“…Therefore, interventions involving the built environment have become a promising opportunity for the promotion of walking activity among the elderly [25,26]. In a recent systematic review mainly focusing on the western context, Van Cauwenberg et al [14] concluded that the following built environment features would impact the walking activity of the elderly, albeit to varied degrees: (1) walkability, e.g., residential density, land use mix diversity, and street connectivity [27,28]; (2) access to services, e.g., access to public transportation and recreational facilities [29,30]; (3) walking facilities, e.g., sidewalks and walking trails [29]; (4) safety, e.g., presence of heavy traffic and neighborhood crime-related safety [29]; (5) esthetics, e.g., greenery and scenery [31]; and (6) urbanization, e.g., the difference between urban and rural residents [32]. In terms of transportation (or utilitarian) walking, researchers [16,33] found that neighborhoods with higher density, greater connectivity, proximity of nonresidential destinations, and more land use mix reported higher rates of transportation walking than low-density, poorly connected, and single land use neighborhood.…”