What accounts for the differences in width in some stretches?
Environmental or management constraints, local designations, topographic constraints, or poor suitability of the land make it necessary for certain stretches to be narrower than 3,500 feet. Corridor segments proposed at widths wider than 3,500 feet are segments already designated as local corridor locations that are being proposed for inclusion in the proposed corridor network. In these cases, the proposed action does not propose downsizing the widths of existing corridors, but rather adopts the predesignated greater widths.