Aggregation of people-based accessibility: estimating demand of facilities to be visited during in-transit

Keywords: People-based Accessibility, Human Mobility, CyberGIS, Space-Time Prism, Potential Path Area
Abstract Type: Paper Abstract

Abstract

People-based accessibility measures the locations a person can reach if they have additional travel time while keeping the initial origin and destination. It is an acknowledged approach to examining a person's potential path area and the possibility of accessing an infrastructure under the conditions of their existing trip. However, it faces a significant computational intensity if the methodology is applied to a metropolitan area and considers the existing trips of all residents and visitors. To address the issue, this study harnesses high-performance computing power and measures the potential path areas of the people under their daily normal mobility in the Seoul Metropolitan area. To be specific, we employed the space-time prism as a fundamental methodology and overlaid it for every single trip recorded in a day in the Seoul Metropolitan Area. In addition, we consider the time-varying speed of the road network, the dynamics in the origin-destination combination, and the counts of people. Given that the study evaluates the entire human mobility, it can be applied to analyze the location that people can easily access under their current condition and the area can be proposed to place a facility that can be visited during in-transit.