Fujitsu is developing a sophisticated sensor system that actually detects when a driver gets drowsy or begins to fall asleep. It tracks the driver’s heart rate via the steering wheel and once it notices you are falling into a slumber it starts doing annoying things in order to wake you up. The system will roll it’s windows down, blast the stereo or even jolt the wheel. That’ll end that highway nap quick. The tech is currently unavailable in any cars as it’s still in the R&D stages.