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The radar beam. hits oncoming cars, and is reï¬ected back. to the radar unit, which can calculate. speeds from those reï¬ections. Radar can be used from a police car. thatâs either stationary or moving, since. it does not require precise aiming to. clock traï¬c speeds. There are also hand-. held units that can be operated from a. car, motorcycle, or an oï¬cer standing at. the side of the road.
Basic Speed Law is drive no faster than it is safe. Minimum speed limit is if you drive slower than this speed you will get a ticket Just like you were speeding, But Impeding the free-flow of traffic. Advisory speed limit is just that an advised speed limit. You can go faster or slower without getting a ticket as long as it is safe to do so.