报告披露这次事故是人为原因造成的。
The report discloses that human error was to blame for the accident.
汽车可能会更安全，这意味着交通事故的数量会下降：在美国，约94%的交通事故涉及人为失误。
The potential for safer cars means accident statistics would drop: some 94% of road accidents in the U.S. involve human error.
由于人为失误和道路上汽车数量的激增，交通事故的数量还在继续上升。
But the tide of accidents continues to rise because of human failure and an enormous increase in the number of automobiles on the road.
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