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Analyzing model unc...
Analyzing model uncertainty and economies of scale of the Swedish National Freight model to changes in transport demand
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- Westin, Jonas (författare)
- Umeå universitet,KTH,Skolan för arkitektur och samhällsbyggnad (ABE),Centre for Regional Science, Umeå University, Umeå, Sweden; Royal Institute of Technology (KTH ), Centre for Transport Studies, Royal Institute of Technology (KTH ), Stockholm, Sweden; Umeå University, Umeå, Sweden,Centrum för regionalvetenskap (CERUM)
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- Vierth, Inge, 1959- (författare)
- Statens väg- och transportforskningsinstitut,Transportekonomi, TEK,Swedish National Road and Transport Research Institute (VTI)
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- de Jong, G. (författare)
- Centre for Transport Studies, Gothenburg, Sweden; Significance, The Hague, Netherlands; Inst Transport Studies, University Leeds, Leeds, England,Significance, Koninginnegracht 23, The Hague, Netherlands; Institute for Transport Studies, University of Leeds, United Kingdom; CTS, Sweden,Significance, Institute for Transport Studies, University of Leeds, and CTS, Sweden
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- Karlsson, Rune (författare)
- Statens väg- och transportforskningsinstitut,Trafikanalys och logistik, TAL,Swedish National Road and Transport Research Institute (VTI)
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- Krüger, Niclas A., 1975- (författare)
- Örebro universitet,Handelshögskolan vid Örebro Universitet,Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden,School of Business, Örebro University and VTI, Fakultetsgatan 1, Örebro, Sweden
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- Johansson, M. (författare)
- Centre for Transport Studies, Gothenburg, Sweden; Transport Analysis Sweden, Stockholm, Sweden,Transport Analysis and Sweden and CTS, Sweden,Trafikanalys
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(creator_code:org_t)
- Editorial Board EJTIR, 2016
- 2016
- Engelska.
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Ingår i: European Journal of Transport and Infrastructure Research. - : Editorial Board EJTIR. - 1567-7133 .- 1567-7141. ; 16:4, s. 619-632
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Abstract
Ämnesord
Stäng
- The purpose of the paper is to analyze model uncertainty and economies of scale of the Swedish national freight transport model system Samgods to changes in its zone-to-zone base matrices. Even though economies of scale is important for freight transport, few studies analyze model uncertainty and economies of scale at a national level. Compared to many large scale network-based freight models working on aggregated transport flows, an important feature in Samgods is that it simulates logistics behavior at a disaggregated firm level. The paper studies effects on total tonne- and vehicle-kilometre, modal split, consolidation and logistics costs when the base matrices are scaled up and down and estimates economies of scale for Swedish freight transports. The results indicate that the logistics model can find new logistics solutions for larger demand volumes, mainly by shifting freight to sea transport. If transport volume increases with one percent, average logistics cost per tonne is reduced by around 0.5 percent. Part of the cost reduction comes from increased consolidation of shipments due to larger transport volumes. The results derived in the paper can serve as a reference for empirical validation and comparisons with other large scale freight models. The paper is a first contribution that tries to fill the knowledge gap on the impact of base matrices on transport model outcomes, such as economies of scale, in the context of a full-fledged real-world freight transport model.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Transportteknik och logistik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Transport Systems and Logistics (hsv//eng)
- SAMHÄLLSVETENSKAP -- Ekonomi och näringsliv -- Nationalekonomi (hsv//swe)
- SOCIAL SCIENCES -- Economics and Business -- Economics (hsv//eng)
Nyckelord
- Base matrices
- Economies of scale
- Large scale freight model
- Model uncertainty
- Sensitivity
- Cost benefit analysis
- Cost reduction
- Costs
- Crashworthiness
- Economics
- Uncertainty analysis
- Empirical validation
- Important features
- Large-scale network
- Logistics solution
- Model uncertainties
- Transport modeling
- Freight transportation
- 12 Road: Freight transport
- nationalekonomi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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