driverless vehicle

They take their driverless car to an appointment and set the empty vehicle to circle the building to avoid paying for parking ．

他们带着无人驾驶的汽车去赴约,让空车绕着大楼转,以免付停车费。

The Defense Advanced Research Projects Agency ( DARPA) has been supporting research into autonomous vehicles since the 1980s and sponsors a driverless vehicle competition, called the DARPA grand challenge.

另外从80年代起，美国国防先进技术研究计划署（DARPA）就开始支持自动驾驶汽车的研究，还赞助了一个无人驾驶车辆的竞赛，称作“无人驾驶机器人挑战赛”（DARPA Grand Challenge）。

The laser system mounted on top of the driverless car sensed that a vehicle coming the other direction was approaching the red light at higher-than-safe speeds.

当时，车流量属中等。安装在那辆无人驾驶车顶部的激光系统检测到，反方向的一辆车正在以高于安全水平的车速朝着红灯开来。