Spatial accessibility to primary healthcare services under temporal variations of demand, supply, and traffic condition: The case study of Seoul, South Korea

Keywords: E2SFCA, Spatial accessibility, Healthcare accessibility
Session Type: Virtual Paper Abstract
Day: Sunday
Session Start / End Time: 2/27/2022 03:40 PM (Eastern Time (US & Canada)) - 2/27/2022 05:00 PM (Eastern Time (US & Canada))
Room: Virtual 40

Abstract

The two-step floating catchment area approach (2SFCA) has been improved to quantify realistic accessibility by incorporating three factors: demand, supply, and traffic condition. In place-based accessibility research, the three factors that rely on the time of day have received more attention, whereas previous studies looked at the factors separately. Given that each factor is intertwined with others, all factors should be considered at the same time. Thus, the study compares accessibility between a model with variable factors and a model with static factors to identify the influences of the three factors, using the enhanced 2SFCA (E2SFCA) method. We examine how much of the difference is driven by the three factors and which factor has a substantial local impact on the difference. The analysis employed de facto population, operating hours of primary healthcare facilities, and traffic condition of the road network in Seoul, South Korea. We calculated E2SFCA for an hour, from 9 a.m. to 5 p.m., and compared the average E2SFCA result to the static E2SFCA result. We also investigated the most influential factor on their differences using the chain substitution method. As a result of this investigation, it was shown that the differences between the two models vary by location, with traffic conditions having the most impact. We demonstrated that the three factors can represent realistic accessibility when compared to static accessibility, and we underlined the importance of three factors in place-based accessibility depending on the time.