
On national highways, the average speed is 60-80 km/h; on expressways, it generally exceeds 100 km/h. Below is relevant information: Calculation formula: Because: Average speed refers to the ratio of the displacement of an object's movement to the time taken during a certain period. It is a vector quantity with directionality. Or, it represents the average speed of an object over a time interval. Calculation formula: s ÷ t = average speed. Therefore: s = 5 kilometers, t = 6 hours, average speed = 5 kilometers / 6 hours ≈ 0.833 km/h. Notes: The intermediate stop time is included in the total travel time, so it should be calculated.

I've been commuting by car for many years, and the average speed of a car really can't be generalized. In the city, traffic jams are common, so the average speed is only about 25 to 40 kilometers per hour. For example, my daily 20-kilometer commute from home to work, including traffic lights and traffic flow, takes about half an hour if I'm fast, averaging around 30 kilometers per hour. There are many influencing factors: speed drops when traffic conditions are poor, and peak hours should be avoided; it also depends on the type of vehicle—SUVs with a higher center of gravity can't go as fast, while my sedan averages a bit higher; road conditions are also crucial, slowing down is necessary in rain or on winding roads. I recommend developing good habits, such as checking road conditions in advance, using navigation to find shortcuts, and avoiding sudden braking, which can slightly increase the average speed. Maintaining a daily driving speed of around 40 kilometers is reasonable and safe, while long-distance or highway driving can exceed 60 kilometers, but always remember that safety comes first.

Drivers navigating big cities know all too well that average car speeds are disappointingly low, typically hovering between 30 to 45 kilometers per hour. Living in central Beijing, my commute through congested zones averages a mere 28 km/h—why? Too many traffic lights, jaywalking pedestrians, and constant stop-and-go driving! Global data shows megacities like Shanghai and Tokyo struggle to hit even 30 km/h averages, directly impacting travel efficiency and fuel waste—idling in traffic guzzles gas and spikes emissions. To improve, try off-peak travel (e.g., running errands during lunch breaks) and never skip maintenance: proper tire pressure and engine tuning help, while compact cars outpace bulkier vehicles long-term. Urban planning upgrades like optimized signals and bus lanes may nudge speeds upward, but ultimately, traffic woes stem from driving environments—stay patient, stay safe.

On highways, the average speed of a car is much higher, typically between 70 to 100 kilometers per hour. I prefer long-distance driving, and my experience shows that on open roads, maintaining an average of 80 km/h is effortless, but during peak hours, it drops to just over 60. Distance plays a significant role: short commutes have lower averages, while a 500-kilometer trip can average up to 90 km/h. The vehicle is also crucial—sports cars, with their quick response, tend to have higher averages, while SUVs balance stability with speed. Remember, the average is not the top speed; it includes stops and breaks. Driving smoothly with fewer lane changes and using cruise control can improve efficiency. Avoid speeding and sudden braking to ensure safety and sustainability.


