Calibration with different Screen Ratio and Framerate about speed-camera

[SpaceRichard]

So after some days with irregular results, I found my error.
I don't get that I should calibrate with the detected size (green frame) and not with the real car size.
As I have quite different size of the detected area/part It was hard to say the size correct.

So I used the area I want to use for detection 220px with are 4900mm - as R2L and L2R is the same distance (small street almost one lane) I think this would not make much differences.

I get now maybe 40-50% correct results or at least results that I would think could be correct.
But still a lot of cars drive here above 300km/h :)