What are the devices called that police use to clock how fast you are going?
2007-10-18 03:13:47 · 8 answers · asked by Anonymous in Politics & Government ➔ Law Enforcement & Police
Most of the ones in use by police departments are made by a company named Stalker. They are called Radar guns. Some operate by using Doppler radar and others operate by using laser.
Very basically, they shoot a radar wave or laser at a vehicle and a computer calculates how long it takes that wave to bounce back to the source (the radar gun itself.) This gives them the speed of the target vehicle.
2007-10-18 03:24:10 · answer #1 · answered by Anonymous · 2⤊ 1⤋
There are several RADAR, Laser, VASCAR, and a speedometer pace.
RADAR, sends out a radio wave that changes in relation with the speed of the vehicle. The faster the vehicle, the more the frequency changes. This bounces off the car, returns, and is read by the unit.
Laser, sends out a series of light pulses. The pulses bounce off the vehicle, and the unit times how long it takes to get back, and converts this into speed.
VASCAR: Visual Average Speed Computer And Recorder, This times the vehicle going though two marked points. This is used primarily on the open highway, where you see thick white lines painted across the lanes. They simply time you between the points, which are a known distance, and the computer uses the formula speed = distance / time. Also used by aircraft patrol
Speedometer pace, all officers have their speedometer calibrated, and are taught how to follow a vehicle and get a pace, using their own speedometer. They can do a short pace by pulling up next to you in the other lane, or they fall back a set distance, usually determined by the stripes between the lanes, which are at set intervals.
Then there is the professional opinion: usually called Too Fast For Conditions, or Unreasonable/Imprudent Speed. These are usually a result of accident investigaiton, when the officer didn't clock you, but the evidence shows you were speeding.
2007-10-18 04:57:10 · answer #2 · answered by trooper3316 7 · 1⤊ 0⤋
RADAR - RAdio Detection And Ranging
LIDAR - LIght Detection And Ranging
VASCAR - Visual Average Speed Computer And Recorder
and the good old follow behind you and watch the speedometer.
2007-10-18 12:28:07 · answer #3 · answered by Officer 4 · 1⤊ 0⤋
Radar
2007-10-18 03:23:01 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Most common types used are radar and lidar.
2007-10-18 07:52:41 · answer #5 · answered by Anonymous · 1⤊ 0⤋
Laser or radar
2007-10-18 03:16:35 · answer #6 · answered by Anonymous · 0⤊ 1⤋
radar guns
2007-10-18 03:17:00 · answer #7 · answered by jennifer a 2 · 0⤊ 1⤋
radar detector
2007-10-18 03:21:14 · answer #8 · answered by Michael M 7 · 0⤊ 2⤋