Don’t confuse radar with laser. Why it's so hard to fight a laser speeding ticket August 5, 2011 A reader who was clocked speeding at 138 km/h wonders how bullet-proof the police officer's laser reading will be in court. Lasers require a reflective surface. If the officer does not have proper training in the use of the gun, then the laser reading cannot be relied on as evidence against you. Quite a difference.So, where there are several vehicles, as described by the reader, the officer aims the laser, using the scope or HUD (heads-up display) and sees the little red dot. Since most tickets are based on evidence gathered by radar or laser speed detection devices, the following will focus on the main challenges to these two types of evidence. He may have wanted to see if you did anything else illegal or was looking for signs of impaired driving. Since most tickets are based on evidence gathered by radar or laser speed detection devices, the following will focus on the main challenges to these two types of evidence. So the surface of the target vehicle must be reflective for the laser to give an accurate reading. If it is not calibrated properly before use, it will affect the readings. Consult with an experienced traffic violation attorney if you have been issued a laser speeding ticket. Roy Reyer ("Radar Roy") - A retired police officer of 20 years proffers these thoughts on how to beat a speeding ticket for your benefit:Being a cop for 20 years, I was also a defensive driving instructor for 10 years and was an instructor for the Arizona Superior Court Ticket Diversion Class. But most radar devices are mounted inside the patrol car.
Radar can measure the speeds of drivers while the officer’s patrol car is moving or stationary. All price, payment, and other information provided by this tool is subject to change without notice and is not meant to be relied upon.
Lidar devices can’t be used in a moving patrol car.A VASCAR (“visual average speed computer and recorder”) device is an electronic stopwatch that’s connected to the speedometer of a patrol car. Generally, a certified technician must calibrate the device every 60 days to three years. I was driving through "a well-known-local-speed-trap" as I referred to it later. Get the Manufacture’s Manuals.
He/she places the dot on the front of a vehicle coming towards him/her and obtains a reading for that particular vehicle. Because the laser beam is invisible, there’s no way of knowing whether the device is aiming accurately at the target vehicle, unless the officer frequently performs a sight alignment test.Radar (“radio detection and ranging”) sends radio waves that reflect off the target vehicle and return to the unit. Finance/lease charges are rough approximations for illustration purposes only; you must arrange and determine your actual finance or lease rates with your selected dealer / finance provider on approved credit. If the officer moves the device, even slightly during operation, the light beam can reflect off different parts of the target vehicle, resulting in an incorrect reading.Another common challenge to speed-measuring devices involves arguing that the device produced a false reading because of some kind of interference.Speeds measured by radar, LIDAR, and VASCAR devices are generally more accurate than an officer’s visual estimation of speed. If you establish the officer's training is insufficient in conjunction with a circumstance that shows the lack of training, a court can dismiss the case.
Facing the results of a speeding ticket are much, much worse. To determine the speed of the target vehicle, the device calculates the change in distance.All speed-measuring devices rely on an officer’s input to some extent—so, human error is a possible cause of erroneous speed measurements.The officer measures the distance between two preselected points. You can successfully beat a laser speeding ticket in court.
Misidentifying the target vehicle is also more likely to occur in heavy traffic and as the distance between the radar and target vehicle increases.Because the laser light beams used in LIDAR devices are narrower and spread less over a given distance than radar beams, the possibility of mistakenly measuring the speed of a nearby vehicle is reduced—though not entirely eliminated.Other maintenance issues can also lead to inaccurate measurements.
Some states also require officers to test the speed-measuring device at the beginning and end of each shift. Because most judges assume a radar measures speed with perfect accuracy and precision, arguing against a police officer or photo radar's clocking speed can seem futile, as if …
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