| | Lidar Photo Speed Enforcement
I am trying to find out "how" lidar photo speed enforcement works. In my particular case, I have been issued a photo ticket (where I was driving away from the detection unit) and was told I was doing 90 km/hr (25 m/s). In the photo there is another vehicle travelling in the same direction (but in the left lane where I was in the right lane). I have called the issuing office twice to have the technology and method explained to me and I still have an outstanding question.
Here is background leading to my question:
I was told that the "cross hairs" in issuing office's documentation (at the time the photo was taken) appears on the passenger side, rear bumper (close to my reflector of my 2009 Toyota Matrix). The distance away (according to the ticket) is 167 m. I was also told that the photo was taking 1/3 of a second AFTER the speed dedection.
Now my question:
The cross hairs being referred to - is that "where" the lidar was pointed to measure from? Also, in reference to these cross hairs, would the camera subsequently be aimed centrally to the same point (to ensure accuracy between the lidar and the camera)? If these are both true, then would it not make sense that if you were to do the math on 1/3 of a second, 25 m/s combined with the length of my car (4.365 m) that is would be VIRTUALLY impossible for me to have been detected because I was not within the path/range of the beam of detection? But I can tell you this, the vehicle in the left lane (which according to the photo is plainly ahead of me by an approximate 1 to 1.5 car lengths ahead and is a "larger" vehicle than mine).
I have been calling everyone possible (here in Edmonton Alberta) and no one has been able to provide any "useful" information. This is my last place to ask.