Haptic technology indicates approaching cars.

John Morrell of Yale University has invented a vibrating car seat that uses the sense of touch to provide an early accident warning to drivers.

The seat is embedded with vibrating cell phone motors and gradual actuators which vibrates lightly by pushing on the driver for the whole ride. But when another vehicle comes behind or beside the car, sensors increase the vibration and pushes on that side of the driver’s back.

Morrell says that by maintaining a constant physical presence, the car seat's touch system enhances the driver's general awareness on the road, unlike visual warnings that are distracting and are activated only in the event of a problem.

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