What is the actual speed when the dashboard shows 70 km/h?

[StAmelia]

When the dashboard displays a speed of 70 km/h, the actual speed is typically between 66-68 km/h. The speed shown on the dashboard is intentionally higher than the actual speed. This is not a malfunction of the vehicle but rather a safety measure designed to ensure driving safety. The discrepancy is deliberately set to be small, generally within a range of 3% to 5%. For ordinary vehicles outside highways, the penalties for speeding are as follows: No penalty for exceeding the speed limit by less than 10%; a fine of 50 RMB and 3 demerit points for exceeding the speed limit by 10% to less than 20%; a fine of 50 RMB and 6 demerit points for exceeding the speed limit by 20% to less than 30%; a fine of 200 RMB and 6 demerit points for exceeding the speed limit by 30% to less than 50%; a fine of 1000 RMB and 12 demerit points, with possible license suspension, for exceeding the speed limit by 50% to less than 70%; a fine of 2000 RMB and 12 demerit points, with possible license suspension, for exceeding the speed limit by 70% or more. On roads with speed limits below 60 km/h, a warning is issued for speeding less than 50% over the limit. Special vehicles such as medium and large passenger trucks, commercial vehicles, school buses, and hazardous material transport vehicles are subject to their specific regulations. Speeding penalties differ between highways and ordinary roads. This setup is for safety considerations, and there is no need to worry about the impact. A discrepancy of 1-3 km/h is minimal and can ensure driving safety in critical moments.

[CodyFitz]

I've been driving for many years and noticed the dashboard speed is always slightly higher than the actual speed. For example, when it shows 70 km/h, GPS measurements might indicate 67 or 68 km/h, with the difference typically ranging between 3% to 5%. This is intentionally designed by manufacturers to prevent speeding, as regulations require speedometers to never display a value lower than the true speed. Tire condition also affects the discrepancy – severe wear reduces tire diameter, potentially making the speedometer even less accurate. I've personally tested this on highways: new tires show smaller differences, while old tires may exhibit greater errors. Don't fully trust your dashboard when driving, especially in areas with speed cameras – frequently use mobile speed measurement apps to check actual speed. Regular tire replacement and maintenance can minimize errors, ensuring safer and more confident driving.

[VonJulianna]

Speedometer errors are common, with the actual speed being around 67 to 68 km/h when the dashboard displays 70 km/h. Reasons include the vehicle speed sensor, tire size tolerances, and safety regulation designs. I usually check these factors: tire wear reducing diameter increases the error; new tires are relatively more accurate. Regulations such as ECE standards require the indicated speed to be slightly higher to prevent speeding. GPS is a reliable tool for measuring true speed, which I use to test discrepancies under different road conditions. At high speeds, it's important to maintain a reasonable speed to avoid unexpected tickets. Simply put, don't rely solely on the speedometer reading; using GPS as a reference while driving is more reliable.

[OFrank]

The dashboard shows 70, but the actual speed might be slightly lower, around 67. Car designs intentionally make the speedometer display a bit higher for safety reasons, to prevent speeding. The margin of error is small, typically between 3% to 5%. The discrepancy becomes more noticeable with older tires. Don't worry, it's a normal phenomenon. You can use your phone's GPS to check the real speed.

[SabrinaFitz]

Dashboard discrepancies affect safety. If it shows 70 km/h, the actual speed is approximately 65 to 68 km/h, a 3-5% error that may cause you to unknowingly exceed the speed limit. GPS is a good method for testing; I often use mobile apps on highways to verify the real speed. Tire wear increases the error, so it's advisable to regularly check tire dimensions. Monitor speed changes while driving to avoid tickets or accidents. For safety, treat the dashboard as a reference only.

[Clarence]

When the speedometer shows 70 km/h, the actual speed might be 67 or 68 km/h. Multiple factors contribute to this discrepancy: regulations require speedometers to display slightly higher to prevent speeding; tire size inaccuracies (e.g., reduced diameter due to wear) worsen the deviation; GPS speed measurement is more reliable. In my daily driving, I've noticed smaller discrepancies on highways, but they can be larger in urban areas. Maintaining tires is crucial, as new tires have smaller errors. Using GPS to verify speed is recommended, and paying attention to speed on highways helps mitigate risks. Simple maintenance can reduce these differences.