Cops have a few different ways of knowing which cars are speeding. One way is by using radar guns. Radar guns work by sending out a signal that bounces off of objects and then measures the speed of the object based on how long it takes for the signal to bounce back. Cops can point the radar gun at a car and get an instant readout of the car’s speed.

Another way cops can tell if a car is speeding is by using a device called a pacing radar. Pacing radar works by the cop matching the speed of his or her vehicle to the vehicle of interest and then measuring the time it takes to cover a known distance. This method is not as accurate as using a radar gun but it can give the cop a good ballpark estimate of the car’s speed.

Cops can also tell if a car is speeding by simply watching it. This is the most basic method but it can be effective if the cop has a good view of the car and can tell that it is going faster than the posted speed limit.

So how do cops know which car is speeding? There are a few different ways but the most common are by using radar guns or by pacing the car with their own vehicle.

## How do cops know which cars are speeding?

Answer 1: Cops use radar guns to determine which cars are speeding.

## How accurate are radar guns?

Answer 2: Radar guns are pretty accurate but there are a few factors that can make them less so.

## How do those factors affect radar gun accuracy?

Answer 3: Factors that can affect radar gun accuracy include the type of gun the weather and the terrain.

## Do cops use other methods to determine which cars are speeding?

Answer 4: Yes cops can also use things like pacing and LIDAR to determine which cars are speeding.

## What is pacing?

Answer 5: Pacing is when a cop follows a car and matches its speed to determine if it is speeding.

## What is LIDAR?

Answer 6: LIDAR is a laser-based speed-measuring device.

## How do cops use LIDAR?

Answer 7: Cops use LIDAR by pointing it at a car to determine its speed.

## How effective is LIDAR?

Answer 8: LIDAR is very effective and is considered to be more accurate than radar guns.

## Do all cops use LIDAR?

Answer 9: No not all cops have LIDAR but many do.

## How do cops without LIDAR determine which cars are speeding?

Answer 10: Cops without LIDAR can still use other methods like pacing and radar guns.

## Are there any downsides to using LIDAR?

Answer 11: One downside to using LIDAR is that it is expensive.

## How much do LIDAR devices cost?

Answer 12: LIDAR devices can cost thousands of dollars.

## Do all cops have LIDAR?

Answer 13: No not all cops have LIDAR but many do.

## How do cops without LIDAR determine which cars are speeding?

Answer 14: Cops without LIDAR can still use other methods like pacing and radar guns.

## Are there any downsides to using LIDAR?

Answer 15: One downside to using LIDAR is that it is expensive.

## Drew Dorian

I love cars and I love writing about them