Elise Miller-Hooks
GMU


Publications: Journal 53

“Robust Dynamic Distribution of Security Assets in Transit Systems”

Transportation Research Record 2350, 91-101.
Nair, R. J. Kumi, K. Denny and E. Miller-Hooks (2013)

Pub53A robust, mixed-integer, multi-stage program is presented that seeks to effectively secure a transit system where risk is considered to be dynamic and varies over time. A time-varying risk measure reflects the unique nature of transit systems, where accumulation of passengers at transfer facilities, stations and transit vehicles is dynamic and increases the vulnerability of the transit users and system to adverse events. The model is robust under uncertainty and better matches security assets at stations in the face of time-varying risk by redistributing them. The volume-dependent risk measure and subsequent deployment of security assets are developed for the transit system in Washington, D.C. demonstrating the variable nature of risk and response. The value of considering a robust solution is demonstrated by comparing the strategies developed from a robust approach to those from an expected value approach. Five scenarios, designed on recent events on the system, replicate the operational conditions of the transit system for the morning rush hour period and show the effectiveness of the developed deployment strategies.


 



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

Phone: 703.993.1685
Email: miller@gmu.edu

Office: 4614 Nguyen Engineering Building

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


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