The Impact of Urban Form on HSR Accessibility – A Modal Competition Approach

Authors: Yun Zhao*, University of Illinois - Springfield, Hongbo Yu, Oklahoma State University
Topics: Transportation Geography, Applied Geography
Keywords: High-speed rail, urban form, accessibility
Session Type: Poster
Day: 4/6/2019
Start / End Time: 9:55 AM / 11:35 AM
Room: Lincoln 2, Marriott, Exhibition Level
Presentation File: No File Uploaded

High-speed rail (HSR) offers intercity passenger travel services at a high speed and can serve as a competitive alternative to air and auto intercity travels. One of the main advantages of an HSR system is its capability to increase the accessibility of the connected cities by reducing travel time. Because of its strong tie with potential economic development, the improved accessibility associated with a HSR system often plays a central role in promoting HSR establishment and helping it win political and public support. However, the accessibility improvement of an HSR system is directly related to a city’s urban form. Besides its high on-board travel speed, a significant portion of HSR’s advantage is due to its often centrally located stations that lead to shorter overall access/egress time. As a city becomes more spread out, the advantage of a centrally located HSR station in reducing overall access/egress time also diminishes. There has been a lack of systematic analysis on the impact of urban form on accessibility of intercity travels via difference travel modes such as HSR. In this study, we 1) propose to use a metric, which measures the compactness of spatial distribution of population in a city, to capture the characteristic of an urban form, and 2) investigate how urban form affect the accessibility of an HSR system via a series of synthesized urban forms. A modal competition approach is also adopted to compare changes in accessibilities of HSR, air, and auto intercity travels under different urban form scenarios.

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