Police officers in Norfolk use a variety of methods to determine whether a driver is driving too fast in and around Norfolk. Officials are using a variety of tools, including RADAR and LIDAR, to determine the speed in Virginia. The Radar / Lidar instruments used in Va. are generally considered to be extremely precise.
Officials prove the accuracy by presenting a certificate of verification. If an officer proves that his equipment is properly calibrated, it is considered reliable and accurate. However, if for any reason the officer does not have a certificate, or if the certificate is missing or contains false information, this opens the door for the defense to exclude the equipment as a result.
RADAR or LIDAR devices are not their subject if they are considered by the court to be very precise. Sometimes lawyers can get a police officer to admit that it is the wrong object, but this is extremely difficult to prove in court. This can happen when the officer is in a position where it is difficult to fire a direct shot at the vehicle, such as in heavy traffic. Even if operating errors do not occur very often, it can still be argued that they are proven in court.
In the case of speeding in Norfolk, speeding is when a police officer begins to drive behind a target vehicle and corresponds to the speed of the vehicle. In other words, he looks at the car in front of him to see how fast the targeted car is going, and not behind it. Speed is not his thing, but it is admissible as evidence in court. Sometimes it is possible that the speed at which the officer believes that the driver is travelling is actually too high and therefore inaccurate. At other times, it may be that an official does not exactly match the speed of the vehicle or his own speedometer is off. Therefore, if the actual speed at which he believes a driver is travelling is inaccurate, he cannot win over the accused.