Sure we do.  Those places and things you mentioned have been put to actual use.  The elevated rail supports have not.  I can't think of a better way for voters (at least those living on the ewa side) to be reminded how important the decision to elect a political candidate can be.

The elevated supports may be an eyesore, but perhaps that's what's required to get citizens off their complacent duffs - for years and years into the future.