A Novel Approach to Network Criticality: Incorporating Ambient Urban Structure

Authors: Edward Helderop*, , Anthony Grubesic, Arizona State University
Topics: Transportation Geography, Geographic Information Science and Systems, Hazards and Vulnerability
Keywords: Road network, vulnerability, criticality, disaster, GIS, spatial analysis
Session Type: Paper
Day: 4/4/2019
Start / End Time: 3:05 PM / 4:45 PM
Room: Congressional B, Omni, West
Presentation File: No File Uploaded

This paper introduces a new method for critical feature identification on road networks that have been disrupted by major natural hazard events, including storm surge flooding. Specifically, many traditional methods used for network criticality identification treat systems and their elements as if they are completely isolated in geographic space, devoid of local context and divorced from their surroundings. For many networks, this is a perfectly appropriate assumption, since their interactions with the ambient environment are limited. However, for many transportation systems, including road networks, this is not the case. Road networks interact with parking lots, driveways, and many other informal features that process local interactions and impact network structure. This is especially true during and immediately after major natural disasters, where the traditional rules of the road do not apply. In this paper, we introduce a new approach for evaluating network criticality that incorporates these informal, off-network elements to the system and provide a case study of its implementation for an urbanized region along the Atlantic Coast of Florida. Implications for policy development, urban planning and emergency management are discussed.

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