Benefits of Dipped Vertical Alignments for Rail Transit Routes
Publication: Journal of Transportation Engineering
Volume 123, Issue 1
Abstract
Dipped track profiles between rail transit stations can significantly reduce propulsive energy, braking energy, and travel times. This work quantifies their potential benefits for circumstances reflected in various values for dips, speed and acceleration limits, station spacings, and available power. A deterministic simulation model has been developed to precisely estimate train motions and performance using basic equations for kinematics, resistance, power, and braking. For a 1% dip (i.e. a vertical dip equal to 1% of station spacing) in which gradients never exceed 4%, our results show savings (compared with level tracks) exceeding 9% for propulsive energy, 15% for braking energy, and 5% for travel time between stations.
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References
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 123 • Issue 1 • January 1997
Pages: 20 - 27
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Jan 1, 1997
Published in print: Jan 1997
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