[bobthepanda]

I think that walking, biking, and transit are a lot harder to cleave apart than car/non-car; many transit users also walk and bike, many cyclists also walk and take transit, etc. This is even more true once you expand this out to all trips, e.g. I take transit to work but walk to the grocery store, I take transit to work but bike to the park, etc.

So they aren't the same, but they do go hand in hand quite a lot. I don't think there's any implication in the article that they are the same.