LOOK, NO HANDS: Benedicte Bougler blocks the sunlight on a bus that can steer itself without the driver. It was one of many technological advances on display in San Francisco. (Robert Durell / LAT)
TIRED? Robert Chapman of Sleep Diagnostics wears glasses designed to detect sleepiness, then trigger a loud beep and a prerecorded womans voice saying, You are too drowsy to drive safely! (Robert Durell / LAT)
WATCH OUT: A BMW filled with conventioneers slides through a skid area in San Francisco, sending a message to a trailing car, where a warning flashes on a display screen. (Robert Durrell / LAT)
Dashboard of BMW driven through a skid area designed to show how it warns other cars not to follow too closely during dangerous situations. (Robert Durell / LAT)
