Angie Schmitt, 29 October 2010, StreetsBlog

At the heart of many of our discussions about sustainable transportation, when you get down to it, is the issue of justice.
Many times the injustice is plainly egregious. We see it every time a transit agency, with all the community benefits it provides, is forced to grovel for every buck, while state DOTs hand out dollars for highway expansions like they’re Chiclets. Or in the high rates of asthma that city kids suffer, in part, as a result of well-off SUV-driving commuters.
One of the under-appreciated injustices, it has always seemed to me, is that cyclists are forced to wait behind cars, breathing in poisonous exhaust, while the person creating the pollution sits inside a tin can full of filtered air (although that air also has its share of poisons).
New research shows that cycle tracks are healthier for cyclists than regular bike lanes. Photo: Bike Intelligencer