Actually, when people talk about cycling in NYC, most people forget that NYC has 5 boroughs of which Manhattan is the smallest and the 4th most populated. The other four boroughs aren't quite as dense so many people who don't need to commute to Manhattan drive, although just as many if not more take buses and trains.

I'm wondering if you analyzed any other commonalities between bike commuters such as whether they're more environmentally conscious or more active in community activies, charities or politics. For example, is there a link between commuters who commute to reduce pollution and whether they care about the environment and legislation that's detrimental to the environment and thus somewhat involved in organizations and political causes that seek to improve the environment. Another example would be if they commute for their health, do they also ride in charity rides that raise money for disease research.

Since you're studying social anthropology, do you delve into the origin of the behavior governing the choice between cars, motorcycles and bicycles? Early recognition of why automobiles rose to prominence over public transportation, motorcycles and bicycles may explain current thinking regarding other modes of transportation.