基于步行安全的生活圈可达性分析——以武汉市为例

Analysis of Walking Safety-Based Accessibility:A Case Study of Wuhan

在城市交通出行中,行人作为弱势群体,步行安全显得尤为重要。本研究通过街景图片识别三类步行设施,并叠加机动车流量与人口分布综合计算步行安全性。以步行安全性为道路网阻抗,计算分析了武汉市步行指数及医疗、绿地资源的可达性。结果表明:武汉市步行设施建设有待提升;步行安全存在明显的地区分异,在“两江三镇”分割的情况下,汉口地区步行设施建设总体较为良好,但尚无法负担本地区的车辆及行人需求。在基于步行安全的可达性方面,居民生活步行圈建设良好,汉口地区处于较好区域。

Pedestrians are a vulnerable group,thus,walking safety is particularly important.In the study,we identified three walking facilities through street view imagery,and then introduce vehicle traffic and population distribution to calculate walking safety.Taking walking safety as the road network impedance,the walk score and the accessibility of medical facilities and green space in Wuhan were calculated and analyzed.The results show that the construction of pedestrian facilities in Wuhan needs to be improved.Meanwhile,under the condition of"two rivers and three towns",there are obvious regional differences in pedestrian safety,the construction of pedestrian facilities in Hankou area is generally good,but it cannot afford the needs in the area.In terms of accessibility based on pedestrian safety,the residential life circle is well constructed,and the Hankou area is still in good condition.