Last week, when i got the first speeding ticket while i was racing with one of my friend, then i am forced to take a look at the technology of interceptor traffic vans, how exactly they works and thought of sharing this with all of you so that you could also be careful before accelerating your bike to it’s limits.

Traffic Interceptor Van
Traffic Interceptor Van
Photo Courtesy: mybangalore.com

This is the front view of traffic interceptor van of which you should be careful while driving. Tough if you see this van from front-side then surely you shouldn’t worry. You should worry if you see this van from rear portion. Like below:

Traffic Interceptor Van
Rear View of Traffic Interceptor Van
Photo Courtesy: mybangalore.com

Here is a more clear view of the camera and radar gun which really catches the offenders.

Laser gun And Camera
Photo Courtesy: mybangalore.com

First confusion which i would like to clear from everyone’s mind is that the camera fitted at the top of the van is not the one which captures your speed. The camera that is capable of a 360 degree of rotation can easily find out vehicles that are wrongly parked, or even identifying vehicles that have previous violation cases against it.

The main camera is sitting in the back side of the van which won’t be visible to you as it is hidden behind the door.

How it Works:

The main question is that how this all setup works. Well the answer to that question is Radar gun. There are two types of radar guns present in use. One is Regular radar or Frequency based radar and other is LIDAR (Light detection And Ranging) radar.

Radar guns are, in their most simple form, radio transmitters and receivers. They send out a radio signal, then receive the same signal back as it bounces off the objects. However, the radar frequency is different when it comes back, and from that difference the radar gun can calculate object speed. These radars works on the basis phenomenon which is known as Doppler shift.

Frequency Based Radar: While using this radar, it should be stationery and shouldn’t be moving to measure the speed of the vehicle, but this type of radar is not much successful in the cases when the source is also moving. This is the radar which police department is using from last 50 years but this radar is not completely accurate and not efficient enough. Due to which we are now using a more advanced technology which is known as LIDAR.

LIDAR – This is a light imaging and detecting radar. This radar uses a laser beams instead of the traditional radio waves. This radar may take several hundred samples in less than half a second, so they are extremely accurate and this is what currently the vans roaming around in bangalore are using.

Say Cheese:

Earlier police was using hand help radar guns and tracking down the offenders but now the complete system is automated. The gun shoots the laser beam at any vehicle, determines the speed of the vehicle, and when it is detected that the vehicle is moving at high speed, the system triggers a small camera (which is highly powerful) and takes the picture of the number plate and driver’s face. And this is enough evidence to give you a speeding ticket.

Jammers:

Well where there is a Rule, there is always a way to break the rule. To get around with these radar there are different types of jammers in the market, which could help you. Few of them are simply the radar detectors, so they will only alert you as soon as they detect that someone is trying to measure the speed, they will alert you and if lucky then you can get enough time to slow down your speed before the police van gets a lock on you.

Some of them are more advanced than these jammers and they initiate a defense mechanism as soon as they detect some signals from police vans. Well to be frank, none of them is 100% full proof, and neither of them are really active in India or Bangalore, because we only have few vans running around to catch the speed (around 20 in Bangalore)

Speed Limits in Bangalore:

  1. Within City – 40 Km/hr for two-wheelers and 50 Km/hr for four-wheelers
  2. Ring Roads – 50 Km/hr for two-wheelers and 60 Km/hr for four-wheelers
  3. Highways – 60 Km/hr for two-wheelers and 80 Km/hr for four-wheelers

Conclusion:

The conclusion from the above discussion is that the Police department is now using high tech stuff to catch the offenders and maintain the discipline. From this one more thing is pretty clear, that you can’t escape from these arrangements means the time you noticed a interceptor, I am sure by that time you are already locked down by the interceptor van for the high speeding and they should be ready to catch you with your photo in their systems. So be smart, and don’t try to break the rules.

Resources:

  1. Image Source – www.mybangalore.com
  2. http://www.howstuffworks.com/radar-detector1.htm
  3. http://auto.howstuffworks.com/radar-detector4.htm
  4. http://en.wikipedia.org/wiki/Radar_gun
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