The paper shows that if a car stops at a stop sign, an observer, e.g., a police officer, located at a certain
distance perpendicular to the car trajectory, must have an illusion that the car does not stop, if the
following three conditions are satis ed: (1) the observer measures not the linear but angular speed
of the car; (2) the car decelerates and subsequently accelerates relatively fast; and (3) there is a
short-time obstruction of the observer's view of the car by an external object, e.g., another car, at
the moment when both cars are near the stop sign.
Read the preprint paper in arXiv.org