I agree, it's not easy to justify. "Would you like to breathe some unfiltered exhaust on the side of the road, completely unprotected from the heavy vehicles t

I agree, it's not easy to justify. "Would you like to breathe some unfiltered exhaust on the side of the road, completely unprotected from the heavy vehicles that pass by at high speeds? Bicycling! Health benefits!" But seriously, if there is no infrastructure, its quite hard to sell something that depends on it.