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Welde, Morten; Tveter, Eivind & Odeck, James Oyugi
(2024).
Nytte-kostnadsanalyser: Hvor usikre er resultatene?
Moderne Mobilitet og Infrastruktur.
ISSN 2704-1514.
2(1).
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Tveter, Eivind; Welde, Morten & Odeck, James Oyugi
(2024).
Usikkerhet i nytte-kostnadsanalyser.
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Tveter, Eivind; Welde, Morten & Odeck, James Oyugi
(2023).
Usikkerhet i nytte-kostnadsanalyser .
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Welde, Morten; Tveter, Eivind & Odeck, James Oyugi
(2023).
The Uncertainty of Cost-Benefit Analyses
.
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Aasness, Marie Aarestrup & Odeck, James
(2022).
Determinants of road users' experiences of congestion.
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Odeck, James; Börjesson, Maria; Hammes, Johanna Jussila; Volden, Gro Holst & Welde, Morten
(2022).
Identifying indicators for value for money in the front-end of
road projects: Using National Transport Plan data from
Norway and Sweden.
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Hammes, Johanna Jussila; Volden, Gro Holst; Welde, Morten; Börjesson, Maria & Odeck, James
(2022).
Finding transport projects with high value for money – what are the socio-geographic determinants?
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Hammes, Johanna Jussila; Volden, Gro Holst; Welde, Morten; Börjesson, Maria & Odeck, James
(2021).
Finding transport projects with high value for money: what are the socio-geographic determinants?
Working Papers, Swedish National Road & Transport Research Institute (VTI).
Show summary
We use cost-benefit data from 1052 projects in Norway and Sweden to analyse ex ante factors that can explain which characteristics of transport infrastructure projects explain high value for money. The aim is to identify characteristics that can be used in assessments of projects before a cost-benefit analysis is feasible. We find that in Norway, road toll financing is a good indicator of high value projects, especially in the poorer municipalities. In Sweden, co-financing serves to raise investment volumes, but tends to lead to worse value for money. In Sweden, congestion seems to be the biggest problem in medium-income municipalities, while there are traffic safety benefits to be obtained in the rural areas. A higher initial capacity on a link raises both benefits and costs, and costs are higher in more densely populated areas in both countries. We find diminishing economies of scale in Norway and increasing economies of scale in Sweden.
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Odeck, James & Welde, Morten
(2021).
Cost Overruns of Transportation Infrastructure Projects.
In Vickerman, Roger (Eds.),
International Encyclopedia of Transportation.
Elsevier.
ISSN 9780081026717.
p. 483–489.
doi:
10.1016/B978-0-08-102671-7.10089-2.
Show summary
What is a cost overrun of a transportation project? What problems does it cause? How should overruns be measured? How common and prevalent are overruns worldwide? What are the potential ways of avoiding overruns? These are the questions that we address in this paper, and the rationale is to provide a brief and comprehensive overview of all of these topics. We show different measures for overruns and recommend when and why they are useful. Furthermore, we rebuff earlier findings that cost overruns are more prevalent than underruns. Finally, we argue that, among several potential measures proposed in the literature to eradicate overruns, quality assurance of estimates is one of the most effective measures.
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Welde, Morten & Odeck, James
(2021).
The Robustness of Cost–Benefit Analyses.
In Vickerman, Roger (Eds.),
International Encyclopedia of Transportation.
Elsevier.
ISSN 9780081026717.
p. 249–255.
doi:
10.1016/B978-0-08-102671-7.10048-X.
Show summary
In this chapter we address the robustness of cost–benefit analysis (CBA) from the perspective of its usefulness for decision-making. After summarizing how CBAs are preformed, we provide an example of how uncertainties in its parameters may jeopardize its usefulness as a decision-making tool. We also elaborate on how the robustness of CBAs is contextual, depending on what they are expected to serve, together with the fact that CBAs are either ex-ante or ex-post. More generally, the chapter provides an overview of the inherent uncertainties in CBAs. Major sources of uncertainties in CBAs are addressed and we point out that the robustness of CBAs can be improved by performing ex-post evaluations. Additionally, the issue of the robustness of CBAs in a future perspective is addressed.
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Graae, Bente Jessen; Nielsen, Martin Reinhardt; Kløckner, Christian; Ringsby, Thor Harald; Moe, Espen & Said, Mohammed Yahya
[Show all 15 contributors for this article]
(2019).
