What is the actual speed when the display shows 60 mph?
2 Answers
If the actual driving speed is 60 km per hour, the speed displayed on the dashboard will range between 60 km and 67 km. Calculation formula: Displayed speed - Actual speed ≤ Actual speed / 10 + 4 km/h. When driving on roads without speed limit signs or markings, motor vehicles should not exceed the following maximum speeds: 1. Roads without a central dividing line: 30 km/h in urban areas, 40 km/h on highways; 2. Roads with only one motor vehicle lane in the same direction: 50 km/h in urban areas, 70 km/h on highways.
To be honest, after driving for so many years, I've noticed that car speedometers usually display a slightly higher speed than the actual speed. When it shows 60 mph, the actual speed is usually around 56 to 58 km/h. This difference is intentionally designed by manufacturers mainly for safety reasons, to prevent you from inadvertently speeding. I remember when I first learned to drive, I used my phone's GPS to measure the speed and only then realized this—when the speedometer showed 60, the GPS showed 57, which made me pay more attention to speed control. Especially on highways, even though the speed discrepancy is small, it can affect fines and accident risks. Manufacturers set this error margin based on tire size and sensor calibration, typically within 3% to 5%. I usually recommend keeping an eye on this while driving and using mobile apps like Gaode Maps to assist in measuring the actual speed, helping to avoid speeding troubles.
