Traffic lights play such important role in traffic management to control the traffic on the road. Situation at traffic light area is getting worse especially in the event of emergency cases. During traffic congestion, it is difficult for emergency vehicle to cross the road which involves many junctions. This situation leads to unsafe conditions which may cause accident. An Automatic Traffic Light Controller for Emergency Vehicle is designed and developed to help emergency vehicle crossing the road at traffic light junction during emergency situation. Traffic signals: This project used Arduino UNO controller to program a priority-based traffic light controller for emergency vehicle. During emergency cases, emergency vehicle like ambulance can trigger the traffic light signals to change from red to green in order to make clearance for its path automatically using RFID technology. At traffic signals when the emergency vehicle comes near to the RFID reader, it will read that vehicle tag and identify whether it is normal vehicle or emergency. If the system detects emergency vehicle, it will turn on the GREEN LIGHT to clear the path. After passing the emergency vehicle, traffic lights work in normal mode to clear the traffic conjunction. RFID tag consist of ambulance number and patient health parameters. Ambulance section: Pulse sensor, temperature sensor, ZIGBEE transceiver and LCD display which is interfaced to the Arduino UNO. Arduino uno will continuously reads the data from sensors will be displays on LCD module and upload this data into the near hospital wirelessly through Zigbee. Hospital section: Hospital section consist of ZIGBEE transceiver along with PC. HyperTerminal application is uses to monitor the ambulance number, driver phone number and patient health parameters. After checking this data doctor will accept and reject the patient from application.

The main objective of this project is:

• Automatic traffic lights control system.
• Automatic emergency vehicle (ambulance) detection using RFID.
• RFID based emergency vehicle detection and path clearance.
• Visible alerts using LCD display.
• Zigbee wireless technology for data sending and receiving.
• HyperTerminal for monitoring details.
• Sensor based patient health parameters monitoring system.

This project provides us learning’s on the following advancements:

1. Traffic Signal Working.
2. RFID Working.
3. Zigbee working.
4. Sensors working.
5. Embedded C programming.

The major building blocks of this project are:

• Power Supply Block.
• Arduino UNOs.
• RFID readers and TAGs.
• Traffic lights (red, green, yellow).
• LCD display.
• ZIGBEE transceiver module.

  Software’s used:

• Embedded C language.
• Arduino IDE studio for dumping the code into the microcontroller.
• Express SCH for Circuit design.

     

   

Regulated Power Supply:    

   

 

Block Diagram:    

     

 

 

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