[LorenPechtel]

Yup. Mandating the inclusion of such features in new construction should be required. Retrofitting is another matter that very well might involve pretty much tearing down structures and most certainly shouldn't be required.

(And note that in some cases "new" construction must work with existing constraints. I'm thinking of a sign I saw in Carlsbad Cavern saying no wheelchairs past this point. The loop that was denied wheelchairs contained a pinch point a wheelchair couldn't go through. Man made the path, nature put the rocks there.)