Using robotics, laser rangefinders, GPS and smart feedback tools, Dennis Hong is building a car for drivers who are blind. It's not a "self-driving" car, he's careful to note, but a car in which a non-sighted driver can determine speed, proximity and route - and drive independently. Talk recorded 4 March 2011.

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A blind person driving a vehicle safely and independently was thought to be an impossible task - until now.