An Efficient MIP Model For Locomotive
Routing And Scheduling
Author(s)
M. Aronsson, P. Kreuger & J. Gjerdrum
Abstract
This paper presents a MIP model for a locomotive routing and scheduling problem
from the domain of freight railways. Innovative features of the model include the
use of binary variables to separate the integer and continuous parts of the problem
to maintain the flow character of the integer part of the problem. The model has
been developed with, and has found practical Green Cargo, the largest rail freight
operator in Sweden.
Keywords: vehicle routing and scheduling, rail traffic resource management.
1 Introduction
The increasing competition within the railway transportation sector requires
effective resource utilisation methods for companies such as Green Cargo, the
largest rail freight operator in Sweden.
In many countries in Europe, railroads have traditionally been state-owned
organisations with diverse interests in e.g. passenger traffic, freight traffic,
infrastructure and real estate investments. The Swedish state railway was
deregulated in all these areas around the millennium, creating separate companies
with dedicated resources. Before the deregulation, locomotives were used for
passenger traffic in the daytime and freight traffic at night. Today, locomotives are
dedicated to either cargo or passenger traffic, which has brought about utilisation
patterns such as in figure 1.
Keywords
vehicle routing and scheduling, rail traffic resource management
Related Book
Other papers in this volume
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