Traffic factor is one of the most important parameters in the structural design of pavement.

交通参数是路面结构设计中最重要的设计参数之一。

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The Federal Highway Administration concluded that the main cause was a crack that grew undetected in one of the bridge's huge chain links, but that the high volume of traffic was also a factor.

NPR: Bumper to Bumper: Predicting Traffic Flow

It's difficult to track the exact role smartphones play in traffic accidents, since many wrecks are caused by more than one factor.

CNN: Will your next car be a smartphone?

Increased traffic came with a 1.8% jump in capacity and a slightly lower load factor, at 86.4%.

FORBES: Split The Booty: American Airlines Takes International, US Airways Takes Domestic