R202 — Alterations

R202.1 General. Alterations to pedestrian facilities shall comply with R202. R202.2 Connection to Pedestrian Circulation Path. Where pedestrian facilities are altered, they shall be connected by a pedestrian access route complying with R302 to an existing pedestrian circulation path. A transitional segment may be used in the connection. R202.3 Existing Physical Constraints. In alterations, where existing physical constraints make compliance with applicable requirements technically infeasible, compliance with these requirements is required to the maximum extent feasible. Existing physical constraints include, but are not limited to, underlying terrain, underground structures, adjacent developed facilities, drainage, or the presence of a significant natural or historic feature. R202.4 Reduction in Access Prohibited. An alteration to pedestrian facilities or elements shall not decrease the accessibility of an existing pedestrian facility or element or an accessible connection to an adjacent building or site below the requirements in these guidelines. R202.5 Alterations to Qualified Historic Facilities. Where the State Historic Preservation Officer or Advisory Council on Historic Preservation determines that compliance with an applicable requirement of these guidelines would threaten or destroy the historic significance of a qualified historic building or facility, compliance with that requirement is required to the maximum extent feasible without threatening or destroying the historic significance of the qualified historic building or facility.