Long-term planning for ring-radial urban rail transit networks
Authored by Saeid Saidi, S C Wirasinghe, Lina Kattan
Date Published: 2016
DOI: 10.1016/j.trb.2016.01.017
Sponsors:
National Science and Engineering Research Council of Canada (NSERC)
Alberta Motor Association
Calgary Transit
Killam Trusts
Urban Alliance
Platforms:
Mathematica
MATLAB
Model Documentation:
Other Narrative
Mathematical description
Model Code URLs:
Model code not found
Abstract
Extensive work exists on regular rail network planning. However, few
studies exist on the planning and design of ring-radial rail transit
systems. With more ring transit lines being planned and built in Asia, Europe and the America's, a detailed study on ring transit lines is
timely. An analytical model to find the optimal number of radial lines
in a city for any demand distribution is first introduced. Secondly, passenger route choice for different rail networks is analyzed, for a
many-to-many Origin-Destination (OD) demand distribution, based on a
total travel time cost per passenger basis. The routes considered are:
(1) radial lines only; (2) ring line only or radial lines and ring line
combined; or (3) direct access to a destination without using the rail
system. Mathematica and Matlab are used to code the route choice model.
A cost-benefit optimization model to identify the feasibility and
optimality of a ring line is proposed. Unlike simulations and
agent-based models, this model is shown to be easily transferable to
many ring-radial transit networks. The City of Calgary is used as an
example to illustrate the applicability of each model. The existing
urban rail network and trip distribution are major influencing factors
in judging the feasibility and optimal location of the ring line. This
study shows the potential net benefit of introducing a ring line by
assessing changes in passengers' costs. The changes in passenger cost
parameters, such as ride cost and access cost, are shown to greatly
influence the feasibility of a ring line. (C) 2016 Elsevier Ltd. All
rights reserved.
Tags
Design
Travel demand
patterns
Location
corridor
Routes
Assignment model
Monocentric city
Circular city
Bus
system