Savanna Life (brettspill/serious game).
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Tveter, Eivind & Odeck, James
(2018).
How to implement wider economic impacts in transport appraisals? A review of the Norwegian experience.
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Welde, Morten; Tveter, Eivind & Odeck, James
(2018).
The accuracy of traffic forecasts for fixed link projects : an empirical study of Norwegian bridges and tunnels.
European Transport Conference past papers repository.
ISSN 2313-1853.
p. 1–15.
Full text in Research Archive
Show summary
This paper studies the accuracy of traffic forecasts for fixed link projects in Norway. During the last four decades, the Norwegian government has invested substantial resources in projects that have replaced ferry connections with fixed links. The direct impact for road users have been reduced travel costs, with a resulting increase in traffic. This paper investigates the short-run forecast accuracy and long-run traffic effects.
Traffic forecasts are an essential element in road project appraisals. The forecasts are used to estimate the user benefits of new schemes and to make sure that the new road will have the necessary capacity to cope with future demand. A number of studies have demonstrated that despite progress in developing more sophisticated transport models, traffic forecasts remain a major source of uncertainty in appraisal.
Forecasting the traffic effects from fixed links is challenging. While most road projects only deliver marginal time-savings - reductions in travel time of more than 15 minutes are uncommon, fixed links can have a far greater impact.
In some cases, new roads may deliver significant reductions in generalised costs and may substantially change travel patterns. Fixed link projects, i.e. bridges and tunnels to replace ferry connections, may reduce travel times across fjords and from island communities to the mainland by more than 30 minutes as well as giving round-the-clock access to national and international markets. These projects have the potential to deliver a wide range of regional impacts, such as improved market access, entry of firms, increased competition, access to a wider range of goods and services, and changes in settlement patterns. This makes forecasting more challenging than in projects were changes in travel time are more marginal.
Fixed link projects are technically demanding and requires huge investments. The planning and appraisal of new projects must therefore consider the historical performance of past projects. Even if fixed links may be considered somewhat exotic, several bridge and tunnel projects are currently being considered, planned and implemented in a number of European countries. If built, they will rank among the most iconic mega-structures in our transport system.
The paper is based on data from tunnels and bridges opened for traffic from 1970 to 2013. For 23 of the projects we have access to both forecasted and real traffic and only real traffic for a further 15. We first compare traffic forecasts for the first five years of operation with real traffic We then compare traffic in the last year of ferry operations to that on the fixed link. Finally, we examine if the traffic growth in these projects have been larger than the traffic growth on other roads. Better knowledge of these mechanisms is relevant not just to fixed link projects, but to anyone planning roads that may deliver large reductions in travel time.
The paper is based on a study completed in December 2017 and the results have not yet been presented to an international audience.
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Welde, Morten; Tveter, Eivind & Odeck, James Oyugi
(2018).
Kraftig trafikkvekst når ferjer får avløsning.
Samferdsel.
ISSN 0332-8988.
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Skjetne, Eirik; Odeck, James Oyugi; Mwakilema, William; Joseph, Michael; Díez Gutiérrez, María & Tørset, Trude
(2017).
Chapter four: Transport System.
In Fyumagwa, Robert D.; Mfunda, Iddi Mihijai; Ntalwila, Janemary & Røskaft, Eivin (Ed.),
Northern Serengeti Road Ecology.
Fagbokforlaget.
ISSN 978-82-450-2359-6.
p. 82–103.
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Welde, Morten & Odeck, James
(2017).
Trafikkprognoser i bompengeprosjekter: Bedre i Norge enn i mange andre land.
Samferdsel.
ISSN 0332-8988.
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Tveter, Eivind; Welde, Morten & Odeck, James Oyugi
(2016).
Ferjeavløsning kan påvirke bosetting positivt – spesielt nær byområder.
Samferdsel.
ISSN 0332-8988.
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Welde, Morten & Odeck, James
(2016).
God kostnadskontroll, men hyppige kostnadsøkninger i tidligfasen.
Samferdsel.
ISSN 0332-8988.
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Díez Gutiérrez, María; Tørset, Trude; Skjetne, Eirik; Odeck, James & Røskaft, Eivin
(2015).
Small scale transport modelling: the case of a road through Serengeti National Park in Tanzania.
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Odeck, James & Welde, Morten
(2015).
The Impact of External Quality Assurance on Cost Overruns of Road Projects.
