576 / 2019-02-28 23:50:10

A Pedestrian Network Analysis Considering Crosswalk Delay: A Case Study for Elementary School Commute in Songpa-gu, Seoul

Geographic information system (GIS),Urban network Analysis,Pedestrian accesiibility,Walkshed

全体主题 > Geographic Information Systems

Long waiting times at signalized crosswalks delay pedestrians and shrink the effective walksheds around schools and transit nodes. However, previous urban network analyses have not incorporated signal delays when measuring pedestrian accessibility. We propose a pedestrian network analysis method to estimate and include signal delay time at crosswalks. We estimate the expected waiting time and crossing time at signalized crosswalks for the entire pedestrian network of Songpa borough in Seoul, Korea. The results show that when we consider signal delay while drawing walksheds around elementary schools, walkable distance decreased by 13%, walkshed area decreased by 14%, and an additional 4.25% of households fell out of walkable range from schools. These reductions were not uniform and depended on the urban development pattern around each school. Our future work is to extend the research site to the entire city of Seoul and analyze the relationship between accessibility change and urban configuration.