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John Krafcik

Volvo

Usually, the biggest buzz at the North American International Auto Show surrounds a vehicle.

This year, you could argue the big buzz was about a trend: The race toward self-driving, or autonomous, vehicles.

Transportation Secretary Anthony Foxx announced that President Obama would seek $3.9 billion in the next federal budget to encourage the development of autonomous vehicles, which Foxx says show the potential to save thousands of lives.

Semi-autonomous vehicles are already on the road, with more to come.