“…(Pivo and Fisher 2011, 186) Similarly Lo's (2009, 163) paper exploring the issue of walkability concludes by partially defining it in terms of measures, specifically in terms of "factors that appear in a number of different walkability measures or metric[s]…" including sidewalk presence and maintenance, universal access, directness and connectivity, safety (at grade crossings, traffic, buffering), land use, landscaping, aesthetics, and security (perceived and actual crime). Leinberger and Alfonzo (2012) use the observational tool, the Irvine Minnesota Inventory, to propose a related list dealing with aesthetics, connectivity, density, form, pedestrian amenities, personal safety, recreational facilities, land uses, public spaces, and traffic measures (Leinberger and Alfonzo 2012, 6; also Boarnet et al 2006;Day et al 2006;Leinberger 2012). Some measures rely on perceptions.…”