What are the speed cameras?

We hear a lot about speed cameras these days. Almost all governments around the world are implementing speed cameras to improve road safety. In general, these cameras are also called traffic enforcement cameras.

Fixed Speed Cameras
Fixed Speed Cameras

Furthermore, there are numerous cameras for different traffic violations. It includes a red-light camera, speed camera, bus lane camera, road rule camera, road safety camera and so on. So, basically there are two types of cameras – mobile cameras and fixed cameras.

In addition, We can install speed cameras beside the road or over the road. Law enforcement vehicles can fix them on the top of a vehicle itself. These cameras detect traffic violations. Traffic violations include speeding, red traffic light violation, or vehicles going through the toll booth without paying the toll.

Worldwide speed cameras increase road safety. These cameras reduce 22-44% of road fatalities. Hence, fewer injuries on-road and more safety overall. Wider deployment of cameras will surely increase law enforcement and discipline among drivers.

How Do Speed Cameras work?

The speed cameras have two main types mobile and fixed. Some police cars having no markings have mobile cameras and look like normal cars. So, these cars are not easy to detect. These cars transmit radar beam across the road. When a vehicle crosses the radar beam it changes its frequency. Thus, it measures the vehicle speed according to change in frequency.

Furthermore, when a driver is traveling fast and over speeding, the system takes a photograph of the vehicle. Mobile cameras can change their location and can be on any road as they are mounted on vehicles.

The intersection cameras work differently. This camera depends on sensors in the road. These in-road sensors are located at a specified distance. These sensors determine the speed of the car by measuring the time taken to travel by a vehicle from one sensor to another. If a vehicle approaches with high-speed, then the camera clicks.

In addition, on highways and expressways cameras are mounted above the flow of traffic. They somewhat work like mobile cams. These cameras transmit a radar beam on the flow of traffic. This beam bounces back from the moving vehicle & enters into the camera again. It gives highly accurate speed data of the moving vehicle. If speed is higher than the speed limit, then the camera takes a photograph.

Monitoring and Verification

Furthermore, all traffic violations recorded by the camera undergo secondary speed verification. So, the system carries out two independent measurements of every traffic violation. Thus, these measurements are compared for consistency before issuing the fine. These systems have a small tolerance of 2 Kmph for fixed and 3 Kmph for mobile cameras.

In conclusion, speed cameras definitely add safety on the road. It also increases discipline among fellow motorists, thereby lowering accidents and injuries.

Image Courtesy: Citelum

Watch working of Speed Cameras

Read on: What is Google Fiber?