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Barely 3 percent of the American work force bikes or walks to work with any frequency, despite the obvious virtues: decreased risks for obesity and diabetes, environmental benefits and lower transportation costs. Ask people why they eschew what’s known as active commuting, as many surveys have, and the primary reason cited is time. Those things take too long, most say. 在美国，只有3%的人骑自行车或步行上班（频率各不相同），这样做有明显的优点：能降低肥胖和糖尿病的风险，有益于环境，降低交通成本。然而很多调查发现，当被问及为什么不选择这些所谓的“活跃通勤”方式时，人们提到的主要因素是时间。大多数人表示，这两种交通方式耗时太长。 They’re probably wrong. A new study published in a journal called Transportmetrica A: Transport Science shows that people often overestimate the time required to commute actively, a miscalculation especially common when someone has secured a parking permit near the office. 他们很可能错了。一项发表在《运输计量A：运输科学》期刊(Transportmetrica A: Transport Science)上的新研究表明，人们往往高估了活跃通勤所需的时间，在办公室附近拥有停车许可证的人尤其会做出错误估计。 | 
