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Virginia Reckless Driving

LIDAR, Radar – The Tools Used to Assess Reckless Driving Speeds in Virginia

January 12, 2012 | No Comments »

I have helped clients charged with speeding and Reckless Driving throughout Northern Virginia. Part of our law firm’s success in defending these charges is rooted in our detailed knowledge of the typical equipment used by area law enforcement to justify ticketing for Speeding and Reckless Driving.

In particular, Reckless Driving is a Class One Misdemeanor in Virginia that can have very serious consequences, including the potential for jail and a suspension of your driver’s license so it is very important that whatever attorney you choose to assist in your case has this kind of first-had experience.

LIDAR and Radar Use in Virginia Reckless Driving Stops

In the Commonwealth of Virginia more than 200,000 speeding tickets and Reckless Driving charges are issued each year by local police and State Troopers. There are three main methods law enforcement officers in Northern Virginia use determine the speed of our cars and trucks. These methods are Radar, LIDAR (or laser), and/or by pacing the speeding vehicle.

How Radar Guns Work

The word “Radar” is an abbreviation for “Radio Detection and Ranging”. The typical police radar gun uses radio waves and the Doppler Effect to determine the speed of a moving car. The Doppler effect states that the measured frequency of a wave is relative to the motion between the source and the observer.

When a radar signal hits the object that is moving toward the police vehicle, the returning frequency will be higher than the original. When the signal hits a vehicle that is moving away from the police car, the returning frequency will be lower than the original one. This frequency change is used to determine the speed of the target vehicle.

Doppler Effect Example, Via How Stuff Works

Doppler Effect Example, Via How Stuff Works - Click for Full Article

For instance, when a radar gun is used by police on Interstate 66, the radar sends radio waves of specific frequencies in a chosen direction. The waves then bounce off all objects, including vehicles, and return to the radar gun’s receiving station. When the waves reflect off a moving vehicle, a measurable frequency shift, called the Doppler Shift, occurs.

The radar gun computer then uses the frequency shift to calculate the speed of the moving vehicle.

The beam that emanates from the radar gun is conical in shape and continues outward indefinitely from the antenna until it is reflected, refracted, or absorbed. This radar beam transmits low level, non-ionizing radio frequency electromagnetic radiation.

The Golden Eagle, Virginia’s Choice

There are five types of radar guns that are regularly used in Northern Virginia jurisdictions: the Kustom Pro-1000, the KR-12, the Talon, the Stalker, and the Golden Eagle. The Golden Eagle, made by Kustom electronics, is used in most State Trooper vehicles in Northern Virginia for speeding and reckless driving tickets.

LIDAR Gun Example - Stalker Lidar Via Softpedia

LIDAR Gun Example - Stalker Lidar Via Softpedia

Because many of our clients have been stopped by Troopers using this device, the Gordon Law Firm purchased its own Golden Eagle radar. We have used the Golden Eagle and its operations manual to learn how the radar is properly used, the requirements for calibration and testing. and to be able to present to the court demonstrative evidence of how the device can produce inaccurate results through computer or operator error.

It is imperative that police officers who use radar guns are well-trained and have a good working knowledge of both the equipment they use as well as how radar works to calculate speeds. Depending upon several factors, our defense attorneys can successfully challenge Reckless Driving and Speeding charges at trial or obtain a favorable resolution of the case prior to trial.

What is LIDAR?

LIDAR (also known as Laser Radar or Ladar) is an acronym for Light Detection And Ranging. The LIDAR laser beam shoots 280 pulses per second and at 1,000 feet the beam is 3 feet square. The Laser Radar Beam travels 186,282 miles per second – that is 1 foot per billionth of a second.  This has many applications, including the ability to:

  • Measure distance
  • Measure speed
  • Measure rotation
  • Measure chemical composition and concentration

LIDAR allows law enforcement to instantaneously assess the speed of an individual vehicle. The LIDAR beam is usually aimed at the front of the car or rear license plate of a suspected speeding car. Unlike RADAR, the LIDAR can target specific vehicles to determine the speed. The LIDAR cannot be effectively operated from a moving police vehicle.

Judges, and the general public, often believe that the Lidar is more accurate than RADAR and we at the Gordon law Firm have been working hard to dispel that myth.Because the LIDAR is a precision instrument the testing, calibration, and operation in accordance with the manufacturer’s specifications is very important to guarantee accurate readings.

Pro-Laser III, Virginia’s Choice

The Pro-Laser III, made by Kustom electronics, is used in many police vehicles in Northern Virginia to issue speeding and reckless driving tickets. Because many of our clients have been stopped by law enforcement using this device, The Gordon Law Firm purchased its own laser speed measuring device, the last generation Pro-Laser II.

Example Radar Gun - Pro Laser III - Via Radar Detector Forum

Example Radar Gun - Pro Laser III - Via Radar Detector Forum

We have used the Pro-Laser II as demonstrative evidence at trial and we have reviewed and the operations manual of its newer cousin, the Pro-Laser III, to learn how it is properly used.

We are also very familiar with the requirements for calibration and testing of the Pro-Laser III. This is important in order for our lawyers to be able to present effective arguments in court concerning how the device can produce inaccurate results through computer or operator error.

Our criminal defense firm uses this information to attempt to successfully challenge Reckless Driving and Speeding charges at trial or obtain a favorable resolution of the case prior to trial.

If you have any questions or would like a FREE CONSULATION regarding your reckless driving charge, please contact our Northern Virginia office at 703-218-8416 or e-mail us.

You can reach me, Alex Gordon, via email at: thegordonlawfirm@gmail.com


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