Great answer Blocker.
Robic Chronometers are used to determine the speed of a specific vehicle in the same manner as a VASCAR system, although with a handheld stopwatch, the police officer can now be sitting at the side of the road having a coffee for all you know. There's no radar, no loops, no tell-tale signs. Just a plain and simple digital stopwatch, and two points a known distance apart. The officer inputs the distance into the stopwatch (accurate to 1/1000th of a mile or km) and then just presses 'Start', then 'Stop'. The Mk1 device shows the speed in the top-right corner whilst the Mk2 device shows it in the main display area. The display speed can be in either mph or kmh, the timing is accurate to 1/100 second (even if the officer isn't), it can count 999 vehicles before needing to be reset, and never needs calibrating. Oh, and it's back-lit so it can be used in the dark too. Stealth police! They came into use originally with foot-patrols in estate areas.
Good luck fighting it..
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