1. Introduction
1.1 Streetscape accessibility
People who use a wheelchair or have a mobility impairment number more than 100,000 in New York, and yet despite their numbers, the city very often fails this group \cite{disabilities2017}. Advocacy organizations have long complained that sidewalks and street crossings pose mobility obstacles that put their members in physical danger or impede their movement. Indeed, the city has faced major lawsuits for failing to maintain the curb cuts that wheelchair users rely on. In this study, we explore the potential for urban sensing modalities to address this problem.