Authors Y Mohan DasDepartment of Computer Science Engineering (Data Science), GATES Institute of Technology, Gooty, Andhra Pradesh, IndiaS Athiya FirdousDepartment of Computer Science Engineering (Data Science), GATES Institute of Technology, Gooty, Andhra Pradesh, India Abstract Driver drowsiness is one of the leading causes of road accidents worldwide, making the development of intelligent driver monitoring systems essential for improving road safety. This paper presents a vision-based driver drowsiness detection system using Haar Cascade classifiers and Convolutional Neural Networks (CNNs) to monitor the driver's alertness in real time. A webcam continuously captures the driver's facial features, and the Haar Cascade algorithm is employed to detect the face and eyes efficiently. The extracted eye images are then processed by a custom-designed CNN to classify the eye state as either open or closed. Based on the eye closure duration, blink frequency, yawning behavior, and head movement, the system determines the driver's level of drowsiness. When signs of fatigue exceed a predefined threshold, an audible alert is generated to warn the driver and help prevent potential accidents. The proposed approach provides a non-intrusive, real-time, and cost-effective solution with improved robustness under varying facial expressions and lighting conditions. The experimental results demonstrate that the system effectively detects driver drowsiness with high accuracy, making it suitable for integration into advanced driver assistance systems (ADAS) and intelligent transportation applications. Keywords Driver Drowsiness Detection Computer Vision Haar Cascade Classifier Convolutional Neural Network (CNN) Eye State Classification Fatigue Detection Facial Feature Detection Real-Time Monitoring Driver Monitoring System (DMS) Road Safety Deep Learning Advanced Driver Assistance Systems (ADAS). 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