The principal dwelt on traffic safety in his talk.

校长没完没了地谈论交通安全问题。

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The principal dwelt on traffic safety in his talk.

校长在讲话中强调了交通安全。

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Article 57 Whoever drives a non-motor vehicle on road shall abide by the relevant provisions on traffic safety.

第五十七条驾驶非机动车在道路上行驶应当遵守有关交通安全的规定。

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U.S. prosecutors have launched a criminal investigation, while experts at the National Traffic Highway Safety Administration are on the case too.

CNN: STORY HIGHLIGHTS

"There's not a way to legislate against sleepiness, " said Bruce Hamilton, manager of research and communications at the AAA Foundation for Traffic Safety, which instead focuses on public education campaigns and issuing brochures advising on the dangers.

WSJ: Drowsy driving remains an elusive highway dilemma

The Transition Roadable Aircraft, basically a flying car, recently received clearance from the National Highway Traffic Safety Administration (NHTSA) to operate both on land and in the air.

FORBES: The Flying Car Has Arrived (Seriously)