美国内华达州机动车管理部门近日向谷歌颁发了首个自动驾驶汽车牌照，以进一步检验此类车辆在实际道路驾驶中的性能。

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Department of Motor Vehicles officials said Monday they\ve issued Google the nation's first license to test self-driving cars on public streets.
Nevada drivers could soon be sharing the road with vehicles that don't need them.

Department of Motor Vehicles officials said Monday they've issued Google the nation's first license to test self-driving cars on public streets, after conducting demonstrations² on the Las Vegas Strip and in Carson City that show the car is as safe — or perhaps safer — than a human.

"It gets honked³ at more often because it's being safe," said Nevada DMV Director Bruce Breslow.

Self-driving vehicle technology works like auto⁴-pilot to guide a car — in this case a modified Prius — with little or no intervention⁵ from a human operator. Laser radar⁶ mounted on the roof and in the grill⁷ detects pedestrians⁸（行人） , cyclists and other vehicles, creating a virtual buffer⁹ zone around the obstacles that the car then avoids.

While some envision the robotic car dropping off its operator at the front of the mall and hunting for a parking spot on its own, Breslow said not so fast.

Nevada's regulations require two people in the test cars at all times. One person is behind the wheel, while the other person monitors a computer screen that shows the car's planned route and keeps tabs on roadway hazards and traffic lights.

If there's a glitch¹⁰, the human driver can override¹¹ the autonomous¹² auto with a tap on the brake or a hand on the steering¹³ wheel.

Last summer, Nevada Gov. Brian Sandoval took the car for a spin in and around the state's quiet capital city. But Las Vegas Boulevard, where costumed superheroes routinely take the crosswalks and massive billboards¹⁴ angle for the attention of starry-eyed tourists, was perhaps best suited to test the car's main purpose.

"They're designed to avoid distracted driving," Breslow said. "When you're on the Strip and there's a huge truck with a three scantily¹⁵（缺乏地） clad women on the side, the car only sees a box."

So far, Google's applied¹⁶ to license three test vehicles. Breslow said the cars will display red plates and an infinity¹⁷ symbol to represent their status as vehicles of the future.

Once they're ready for the market — something Breslow guesses could come in three to five years — the plates will be green.