Elise Miller-Hooks

Publications: Journal 71

“Welfare Maximization for Bus Transit Systems with Timed Transfers and Financial Constraints"

Journal of Advanced Transportation 2016, 50, 421-433
L.Chen, P. Schonfeld, E. Miller-Hooks (2015)


In serving regions with a wide range of characteristics, conventional and flexible bus services may have to be combined. If demand densities and resulting service frequencies are low, the coordination of bus arrivals at transfer stations may significantly reduce passenger transfer times. A method is proposed for integrating, coordinating and optimizing bus services while considering many-to-many travel patterns, demand elasticity, financial constraints and appropriate service type for various regions. The objective is to maximize the welfare, i.e., the sum of producer and consumer surplus. After comparing several solution methods, a real-coded genetic algorithm with bounded integer variables is selected to solve the problem, where service types, fare, headways and service zone sizes are jointly optimized. Sensitivity analyses explore how the choice among conventional and flexible buses depends on the demand, subsidy and demand elasticity parameters. The results also show how service type influences coordination decisions. Welfare increases due to coordination are found to be higher in cases with high demand, low subsidy, or when conventional services predominate.


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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