[walshemj]

Density of population is the major factor Holland is a small densely populated flat country which helps with cycling.

[PeterisP]

Commutes are intra-city not inter-city; and the density of large cities in USA is comparable to the density of large cities everywhere.

[walshemj]

Or you cycle to station (using a folding bike) and then to the office in the city - most of us in the Uk cant afford to live in central London.