Elise Miller-Hooks

Publications: Journal 31

“Evaluation of Relocation Strategies for Emergency Medical Service Vehicles”

Transportation Research Record 2137, 63-73.
Nair, R. and E. Miller-Hooks (2009)

Pub31Managers of Emergency Medical Service (EMS) vehicles position their fleet to provide quick response to potential emergencies. Deployment strategies for positioning the fleet are typically static and do not account for variation of demand patterns over time and changes in travel times over the course of a day across the network. Network states can vary significantly, warranting redeployment to better serve the entire community. A relocation strategy that temporarily realigns the EMS fleet in response to these changes can potentially improve system performance. In this paper, we quantify the benefits of considering relocating EMS vehicles between calls. Since there are costs associated with repositioning the vehicles, trade-offs between improved coverage and cost must be considered. Relocation strategies that consider system uncertainty are compared to static deployment strategies. A real-world analysis is conducted using emergency call data from Montreal, Canada. We also present methodology to covercome practical issues in solving a real-world optimization problem. Specifically, we outline approaches to handle multiple conflicting objectives, analyze system-wide performance probabilistically, and solve large-scale integer programs.


Elise Miller-Hooks, Ph.D.
Bill & Eleanor Hazel Chair in Infrastructure Engineering

Phone: 703.993.1685
Email: miller@gmu.edu

Office: 4614 Nguyen Engineering Building

Sid and Reva Dewberry Department of Civil, Environmental and Infrastructure Engineering
George Mason University
4400 University Drive, MS 6C1
Fairfax, VA 22030


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Volgenau School of Engineering
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