Automation has created a bigger hype in the electronics. The major reason for this hype is automation provides greater advantages like accuracy, energy conversation, reliability and more over the automated systems do not require any human attention. Any one of the requirements stated above demands for the design of an automated device. The energy conversation is very important in the current scenario and should be done to a maximum extent where ever it is possible. Energy can be effectively conserved if we can control the traffic lights on the highways by glowing them according with time delay. So in this situation we should think about a system which is capable of sensing the traffic density and automatically should manage to control the traffic levels by increasing the time delay for the green signal to the roads which are with heavy traffic. The aim of the project is to solve traffic congestion, to solve the problem; we have designed a framework for a dynamic and automatic traffic light control system and developed a model with codes to help building the system on hardware. It is possible to propose dynamic time-based coordination schemes where the green signal time of the traffic lights is assigned based on the present conditions of traffic. The Raspberry Pi receives data from the PIC microcontroller, processes the data, and sends the calculated time delay back to the PIC microcontroller for control operation. In this project, when more vehicle density is identified by the IR sensors in a particular side, then green light gets ON automatically. It remains in ON state for a predefined amount of time. After the predefined amount, the signal turns to red. Also we have ambulance with RF and selection switches. Ambulance driver has to inform to the traffic signal section about his direction of arrival by selecting the switches, then RF modules at both the sections communicate and PIC Microcontroller at the traffic signal end will turn ON the green Signal of the particular direction. PIC micro controller used here is programmed by Embedded C language.        

The main objective of this project is:  

1. Automatic traffic lights control.
2. Traffic density can be known by using IR sensors.
3. Three levels to indicate Traffic density.
4. Ambulance based automatic traffic light control.
5. Using RF technology and selection switch to indicate the direction of ambulance.
6. Using PIC Microcontroller and Raspberry Pi to achieve this task.

       

The major building blocks of this project are:  

1. Regulated power supply.
2. IR Sensors
3. RF transmitter and receiver.
4. PIC (16F877A) Micro controller.
5. Raspberry pi.
6. Reset Button.
7. Crystal
8. LED indicators.

       

Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

   

Block Diagram:    

     

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