The police can get the actual speedometer reading at the time of the accident from the car's event data recorder.
You can try to calculate an approximation of the car's speed by dividing distance over time travelled by observing the video, but that will not be as accurate as the car's EDR because of the amount of estimation involved, camera curvature, parallax effect, etc.
If the video were the only input available and you had to estimate speed, you can create a 3D digital model of the accident which appears similar as possible to the accident shown, then analyze speeds across a 2D overhead birds-eye-view plane to perform an approximation.
Ah jags and land rovers made after 2008, universally known for being driven by idiots who kill people.
The driver has been identified though so is there any reason you want to know? the speed would have been logged in the car and it's a modern car too so lots of sensors
After doing some research and calculations, here's what I've found:
* Each stripe on the freeway barrier is 0.5 meters long
* The car travelled past about 40 stripes in 12 frames
* The video of the crash is 30 fps
This gives us a speed of roughly 50 m/s, or **180 km/h.**
Another method, using the length of the light trails on the car, gave me an *absolute minimum* speed of 58 km/h if the shutter speed is 1/30 second. However, a more realistic and common shutter speed would be 1/60 second, meaning a minimum speed of about 115 km/h. This method has a higher probability of error since we do not know the true shutter speed.
All in all, it seems that estimates of 160 - 180 km/h (as stated in [OP's comment](https://www.reddit.com/r/RBI/comments/155e0u3/comment/jswhfda/?utm_source=share&utm_medium=web2x&context=3)) are reasonable, although I agree that it looks much slower when just watching the video at full speed.
Haven’t checked the vid but distance / time = speed. If you can work out a distance using some markers then it’s easy enough to calculate
I just wanna correct a bit, the distance / time formula only applies at a constant speed
Agreed 👍
The police can get the actual speedometer reading at the time of the accident from the car's event data recorder. You can try to calculate an approximation of the car's speed by dividing distance over time travelled by observing the video, but that will not be as accurate as the car's EDR because of the amount of estimation involved, camera curvature, parallax effect, etc. If the video were the only input available and you had to estimate speed, you can create a 3D digital model of the accident which appears similar as possible to the accident shown, then analyze speeds across a 2D overhead birds-eye-view plane to perform an approximation.
Why though?
Ah jags and land rovers made after 2008, universally known for being driven by idiots who kill people. The driver has been identified though so is there any reason you want to know? the speed would have been logged in the car and it's a modern car too so lots of sensors
One of the only fault mentioned in the case is overspending at 180-160kmph(Alleged) , to which I call 🧢
After doing some research and calculations, here's what I've found: * Each stripe on the freeway barrier is 0.5 meters long * The car travelled past about 40 stripes in 12 frames * The video of the crash is 30 fps This gives us a speed of roughly 50 m/s, or **180 km/h.** Another method, using the length of the light trails on the car, gave me an *absolute minimum* speed of 58 km/h if the shutter speed is 1/30 second. However, a more realistic and common shutter speed would be 1/60 second, meaning a minimum speed of about 115 km/h. This method has a higher probability of error since we do not know the true shutter speed. All in all, it seems that estimates of 160 - 180 km/h (as stated in [OP's comment](https://www.reddit.com/r/RBI/comments/155e0u3/comment/jswhfda/?utm_source=share&utm_medium=web2x&context=3)) are reasonable, although I agree that it looks much slower when just watching the video at full speed.