjoyment, not life-risking.


