Capacity Constrained Routing algorithms for evacuation planning: A summary of results

Qingsong Lu, Betsy George, Shashi Shekhar

Research output: Contribution to journalConference articlepeer-review

191 Scopus citations


Evacuation planning is critical for numerous important applications, e.g. disaster emergency management and homeland defense preparation. Efficient tools are needed to produce evacuation plans that identify routes and schedules to evacuate affected populations to safety in the event of natural disasters or terrorist attacks. The existing linear programming approach uses time-expanded networks to compute the optimal evacuation plan and requires a user-provided upper bound on evacuation time. It suffers from high computational cost and may not scale up to large transportation networks in urban scenarios. In this paper we present a heuristic algorithm, namely Capacity Constrained Route Planner(CCRP), which produces sub-optimal solution for the evacuation planning problem. CCRP models capacity as a time series and uses a capacity constrained routing approach to incorporate route capacity constraints. It addresses the limitations of linear programming approach by using only the original evacuation network and it does not require prior knowledge of evacuation time. Performance evaluation on various network configurations shows that the CCRP algorithm produces high quality solutions, and significantly reduces the computational cost compared to linear programming approach that produces optimal solutions. CCRP is also scalable to the number of evacuees and the size of the network.

Original languageEnglish (US)
Pages (from-to)291-307
Number of pages17
JournalLecture Notes in Computer Science
StatePublished - 2005
Event9th International Symposium on Spatial and Temporal Databases, SSTD 2005 - Angra dos Reis, Brazil
Duration: Aug 22 2005Aug 24 2005


  • Evacuation planning
  • Routing and scheduling
  • Transportation network


Dive into the research topics of 'Capacity Constrained Routing algorithms for evacuation planning: A summary of results'. Together they form a unique fingerprint.

Cite this