Project Description: We usually come across drink and driving cases where drunk drivers crash their cars under the influence of alcohol causing damage to property and life. So here we propose an innovative system to eliminate such cases. Our proposed system would be constantly monitoring the driver's breath by placing it on the driver's wheel or somewhere the driver’s breath can be constantly monitored by it. So, if a driver is drunk and tries to drive the system detects alcohol presence in his/her breath and locks the engine so that the vehicle fails to start. In another case, if the driver is not drunk while he starts the vehicle and the engine is started but he/she drinks while driving the sensor still detects alcohol in his breath and stops the engine so that the car would not accelerate any further and the driver can steer it to the roadside.