Yet driving in complex urban settings with multi-lane traffic, frequent stops and turns and unexpected obstacles is exactly what DARPA hopes that autonomous vehicles will be able to do some day.

然而，在布有多车道交通线的环境复杂的市内中驾驶时，经常性的停车、转弯以及无法预期的障碍，正是DARPA希望有一天自主性车辆有能力去应付的情况。

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When choosing a location for your walking meditation practice, be aware of any possible safety concerns such as tripping hazards, obstacles or traffic.

当你在选择行走默想的地点时，要注意到任何可能的安全隐患，诸如绊倒的危险，障碍物和车流、人流。

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Autonomous intelligent cruise control systems use forward looking radar sensors to collect information about traffic and obstacles in the roadway ahead.

自主智能巡航控制系统利用前视雷达传感器收集前方道路上交通和障碍物的信息。

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DARPA, after all, is the ultra-forward-thinking Pentagon agency that hosted the Grand Challenge in 2006 and 2007, an autonomous car race across the Mojave desert, as well as the Urban Challenge, a 2008 event that challenged self-driving cars to negotiate a cityscape complete with obstacles and traffic.

FORBES: Connect

It also allows it to tip off users to traffic jams, road construction and other obstacles.

FORBES: A Crowd-Sourced Navigation Service

It has always baffled me that councils feel that they should put obstacles on roads which were created for the specific purpose of conveying traffic.

BBC: NEWS | UK | Scotland | Campaign to end speed bump 'pain'