The Network Effects Of Railway Investments
Author(s)
S. Hansen, A. Landex & A. H. Kaas
Abstract
Network effects are when a change at one place in the railway network results in
changes elsewhere in the network – maybe even far away from the original
change. Railway investments have network effects, and therefore, this paper
describes the network effects and how these network effects can be examined by
queuing time. This paper gives examples of network effects and describes the
importance of the size of the analysis area and the connections between trains in
the railway network.
Keywords: network effects, queuing time, timetabling.
1 Introduction
The aim of many railway investment projects in Europe is to remove bottlenecks
in the infrastructure, thereby making it possible to reduce travel times and
increase the number of trains. The size of the benefits depends of the actual
project involved. In any case, it is an important planning task to determine the
future timetable. This makes is possible to determine the benefits for travellers in
a standard cost-benefit analysis (CBA). The scope of this paper is to discuss the
influence of the size of the analysis area on the calculated travel times.
Now, once a project is completed it is fairly straightforward to recognize that
the project will also influence the future timetable outside the project area,
thereby creating benefits outside the local area of the project. This is denoted
\“Network effects” in this paper. It is not possible to claim this as a general effect.
On a rural branch-line, where local trains connect to the national InterCity
system, it is unlikely that any project will influence the national timetable. The
benefits on the rural branch-line will be purely local, while removing a major
bottleneck on the main-line network is likely to create changes on many
Keywords
network effects, queuing time, timetabling.
Related Book
Other papers in this volume
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