This project presents the design and implementation of four technologies to prevent and reduce road accidents. The first module presents the detection of driver's drowsiness through eye blink sensor and alerting the driver if eyes are closed for more than a threshold time. The second module presents alcohol detection with Engine locking for vehicles. The system monitors the alcohol presence in the vehicle surrounding and automatically turns off the engine if alcohol concentration is above a threshold level. The third module presents the concept of collision avoidance with the help of proximity sensor. If any obstacle comes in front of vehicle unnoticed by driver due to some conditions, then automatically brakes will be applied. The fourth module detects the CNG leakage in the vehicle and alerts the driver with the help of a buzzer, as well as sending message to owner. The project helps in preventing and reducing road accidents efficiently.

Keywords : Arduino UNO, DC Motor, IR sensor, MQ Sensors, Buzzer, SIM900A,.