A Smart Vehicle Safety Framework for Real-Time Driver Sobriety Monitoring and Engine Restriction
DOI:
https://doi.org/10.15662/IJEETR.2026.0802372Keywords:
This project is centered on developing an alcohol detection system aimed at reducing incidents of drunk driving. It uses an MQ-3 alcohol sensor along with a microcontroller-based engine control mechanism to identify alcohol present in the driver’s breath. When the detected alcohol level goes beyond the permitted limit, the system prevents the engine from starting, thereby enhancing vehicle safetyAbstract
Drunk driving is one of the major reasons for road accidents, injuries, and deaths worldwide. When a person consumes alcohol, it affects their thinking ability, reaction speed, and body coordination. As a result, the driver may lose control over the vehicle, increasing the chances of collisions. Even with strict rules and awareness programs, drunk driving continues to be a serious problem. Therefore, there is a need for an effective system that can actively prevent such incidents and improve overall road safety.
To overcome this issue, an intelligent alcohol detection–based engine locking system is proposed. The main objective of this system is to stop a vehicle from being operated if the driver is under the influence of alcohol. The system is designed to detect alcohol levels in the driver’s breath either before starting the vehicle or during operation, ensuring continuous safety monitoring.
The system works by integrating an alcohol sensor, a microcontroller, and an engine control unit. When the driver tries to start the vehicle, the sensor checks the alcohol concentration in the surrounding breath. If the detected value is higher than the predefined safe limit, the sensor sends a signal to the microcontroller. The microcontroller then processes this information and activates a mechanism that disables the ignition system, preventing the engine from starting. At the same time, a warning alert such as a buzzer or indicator informs the driver about the detected alcohol level.
This intelligent safety system plays an important role in reducing accidents caused by drunk driving. By ensuring that intoxicated individuals cannot operate a vehicle, it improves safety for both drivers and the public. The system is designed to be simple, reliable, and cost-effective, making it suitable for integration into modern vehicles. Overall, it contributes to safer roads and promotes responsible driving behavior.
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