Chicago DUI lawyer comments on Toyota's anti-drunk driving prototype

This Chicago DUI lawyer has posted here, here, and here about ignition interlock devices. Now Toyota announces that it has moved forward on a prototype.

August 31, Tokyo, Japan

Toyota Motor said Monday it was developing anti-drunk driving equipment that would lock the ignition of a vehicle if high levels of alcohol are detected in the driver.

The system features a hand-held breathalyser, equipped with a digital camera, that detects alcohol consumption and photographs the driver's face for identification, a company statement said.

If the driver tests positive, the system either warns him or her, or locks the vehicle's ignition depending on the level of alcohol detected, Toyota said.

The carmaker is conducting tests with affiliate truck maker Hino Motors, and will install the equipment in selected trucks and other vehicles of fleet customers that include companies and government organisations.

The device will alert fleet administrators if the driver is detected with excessive alcohol levels, Toyota said.

Do you think this is because their primary concern is avoiding accidents? I wonder if you will be able to sleep it off in the car if the device has locked the vehicle?