The Automatic Driver's Drowsiness Alert System (ADDAS) using a PIC microcontroller is a technological solution that aims to prevent accidents caused by drowsy driving. This system uses a combination of sensors and algorithms to detect the driver's level of alertness and sends a warning when the driver is experiencing drowsiness or fatigue. The system is based on a PIC microcontroller that processes the data obtained from the sensors, which include an eyeblink sensor, a temperature sensor, a Heartbeat sensor, GSM (Global System for Mobile Communication) module and GPS (Global Positioning System). The eyeblink sensor monitors the driver's eye movements, the temperature sensor measures the driver's temperature, heartbeat sensor measures the pulse rate of driver, alcohol sensor measures alcohol intake of driver. The data is processed using an algorithm that analyses the driver's behaviour and physiological parameters to determine the level of alertness. If the driver is found to be drowsy or fatigued, the system sends a warning to alert the driver, such as an audible alarm. This system is efficient, reliable, and cost-effective, making it an ideal solution for preventing accidents caused by drowsy driving. It promotes safer roads and reduces the risk of fatalities, making it an essential tool for enhancing driver safety