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Biometrics are all the rage in this security-conscious age, and now cars are getting the treatment (WO 02/08022-3). But face-recognition cameras need strong lighting, and nobody wants to be dazzled by bright lights just before driving off. The answer is to use cameras that detect invisible, infrared light, says developer TRW. Anyone entitled to drive first poses for a reference snapshot. Thereafter, an in-car computer system checks the face of whoever is in the driving seat, and won’t allow the engine to start unless there is a match. The system can also warn if a drowsy driver’s eyelids are drooping, or set up the driver’s preferences, such as seat height and wing mirror angles.