Traffic congestion has become a major problem in urban areas, leading to delays, fuel wastage, and increased pollution. This project presents an Automatic Traffic Signal Control System with Ambulance Priority using a PIC microcontroller. The system uses IR sensors to detect vehicle density on each road and automatically adjusts the green signal duration based on traffic conditions. To provide emergency vehicle priority, an RF transmitter and receiver are used. The ambulance driver selects the direction of travel using RF switches, and the traffic signal controller receives the information to immediately turn the corresponding signal green, allowing the ambulance to pass without delay. The PIC microcontroller is programmed using Embedded C to control traffic signals efficiently. The proposed system is cost-effective, reliable, and energy-efficient, providing better traffic management while ensuring quick passage for emergency vehicles.      

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 to achieve this task.

      The major building blocks of this project are:  

1. Regulated power supply.
2. IR Sensor
3. RF transmitter and receiver.
4. Micro controller.
5. Reset.
6. Crystal
7. 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.

      Regulated Power Supply:

           

Block Diagram:

   

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