I should also add that the set fine is $108.75, which I believe is for 29 km/h over not 39 km/h over.
My plan is to argue the following;
1) I haven't had a speeding ticket in 14 years of driving and do not think I was going that fast. I recall that I was at the crest of a hill while passing an erratic braker, which would have been my max speed. The overpass where he had a tripod setup was about 400 m away (google maps). This alone questions the accuracy of the device, but I'm not sure how to submit this as fact.
2) I am not guilty for "committing the offence of speeding 129 km/h in a posted 90 km/h". I have google street views of the 100 km/h signs just before the overpass, but isn't that common knowledge? I find it strange that if they were working a speed trap that they would get the posted limit wrong?
The worse case is they amend the ticket to read 129 km/h in a posted 100 km/h and the set fine amount is unchanged. I guess I have nothing to lose, but would appreciate any advice.
Thanks