Using GIS to meet accessibility requirements

摘要

San Francisco began installing wheelchair-friendly curb ramps in the early 1970s, well before the Americans with Disabilities Act (ADA) went into effect in 1991. Of the city's 28,000 street corners, two-thirds have at least one ramp. In addition to adding a ramp to intersections that don't have one, the San Francisco Department of Public Works is systematically replacing the original ramps because they don't meet federal design requirements. This monumental effort is expected to be completed by 2017 for about $1 million/year.