But a study of 200 volunteers finds that one out of every 40 people apparently can operate a vehicle just fine while chatting on a phone. In simulated driving tests, anyway.

对200名志愿者进行的一项研究显示，每40人中只有一人能一边聊电话，一边自如地开车，虽然说这只是模拟驾驶。

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The second study found that drivers who are too aggressive are a major cause of traffic jams, because of their habits of driving too fast, tailgating, and frequently slamming on the brakes.

第二项研究发现争强好胜的司机是交通阻塞发生的一个诱因，因为他们习惯把车开得很快，紧跟在前一辆车的后面，从而造成频繁的急刹车。

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In one study on carpooler explanations for driving choices, the researchers noted that prior to the existence of carpool lanes commuters said carpooling was too expensive.

在一项对共用车选择的研究中，研究人员注意到，公用车道修建之前，通勤的人觉得合伙用车很贵。

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Nationwide, the INRIX study found that commuters on the road during peak driving times in the 100 largest cities took seven percent longer to reach their destinations than if traffic was moving freely.

MSN: The most traffic-jammed cities in America

The overwhelming majority of teen girls who responded to the study said that changing music on car stereos and playing loud music while driving distracted them.

CNN: Teen girls take more risks behind wheel, study finds