Gated or Ungated? A Case Study on Walkability Measurement for Urban Communities

The walkability is closely related to the lifestyle and health of local residents. Unreasonable community design may result in spatially segregated spaces, creating walking barriers for residents and reducing walking accessibility. If a community’s physical layout can be optimized through better walking-related planning at the community level, people would be more convenient to reach more facilities with a better walking accessibility. A microscale measurement method for walkability at the community level is necessary to assist in community planning. This study developed a new measurement of walkability using a hexagon-based adaptive crystal growth algorithm and verified its effectiveness by examining the impact of gated communities on walkability. Taking three communities in Beijing as cases, this study created two kinds of accessibility planes (with-wall and no-wall) to compare changes in walkability between gated and open communities. The findings show that gate and wall removal can partially improve community walkability and that the algorithm can accurately measure community walkability in different scenarios. The proposed algorithm provides a new perspective for walkability measurements and offers a scientific tool for people-oriented community planning.