Hi Roopa,

Here is a project which matches the features of accident detection, theft detection and live tracking using IoT

In this project we can control the vehicle ON/OFF over the cloud using Internet of Things (IoT). We are using the following sensors to achieve this.

1. Ultrasonic Sensor is used to detect the obstacle in front of the vehicle. If there is any obstacle around the vehicle, the vehicle will not switch ON.
2. IR Sensor is used to ON/OFF the vehicle and also to detect if the person is wearing seat belt or helmet.
3. Vibration Sensor detects if any accident happens and the GPS module sends the exact location to the cloud. Hence we can save the person.
4. Gas Sensor is used to detect if the person consumed alcohol or smoked.

Read the entire project @IoT based Smart Vehicle Automation and Control with Enhanced Safety, Security and Traking System using Wireless Sensors Networks