This software models the economic mechanisms behind the decline of a surface transportation network, based on the assumption that the decline phase is a spontaneous process driven by decentralized decisions of individual travelers and privatized links. The software models a degeneration process by which the weakest link is removed iteratively from the network.
This is an applet that runs in Java, and the code and data files are included in a single zipped folder. To run the package, import the files as a project into Eclipse or another java platform. Run the main class, demo.java, as an applet.
National Science Foundation
Software used in Xie, Feng and David Levinson (2008) The Weakest Link: A Model of the Decline of Surface Transportation Networks. Transportation Research part E 44 100-113. Paper available at: University of Minnesota Digital Conservancy,
Xie, Feng; Levinson, David M.
(2016). SOUND – System for Ultraconnected Network Degeneration (with code to analyze network geometrics).
Retrieved from the Data Repository for the University of Minnesota,