Images: Car tech for the masses

Nissan introduced a concept system in early August to prevent people from driving while intoxicated. It includes a high-sensitivity alcohol odor sensor in the shifter that can detect alcohol levels above the legal limit in the sweat from a driver's palm (at left). If a driver is found to be drunk, the car automatically locks the transmission to prevent the person from driving. The car also has odor sensors in the driver and passenger seats (at right).

Photo by Nissan