I said no such thing. Obviously incentives are important.
I'm just pointing out that incentives act on individuals making individual decisions. So to claim, as the GGP (not you) did, that public policy has nothing to do with individual decisions is simply wrong.
You say that like it's not a HUGE thing. Incentives will determine the entire transport ratios of a region.
Biking on freeways is for misfits and weirdos :)