Measuring Speed by Video

[Thirdgen89GTA]

Your method is right on, but you are making it too complicated. You have no need to know the wheelbase of the vehicle as the wheelbase does not change. You only need to have a recognizable object marker for measurement. Then you just need to divide the Distance travelled by the elapsed time between A and B.

If it covered 50ft in .5 seconds that works out to 68mph.

Rather than use markers on the curb, use markers on the pavement directly. Two pieces of tape set apart by a known length is adequate. The lens distortion is still there, but because the close proxmity of the mark to the vehicle you don't need to worry about distortion, it becomes a moot point.

[millzee]

show the video at full speed and we'll tell ya if it's quick, lol.