The prototype developed by Hitachi and Honda has advantages over the other ignition interlocks. These other systems require drivers to perform the test from the driver's seat once they are already inside the vehicle.

With the Hitachi/Honda device, drivers can measure their alcohol level from anywhere and, importantly, prior to entering their vehicle, thus reducing the temptation to drive. In addition, the Hitachi/Honda device can confirm that the applied gas is human exhaled breath and can detect the level of alcohol at the same time, an enhancement over currently available devices. Advancements like these will contribute to reducing or eliminating instances of drunk driving.
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