赫南德兹曾造访西班牙的塞维尔，当地增设了120公里的单车专用道，而单车通勤的比率也从1%增加到7%。

Hernandez visited Seville, Spain, which added 120 kilometers of protected bike lanes and saw a jump in bike commuting from 1 percent to 7 percent.

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都维尔伯和拉里德塞的调查已撰写了大量关于这个问题的。

And both Ken Wilber and Larry Dossey have written extensively on the subject.

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