Transportforum 2012-01-12 Session 42: More efficient freight transportation through longer trainsTransportation capacity a...
Transportforum 2012-01-12 Session 42: Effektivare godstransporter genom längre tågTransportkapacitet såväl som effektivite...
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Session 42 Hans Boysen

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Transportation capacity as well as efficiency can be raised significantly by operating longer trains, even with existing technology.
For freight train operators a large portion of the cost is fixed per train or increases less than proportionally to increase train size. Power ratings per locomotive are higher for the modern locomotives that are procured now. Several dominating commodities, including intermodal and forest products, are comparatively light per meter train length, necessitating train lengths of more than 800 m to fully utilize the locomotive performance, even for a single locomotive. Longer freight trains than the 630 m cleared today can therefore raise the transportation capacity of the railway system as well as the train operators’ revenues. Longer trains can also give better coordination with connecting links, across Öresund as well as to Germany.
Practical limitations consist of locomotive performance, gradients and electrical power feeding, braking performance and length of terminals, yards and sidings. Several important freight yards, such as Malmö and Hallsberg, already have tracks up to 877 m and 890 m long. In the near term longer freight trains can be introduced and train conflicts minimized at night on double track lines in southern Sweden and by directional operation of parallel lines in northern Sweden, even before sidings are extended.
Needs, propulsion performance, braking performance and infrastructure limitations are described.

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Session 42 Hans Boysen

  1. 1. Transportforum 2012-01-12 Session 42: More efficient freight transportation through longer trainsTransportation capacity as well as efficiency can be raised significantly by operating longer trains, evenwith existing technology.For freight train operators a large portion of the cost is fixed per train or increases less thanproportionally to increase train size. Power ratings per locomotive are higher for the modernlocomotives that are procured now. Several dominating commodities, including intermodal and forestproducts, are comparatively light per meter train length, necessitating train lengths of more than 800 mto fully utilize the locomotive performance, even for a single locomotive. Longer freight trains than the630 m cleared today can therefore raise the transportation capacity of the railway system as well as thetrain operators’ revenues. Longer trains can also give better coordination with connecting links, acrossÖresund as well as to Germany.Practical limitations consist of locomotive performance, gradients and electrical power feeding, brakingperformance and length of terminals, yards and sidings. Several important freight yards, such as Malmöand Hallsberg, already have tracks up to 877 m and 890 m long. In the near term longer freight trainscan be introduced and train conflicts minimized at night on double track lines in southern Sweden and bydirectional operation of parallel lines in northern Sweden, even before sidings are extended.Needs, propulsion performance, braking performance and infrastructure limitations are described.END 1
  2. 2. Transportforum 2012-01-12 Session 42: Effektivare godstransporter genom längre tågTransportkapacitet såväl som effektivitet kan höjas betydligt genom att köra längre tåg, även medbefintlig teknik.För godstågsoperatörer är en stor del av kostnaderna fasta per tåg eller ökar mindre än proportionelltmed en ökning av tågstorlek. Effektprestanda per lok är högre för de moderna lok som nyanskaffas.Flera dominerande godsslag, däribland kombi och skogsprodukter, är dock jämförelsevis lätta per metertåglängd, vilket gör att tåglängder större än 800 m behövs för att utnyttja lokens prestanda till fullo, ävenför ensamt lok. Längre godståg än de 630 m som är klarerade idag kan därför öka bådejärnvägssystemets transportkapacitet och operatörernas intäkter. Längre tåg kan också ge bättresamordning med anslutande länkar, både över Öresund och till Tyskland.Praktiska begränsningar utgörs av lokprestanda, lutningar och elektrisk effektmatning, bromsprestandasamt hinderfri längd hos terminaler, bangårdar och mötesspår. Flera viktiga godsbangårdar, såsomMalmö och Hallsberg, har redan spårlängder upp till 877 m och 890 m. På kort sikt kan längre godståginföras och tågkonflikter minimeras nattetid på dubbelspåriga banor i södra Sverige och genom partiellenkelriktning av parallella stråk i norra Sverige, även innan mötesspår förlängts.Behov, traktionsprestanda, bromsprestanda och infrastrukturens begränsningar beskrivs.SLUT 2

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