"[1] The Americans with Disabilities Act of 1990 requires elevators for new construction and alterations in public accommodations and commercial facilities, with some exceptions.
BART has committed to increasing elevator redundancy within its system.
[4][5] Connecticut Department of Transportation policy states that at stations without redundant elevators, signage must be posted near all elevators displaying a 24-hour monitored telephone number that connects the passenger to a mobility taxi service.
[6] As part of a 2006 agreement between the Massachusetts Bay Transportation Authority (MBTA) and the Boston Center for Independent Living, MBTA has agreed to install redundant elevators at stations in their system.
Since 2003, the Washington Metro has required that all newly constructed stations must have redundant elevators.