The traffic lights adorning the modern city streets are not just for illumination purposes, the modern traffic controlling systems, fitted along with these lights help in the smooth flow of the traffic, which includes pedestrians, heavy and light vehicles across the roads. A variety of control systems including computerized control systems is used to ensure the safe and smooth movement of traffic. Modern control, coordination systems are fully automated and self-adjust to prevent delay caused by road traffic.
The objective of the traffic light controller is to offer a sophisticated coordination and control over traffic, simultaneously confirming that the traffic moves safely, smoothly across the roads. The device uses LED lights for indication, a micro-controller is also used for automatically changing signals periodically. The LED lights get to turn on or off automatically.
The important cities across the world have witnessed a surplus of traffic in recent years. Unless effective steps are taken, it is difficult to manage the traffic movement. The role of the traffic signal controller plays an important role in effective traffic management. Contemporary traffic control systems are available online. These products are the integral components of any intelligent transportation system.
There are many businesses which offer their customers, a range of traffic control systems. The control systems have the following specifications:-
Some traffic signal controllers have a large TFT LCD display
An intuitive touch-screen display, graphical programming of traffic signals
The signal has High brightness, contrast display for enhanced outdoor readability
The Web browser-based user interface allows the signal controller to be remotely programmed
Many of the modern traffic control systems use the Linux based OS.
Managing road traffic (pedestrian, vehicular traffic) prevents road accidents, other road disruptions. Traffic management is important for the general public.
The traffic control systems incorporate the use of close circuit camera (CCTV), they include other means of monitoring the movement of roadway (state/local) traffic. Traffic management incorporates efficient management of the flow of traffic, providing suggestions and advice related to traffic congestion. Traffic controlling is mostly an outdoor profession. The personnel involved in the job have to stay hours outside and for them, fatigue can be an issue. Their duty is to watch the traffic, control the traffic movement.
For the common public, it is imperative to adhere to traffic safety norms to avert any accidents. By using a zebra crossing or a flyover men and women can choose to stay safe from unnecessary traffic accidents.
The traffic which is present in the current scenario is at its all time high and this is because now almost everyone is having a vehicle with them also there are a lot of people who are having more than one vehicles with them and all these things have led to a really high traffic. Therefore there is a need of maintain and controlling this traffic in a proper way so that the traffic which is present on the roads can be functioned smoothly and that is why the role of Traffic Light Controllers is very important. To maintain the smooth running of the traffic at all the places there are these traffic signals installed and some traffic signals about which we all know are controlled using these 
You must have observed that on a traffic signal, the light automatically changes its colour after a fixed period of time and also these time period are different for different locations and different traffic signals, so how is all this being managed and who is doing these changes? All these traffic signals are controlled and managed with the help of Traffic Signal Controllers. All the important things related to a traffic signal are maintained from these 
The number of vehicles on the roads has really increased by many folds in the past few decades. Everyone is now having their own vehicles with them and because of all this the traffic on the roads has increased a lot. In this case, the need of the traffic signals has really increased too. There are these traffic signals on all the major roads in order to avoid any kind of traffic and even the accidents which are caused because of this traffic. But have you ever thought that who is controlling all these traffic signals? How is making it possible, that one time the lights is green and after sometimes it becomes red. All these things are maintained with the help of a traffic controller.
Traffic Signal Controller
Since the beginning of 1990s, most of the cities belonging to both European and American countries have started replacing of incandescent types of traffic lights with few of the highly energy efficient and solid-state lighting systems or LED lights. This is because; with the passage of time, LED lights have undergone drastic improvements to become one among the powerful light sources to use as 
Most of the LED light sources used mainly as 
The traffic light has many different names like a traffic signal, stop lights, etc. They are placed out there to control the traffic. The first traffic light appeared in the mid-1800's and consisted of two lamps, a red and a green one, like it is still commonly used nowadays in most countries. They are designed specifically for use as signalling devices and are generally positioned where the road intersects with other flows of traffic, whether it is motor vehicles or human traffic, such as pedestrian crossings, a crossroads or any other locations to control the flow of traffic.
The traffic control lights which are most commonly in use consist of a set of three lights, red, amber and green. They are generally set up in a vertical position with the red light at the top, amber light in the middle and the green light at the bottom. In some countries traffic lights may be set up horizontal.