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Welde, Morten; Odeck, James & Saxebøl, Geir
(2015).
The Impact of Cost Estimation Methodologies on Cost Overruns.
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Welde, Morten; Odeck, James & Saxebøl, Geir
(2015).
Cost Increases in the Front-End of Road Projects.
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Odeck, James & Sandvik, Edvard Thonstad
(2015).
Does competition improve technical efficiency of transportation services? : a DEA application in the case of Norwegian car ferry sector.
Show summary
Economic theory suggests that competition enhances efficiency by which transportation services are provided. We
test the validity of this theory using the Norwegian car ferry links whereas ferry links connect trunk road segments
by transporting cars from one road and to the other. Traditionally, the ferry link services were provided by
monopolists subsidized by the government based on long term cost norms. Currently, ferry link services are
gradually being exposed to competitive tendering (CT). We use Data Envelopment Analysis (DEA) to measure how
ferry links perform and test whether the links that have been exposed to CT perform better than others. The results
reveal that: (1) Exposure to competitive tendering enhances efficiency; (2) there are large potentials for technical
efficiency improvement in the Norwegian of about 23-33% and; (3) exogenous factors outside the control of the
ferry link management impact efficiency significantly. We urge the government to speed up competitive tendering.
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Svendsen, Hilde Johanne; Hervik, Arild & Odeck, James
(2015).
Norwegian bus transport - Does internal or external organization of public authorities affect efficiency.
Show summary
This topic addresses how to organize the processes of competitive tendering of bus transport in public sector. The
question of internal or external organization will be discussed in all Norwegian counties when the procurement
process for bus transport goes from negotiations to competitive tendering. In internal organization the competitive
tendering process is performed by a department at the county authorities, while external organization is when the
county authorities establish an external unit to take care of the competitive tendering process. The necessary data
was collected from the public transport authorities. This study was made with all Norwegian counties as
population, and Data Envelop Analysis (DEA) and 2nd stage regression was applied. Passenger kilometer was used
as main output. The number of passengers was also tested as output. Labour, capital and energy were used as input
variables. Population density, degree of competitive tendering and internal/external organization were the 2nd
stage explanatory variables. At the outset, the result tends to explain that the lower degree of competitive
tendering that is applied in a county, the more efficient is the county performing. When the variables for Density,
number of inhabitants per kilometer of public road are included, the result turns out as opposite and the model
tends to explain that higher density gives higher efficiency in the counties in question. For the main variable
Organization, the model explains that external organization is more efficient than internal organization within a 10
per cent significance level. As use of DEA is sensitive to outlayers in the population, there were made an analysis
where Oslo, the capital in Norway, and Akershus were not a part of the population. By use of this sensitivity analysis
the findings suggest that a differentiated practice between rural and urban areas could be implemented.
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Odeck, James; Sandvik, Edvard & Bråthen, Svein
(2015).
Does competition improve technical efficiency of transportation services? : a DEA application in the case of Norwegian car ferry sector
.
Show summary
Economic theory suggests that competition enhances efficiency by which transportation services are provided. We
test the validity of this theory using the Norwegian car ferry links whereas ferry links connect trunk road segments
by transporting cars from one road and to the other. Traditionally, the ferry link services were provided by
monopolists subsidized by the government based on long term cost norms. Currently, ferry link services are
gradually being exposed to competitive tendering (CT). We use Data Envelopment Analysis (DEA) to measure how
ferry links perform and test whether the links that have been exposed to CT perform better than others. The results
reveal that: (1) Exposure to competitive tendering enhances efficiency; (2) there are large potentials for technical
efficiency improvement in the Norwegian of about 23-33% and; (3) exogenous factors outside the control of the
ferry link management impact efficiency significantly. We urge the government to speed up competitive tendering.
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Bråthen, Svein; Khazraeianvafadar, Mozhgan & Odeck, James
(2015).
Airport efficiency and energy use.
Show summary
This study has evaluated the effect of energy use on the efficiency of 28 Norwegian airports by
applying the two-stage Data Envelopment Analysis for 2009 to 2013. Energy use is considered as
one of the inputs in a production function along with other factors like employment, runway length
and size of the terminal buildings. Air cargo volume, aircraft movements and the annual number of
passengers are considered as output factors. The results indicate that including energy use as input
can affect the airports' technical efficiency considerably. Moreover, significant effects of external
factors to the airport operations such as airport size, the location of the airport and age of the
terminal building are found. The scale efficiency of the airports implies that most of the
Norwegian airports are not performing at their optimal scale. This study suggests that since energy
use can affect the airport efficiency, it is recommended to be considered as one of the inputs in
measuring airport efficiency. The lack of relevant input factors in a DEA, like energy use, may be
confused with lack of efficiency.
