Low Cost Breath Analyzed Ignition Interlock System

In many countries, one of the primary factors for automobile related fatalities is driving under the influence of alcohol. The highest fatal accidents are due to drunken driving. There is a need to explore and implement new technologies that would help reduce drunk driving accidents and crashes. This paper focuses on the design and development of a low cost Ignition Interlock System. The system is installed in a vehicle and is connected to the ignition switch of the vehicle through an electromagnetic relay. The system consists of an alcohol sensor that detects the alcohol concentration in the breath sample of the driver, RFID (Radio-frequency Identification) tag and reader which makes sure only the driver gives the breath sample, and GSM (Global System for Mobile communications) and GPS (Global Positioning System) modules which give the exact location of the vehicle. The system measures the alcohol in a driver's body and if the alcohol content exceeds a pre-programmed level, the system locks the ignition system of the vehicle temporarily. The implementation of Ignition Interlock System reduces the consequences of drunk driving, recidivism and saves lives. Therefore, enforcement of the Ignition Interlock System for vehicles would reduce the number of deaths due to drunk driving to a large extent and bring down the number of DWI (Driving While Intoxicated) cases.