The Aim Of Our Research Paper Is To Represent Our Project Which Makes Human Driving Safer And To Overcome Accidents. This Project Is Developed By Integrating Alcohol Sensor With Arduino Board. Arduino Processor ATmega328 Is Able To Handle More Functions Than Conventional Microcontrollers. The Alcohol Sensor Used In This Project Is MQ3 Which To Detect The Alcohol Content In Human Breath. Since Sensor Has Fine Sensitivity Range Around 2 Meters, It Can Suit To Any Vehicle And Can Easily Be Hidden From The Suspects. This Project Is Fitted Inside The Vehicle. The Project Is Designed For The Safety Of People Sitting Inside The Vehicle.