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Welde, Morten & Odeck, James
(2014).
Cost increases in the front-end of Norwegian road projects.
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Welde, Morten & Odeck, James
(2013).
The use of cost-benefit analyses in Norway and Sweden: a comparison.
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Schøyen, Halvor & Odeck, James
(2011).
Estimating the technical efficiency of Norwegian container ports relative to other Nordic and UK ones: a data envelopment analysis.
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Merkert, Rico; Pagliari, Romano; Bråthen, Svein & Odeck, James
(2011).
The use of econometric methods for efficiency analysis of regional airports - a meta analysis.
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Chaudhry, Muhammad Omer; Bråthen, Svein & Odeck, James
(2011).
Impact of transport infrastructure on economic development : a comparative analysis.
Show summary
Investment in infrastructure especially in transport infrastructure is concidered cruical factor in the growth of countries. Recently, there have been a number of studies to explore the impact of investment in transport infrastructure on growth of countries. The main hypothesis of such studies is that the infrastructure spendings on transport is of fundamental importance in growth of economies and such investments should be sustained even in the financial crisis when governments cut their expenditures. In literature, there are many examples of studies exploring such relationship on regional and national level however, there is not much evidence of any cross country comparison dealing with the impact of transport infrastructure on growth of nations. Therefore, it is hard to generalize the results derived from one particular region or country because of diversity in the geographical, economic, social and political characteristics of countries. Furthermore, the impact of additional investment in transport infrastructure may vary among developed and developing countries. This paper has the objective of supplementing and widening transportation research on the impact of transport infrastructure on the development of nations. Furthermore, this study also analyze different methodologies being used for efficiency measurement. The performance of nations (i.e., efficiency and productivity) is estimated by parametric as well as non parametric approaches i.e. Stochastic Frontier Analysis (SFA) and Data Envelopment Analysis (DEA) to efficiency measurement. This analysis is comprised of to stages. In the first stage, efficiency of nations is calculated (by individually using both the techniques) with GDP as the output and labor and capital as inputs. While in the second stage, factors thought to influence (in) efficiency e.g. the investment in transport infrastructure, extent of economic develpoment, access to hub airport and ports and demographic characteristics (such as percentage of rural population, literacy rate etc.) are regressed on the efficiency scores attained in the first stage. The results obtained by two different techniques are then analyzed and compared. There is a possibility to extend the analysis by using the statistical techniques such as the F-test, the Mann-Whitney tests to analyze the differences on the impact of transportation investment on growth between groups of countries. This paper uses the data for 2000-2004 and is comprised of 36 developed and developing countries located in Asia, Africa and Europe. Mainly the data bases of IMF and World Bank are used to obtain the data.
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Welde, Morten & Odeck, James
(2011).
Transportplanlegging: Mangelfulle analyser, men tegn på god norsk praksis.
Samferdsel.
ISSN 0332-8988.
p. 10–11.
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Odeck, James
(2010).
Samfunnsøkonomiske analyser holder høy internasjonal standard.
Samferdsel.
ISSN 0332-8988.
p. 16–17.
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Odeck, James
(2010).
Do cost overruns of road projects improve after reorganization? Empirical evidence from Norway.
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Odeck, James; Kjerkreit, Anne & Martinsen, Jan A.
(2010).
Why benefit-cost analysis matters less and how it can be improved for decision making in the transport sector – Experiences from the Norwegian National Transport Plan 2010 -2019.
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Odeck, James
(2009).
The efficiency of road toll companies : the case of Norway.
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Tveter, Eivind; Welde, Morten & Odeck, James Oyugi
(2023).
Usikkerhet i nyttekostnadsanalyser.
Norges teknisk- naturvitenskapelige universitet.
Full text in Research Archive
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Said, Mohammed Yahya; Kifugo, Shem; Kija, Hamza; Ojwang, Gordon; Ojwala, Merceline & May, Roelof Frans
[Show all 14 contributors for this article]
(2019).
Deliverable 2.1. Quantitative modelling of land use.
