…Just says there’s a transponder that’s supposed to judge if there was movement. It says nothing about how said transponder achieves that judgement. It doesn’t simply senses movement as you astutely pointed out the car very obviously moved. That means it needs a reference point.

So Is it gps? Is it an accelerometer? Is there another sensor on the grid it has to cross? Is it telemetry? Why is there this much wiggle room?