Originally posted by Nic_ContourSE99:
I wanna know if police, particularly in QC have a device to catch your speed while they follow you. Kind of a radar in motion.




Most (all?) vehicle mounted police radar units have a 'moving mode', but only the most recent ones can track vehicles moving in the same direction as the patrol car.

See:
Living with Police radar

Stalker Direction Sensing Police Radar

Introduction to Radar - USA

Points are what you loose when they tag you with Radar

Cheers,
--
Terry McG