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Effekter av att omleda höghastighetståg: En fallstudie på Ostlänken
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Transport Planning, Economics and Engineering.
2015 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

To hear of train disruptions on the news has been more a rule than an exception in recent years,

whether it is signal failure or torn down contact lines, all these disturbances have caused enormous

problems both for passengers and goods. A big reason that disruptions have such a big impact on the

railway system is that there are very limited opportunities to divert trains. However, this may change

with the future high-speed network in Sweden, where the first stage is the Eastern Link, a new

double track railway between Järna - Linköping for speeds up to 320 km / h. Thus, there will be two

double-track railways on the route and moreover the single-tracked Nyköping line, which will open

up entirely new opportunities to reroute high-speed trains from the Eastern Link when future failures


The purpose of this work is to see what effects the rerouting of high-speed train has on other trains

as well as on the rerouted trains. To see these effects a case study is being carried out on the Eastern

Link with an unplanned shutdown between Norrköping - Nyköping, where high-speed trains will be

diverted in four different scenarios. The goal of the study is to find the best alternative route for the

Eastern Link trains in terms of travel time, impact on the other traffic and the number of stations

served. Finally, a general model is developed to estimate the total diversion time for high-speed


As the Eastern Link is scheduled to be completed in 15 years, other countries like Italy and France

that already had a large high-speed network are looked into on the rerouting possibilities they have.

A common thing for both countries is that they have built many connection points between the

ordinary and high-speed network which provides great opportunities for the rerouting of high-speed


The case study is being done with the simulation software RailSys where the four study options and

the comparing alternative are simulated. The simulation takes place in the area of Södertälje -

Hallsberg - Linköping - Nyköping. In order to get a realistic picture of how the traffic can come to look

at the opening of The Eastern Link, year 2030, both forecasts and current timetables (T15) are used.

The use of T15 is being motivated that no travel time reductions will be made on the relevant

courses and that the Western and Southern main line are already heavily loaded.

The result indicates that the diversion of high-speed rail has a very marginal impact on other traffic,

this is explained by the fact they can keep the track speed limit. In an unplanned shutdown between

Norrköping-Nyköping study option 3 (UA3) is recommended, this option uses both the Southern

Main Line and the Nyköping line. The developed model shows that there is potential to calculate the

total diversion time and thus better able to predict arrival times for the rerouted trains.

Place, publisher, year, edition, pages
TSC-MT, 15-003
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-191157OAI: diva2:955152
Available from: 2016-08-24 Created: 2016-08-24

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