Owning a dash cam that records your car’s speed can be beneficial in potentially avoiding speeding tickets, fines, and points on your driver’s license. The recorded footage could also serve as valuable evidence, not only for your own benefit but for others as well, should your camera capture an accident unfolding in front of you.
There have been numerous instances where video footage from dash cams has been used as evidence in court proceedings. Therefore, investing in a dash cam can be a wise decision, as it can help you avoid the hassle of a legal case if you can provide evidence that the speeding ticket was unjustified.
Why is capturing speed data with a dash cam a beneficial practice?
Speed cameras are typically calibrated to an accuracy of around 2%. Aoedi speed cameras capture vehicle speed by taking two photos over road markings, while mobile speed cameras, similar to those used by the police in speed traps, often employ gun-type technology that utilizes the Doppler effect for speed measurement. Meanwhile, ‘red-light’ cameras commonly track vehicles through radar or buried electric detectors in the road surface. All of these methods rely on precise calibration, which can occasionally be inaccurate. In such cases, an accurate speed reading from a dash cam has been known to successfully challenge speeding tickets in court, especially when it’s revealed that the speed camera hasn’t undergone recent recalibration.
Is a dash cam’s speed recording more accurate than the car’s speedometer?
A car’s speedometer tends to be slightly more accurate at lower speeds, as it derives its data from physical sources within the car, such as the tires and the drive shaft. On the other hand, a dash cam with GPS relies on satellite signals, and as long as there isn’t excessive interference from trees or buildings, it can provide highly accurate speed measurements. However, it’s important to note that both methods of measuring speed are generally quite precise, with only a one or two-mile-per-hour difference in the results.
How is speed measured by a dash cam?
There are several methods by which a dash cam can measure speed:
- One common approach involves using the recorded footage and software capable of tracking objects within the video. Speed is calculated by monitoring the movement of objects across the frame.
- Another method utilizes optical flow algorithms, which track objects across multiple frames in the video. Both of these methods rely on good video quality, as blurry footage may not be considered admissible evidence.
- The third and most precise method involves the dash cam’s GPS functionality. This technology relies on satellite reception to provide the most accurate recording of the car’s speed, assuming there is minimal interference with the reception.
In summary, dash cam speed recording is generally quite accurate. At Viofo, our cameras offer clear imaging and GPS tracking to ensure precise speed recording. Of course, the best way to avoid needing such evidence in a court situation is to adhere to speed limits on the roads. However, having vital evidence to help determine fault in an accident can make you a modern-day hero, coming to the aid of another driver in need.
Post time: Oct-10-2023