Computation and evaluation of scheduled waiting time for railway networks

Landex, Alex

doi:10.2495/cr100821

Cited by 2 publications

(1 citation statement)

References 7 publications

(6 reference statements)

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“…The scheduled delay is easy to keep track of throughout the timetable analysis procedure since it simply determines which train paths to accept and which to reject (see [4,5] for further discussions about scheduled delays).…”

Section: Methods For Capacity Evaluationmentioning

confidence: 99%

From single to double track: effects of alternative extension measures

Lindfeldt¹

2012

WIT Transactions on the Built Environment

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Extension of single-track lines into double-track will be an important part of future rail investments in Sweden. Most Swedish railway lines are single-track and the steady growth in demand for passenger and freight transportation calls for more capacity, which in turn imposes a need for more double-track sections.This paper points out three minor measures that can be taken on single-track lines before they are completely extended into double-tracks: additional crossing loops, extended crossing loops to enable parallel entrance, and partial doubletracks. A generic model for timetable analysis, TVEM (Timetable Variant Evaluation Model), is applied to evaluate the effect of the three measures through generation of 20,000-50,000 alternative timetables.The evaluation shows that none of the measures significantly affect the maximum capacity, i.e. the number of trains in the best timetable alternative. This indicates that the longest inter-loop distance, has to be substantially shortened through either an additional crossing loop or a partial double-track. A parallel entrance facility on a crossing loop does not affect the time distance between adjacent loops so much that it can be considered to increase maximum capacity.However, all three measures result in higher timetable flexibility, i.e. number of timetable variants for a given number of trains (capacity level). Partial doubletracks give much more timetable flexibility than additional crossing loops and parallel entrance facilities on crossing loops.It is reasonable that higher timetable flexibility imposes a higher practical, realizable capacity, since a line section that can be scheduled flexibly is less likely to constrain the overall capacity on the entire line.

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Section: Methods For Capacity Evaluationmentioning

confidence: 99%

From single to double track: effects of alternative extension measures

Lindfeldt¹

2012

WIT Transactions on the Built Environment

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Network effects in railways

Landex

2012

WIT Transactions on the Built Environment

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Railway operation is often affected by network effects as a change in one part of the network can influence other parts of the network. This influence can even be far away from where the original change was made. The network effects occur because the train routes (often) are quite long and that the railway system has a high degree of interdependencies as trains cannot cross/overtake each other everywhere in the network.First the article describes network effects in general (section 2). In section 3 the network effects for trains -and how they can be measured by queuing time is described. When the trains are affected by network effects also the passengers are affected. Therefore, section 4 describes the network effects for passengers and how they can be measured using passenger delay models. Before the concluding remarks in section 6, section 5 discusses how the operation can be improved by examining network effects in the planning process.

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Computation and evaluation of scheduled waiting time for railway networks

Cited by 2 publications

References 7 publications

From single to double track: effects of alternative extension measures

From single to double track: effects of alternative extension measures

Network effects in railways

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