Faster to wait? Development and evaluation of staged network evacuation strategies

Hayssam Sbayti, Hani Mahmassani*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Evacuations necessitated by extreme events are usually envisioned as taking place with all people evacuating simultaneously, thereby leading to premature congestion on the surface streets and excessive delays. By staggering the evacuating load onto the network, the onset of congestion may be delayed, and people evacuate faster. In this paper, we consider the problem of scheduling evacuation trips between a selected set of origin nodes and (safety) destinations, with the objective of minimizing the network clearance time for the evacuees while minimizing the disruption to the network. We propose an iterative bi-level formulation framework for solving this problem, whereby a dynamic network assignment problem is solved in the upper level to determine the time-dependent route assignments (shipments) and a dynamic loading problem is solved in the lower level to determine the corresponding route travel times. The method of successive averages is used to solve the upper level, while DYNASMART-P, a simulation-based dynamic traffic assignment model, is used to solve the lower problem. The model determines the departure time, route, and destination for each evacuee, which is aggregated to produce a time-dependent staging policy for each origin.

Original languageEnglish (US)
Title of host publicationIntelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005
Pages5055-5066
Number of pages12
StatePublished - Dec 1 2009
Event12th World Congress on Intelligent Transport Systems 2005 - San Francisco, CA, United States
Duration: Nov 6 2005Nov 10 2005

Publication series

NameIntelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005
Volume8

Other

Other12th World Congress on Intelligent Transport Systems 2005
CountryUnited States
CitySan Francisco, CA
Period11/6/0511/10/05

Keywords

  • Dynamic traffic assignment
  • Evacuation
  • Scheduling
  • Simulation
  • Staging

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Transportation
  • Automotive Engineering
  • Computer Networks and Communications
  • Artificial Intelligence
  • Computer Science Applications

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  • Cite this

    Sbayti, H., & Mahmassani, H. (2009). Faster to wait? Development and evaluation of staged network evacuation strategies. In Intelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005 (pp. 5055-5066). (Intelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005; Vol. 8).