REAL-TIME ALCOHOL DETECTION AND ENGINE LOCKING SYSTEM FOR THE PREVENTION OF ROAD TRAFFIC ACCIDENTS

Abstract

This project was undertaken as a final-year initiative aimed at addressing
the serious issue of accidents and damage caused by drunk driving. The system
was designed around an Arduino Uno3 microcontroller connected to an alcohol
detection sensor, which analyzes the driver’s breath. If alcohol is detected, the
vehicle’s engine is automatically shut down, and an emergency siren is activated
to warn others and prevent potential hazards. The alcohol sensor is strategically
mounted on the steering wheel so that any excessive presence of alcohol beyond a
set threshold disables the ignition system. The Arduino continuously monitors data
from the sensor and activates a locking mechanism that prevents the engine from
operating, thereby helping reduce the risk of accidents, injuries, and loss of property.
Keywords: alcohol detection, Arduino Uno, MQ3 Sensor, Engine Locking, Vehicle
safety system, Microcontroller-based control