A Review Paper on Alcohol Detection and Engine Locking System with GPS Tracking System through Mobile Application

This study aims to analyze the impact of internal factors on road accidents. The paper presents a smart vehicle safety system that integrates alcohol detection, engine locking, GPS tracking, and mobile app notifications through web APIs. The system uses an MQ-3 alcohol sensor to detect alcohol levels in the driver's breath. If the detected level exceeds a set threshold, the NodeMCU (ESP8266/ESP32) processes the data, triggers an engine lock mechanism, and uploads the vehicle's location (via GPS module) to a cloud server using a web API. A mobile application retrieves the data in real-time and displays the vehicle's location on Google Maps, while also sending push notifications. This approach eliminates the need for GSM connectivity, utilizes Wi-Fi/IoT connectivity, and offers a scalable, cost-effective road safety solution.