Suffolk County, New York is the largest of Long Island’s four counties and measures 86 miles in length and 26 miles in width. In 2017, Beneficial Designs partnered with Greenman-Pedersen, Inc. (GPI) to assess over 250 miles of sidewalk to determine compliance with ADA and Public Rights-of-Way Accessibility Guidelines (PROWAG). During the ambitious eight-week assessment over 81,000 data points (each representing a separate section of sidewalk) and more than 16,000 individual features were collected. Among them were more than 13,000 transition heights – each individually assessed to determine their potential for creating trip and fall hazards.