The main objective of this research is "Drunk Driving Detection." Nowadays, a large number of accidents are caused by drivers or those who operate automobiles. As a result, in nearly every nation on earth, drunk driving is a significant contributing factor to accidents. The goal of the Alcohol Detector in Car project is to verify the security of passengers. If a driver has consumed alcohol, the Alcohol Detection with Car Controlling project helps to keep the car under control. An alcohol breath analyzer project needs to be installed inside the vehicle. In a different instance, if the driver starts the car and is not intoxicated when doing so, the sensor will detect alcohol on their breath and the vehicle will start. An LCD display, a dc motor, and an alcohol sensor are interfaced with an Arduino uno family microcontroller to demonstrate the concept. In this instance, the microcontroller receives data from the alcohol sensor, which is used to continuously check the user's breath. In order to demonstrate engine lockup, the microcontroller stops the tiny DC motor and displays an alcohol detection note on the LCD display in response to a high alcohol signal from the alcohol sensor. The technology requires a push button in order to start the engine. The engine won't start at all if alcohol is found while starting it. The device locks the engine if alcohol is found after it has started.