The problem of urban traffic congestion is constantly spreading and the junctions are designed more and more which try to control the traffic but unfortunately fail in processing so. The increase in traffic is due to the growing number of vehicles and the limited expansion of roads. Our project focuses on the severe impact caused by traffic congestion on the emergency vehicle transportation system. In places such as India and Thailand where the road width and length prove to be impossible to create a separate lane for emergency vehicles, it is difficult for ambulances to navigate through the traffic. Congestion problem is a fact which contributed large impact on the transport system in country. This cause many problems especially when there are emergency cases at traffic light junctions which are always busy with so many vehicles. A congestion control system is designed in order to solve these problems. This system is designed in such a way that it should be activated when it received signal from ambulance based on radio frequency (RF) transmission and used microcontroller to make announcement and the same will be displayed on the LCD placed on the junction and will glow Green light at the junction points towards that particular route and Red light towards other Routes of that particular junction. This system will lessen accidents which often happen at the traffic light intersections because of other vehicles had to gather together for giving a special route to emergency vehicle. As the result, this project is successful and implementing the wireless communication i.e. the radio frequency (RF) transmission in the traffic light control system for emergency vehicles like ambulance. The main aim of this project is to design a system which is capable of making announcement and the same will be displayed on the LCD placed on the junction and will glow Green light at the junction points towards that particular route and Red light towards other Routes of that particular junction. We propose a system for detecting the Ambulances that are to be passed through the junctions by making an announcement before it reaches to that particular junction. The system will be Radio Frequency module based which will have the Receiver placed on the Junctions points attached with Loud speaker, LCD and Green and Red signal lights and the Transmitter will be placed on the 1km distance from that particular junction. The Transmitter will be further connected with the RF Reader which will detect the Chip placed on the Ambulance. Whenever the Ambulance comes in the 1km range of the junction, the FR Reader will detect the chip and will send wirelessly signal to the junction point using RF Module where it will make the announcement at the junction and the same will be displayed on the LCD placed on the junction and Green light will glow towards that particular route and Red light towards other routes and the traffic police will get notified by that particular announcement and Signal lights which will help in reducing traffic congestion at that particular point.