AfricanBioServices.
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Næss, Petter; Volden, Gro Holst; Odeck, James & Richardson, Timothy Kevin
(2017).
Neglected and underestimated negative impacts of transport investments.
Ex Ante Academic Publisher, The Concept research program.
ISSN 978-82-93253-65-5.
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Welde, Morten; Tveter, Eivind & Odeck, James
(2017).
Trafikkprognoser og trafikkutvikling i ferjeavløsningsprosjekter.
NTNU - Norges teknisk-naturvitenskapelige universitet.
Full text in Research Archive
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Merkert, Rico; Pagliari, Romano; Odeck, James; Bråthen, Svein; Halpern, Nigel & Husdal, Jan
(2010).
Benchmarking Avinor’s efficiency ‐ a prestudy.
Møreforsking Molde.
ISSN 9788278301487.
Show summary
This report investigates ways of benchmarking Avinor’s efficiency as an airport and air traffic service
provider, up against an international sample of airports. The report recommends the following
approach for a benchmarking study:
1. An internal benchmarking study of Avinor’s airports, where one could apply a Partial
Productivity Measures (PPM) study and/or a 2‐stage Data Envelopment Analysis (DEA) study.
2. A PPM comparison between a selection of Avinor’s airports and a number of comparable
international airports.
3. A 2‐stage DEA analysis on a larger set of airports. Data from around 150 airports in Northern
Europe would be available.
We would like to recommend the third approach, however with the option to limit the study to the
first and second approach.
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Larsen, Odd I.; Odeck, James & Kjerkreit, Anne
(2008).
The economic impact of enforcing axle load regulation : the case of Zambia.
Møreforsking Molde / Statens vegvesen.
ISSN 978-82-7830-129-6.
Show summary
This study is an economic assessment of regulating and enforcing axle load control of heavy vehicles in Zambia. This enforcement is part of a wider Axle Load Control Programme to prevent premature deterioration of roads and bridges, implemented in 2004 with a time frame of fours years. Among the many objectives of the programme, a new regulation pertaining to maximum permissible axle loads and gross vehicle mass (GVM) was approved in 2007 and included in the Roads Act. Efficient enforcement of axle load regulations will have two major impacts: (1) Heavy axles (as measured by GVM) inflict an excessive cost in terms of wear and tear on the roads. They may cause additional damage to bridges and impede the safety of traffic. Thus, efficient axle load regulation will lead to a reduction in maintenance cost to the road keeper, i.e., the government. (2) On the other hand, enforcing a strict regulation will imply that excessive payload on overloaded vehicles must be transported by additional vehicles and hence increase vehicle-kilometres driven by heavy vehicles. These added vehiclekilometres will increase the cost of moving any given volume of goods for road hauliers. The costs associated with this second impact may to some extent counteract the gains associated with reduced wear and tear on roads. The economic assessment has therefore focused on these two major impacts, rather than on the total Axle Load Programme per se. The results of this study are: The enforcement of the axle load regulations will lead to savings in the cost of road maintenance for the road keeper (the Zambian government). The savings will be manifested in longer time intervals between rehabilitation of different road segments. The average annual savings are estimated to be of the order US $4-4.1 million per year. Discounted over 15 years with 6 per cent rate of interest, this amounts to a present value of US $41 million. Thus, in terms of future savings in road maintenance, the programme is profitable. However, the estimated increase in annual road haulage cost is estimated to be of the order of 12-13 million US $, i.e. about three times the savings in road maintenance. Excluding transit traffic, the added cost of road haulage is a cost to producers and consumers in Zambia. The current GVM limit of 56 tonnes is an improvement over the limit of 55 tonnes. The 12-13 million US $ represent potential savings from increasing the GVM limit even further, to the more realistic 60 tonnes. The main reason for the high increase in the cost of road haulage is the GVM regulation. The regulation effectively constrains payload per trip for heavy goods vehicles. The weight of very heavy goods vehicles generally exceeds the recently approved GVM limit of 56 tonnes before the axle load restrictions come into force. Thus, the GVM regulation by itself has a negligible impact on road wear when the axle load regulations are efficiently enforced. The newly approved maximum GVM of 56 tonnes is expensive for Zambia in terms of transport costs, although it is an improvement over the previous regulation of 55 tonnes. However, it is worth noting that the limit is set regionally by SADCC, mainly as precaution for bridges, and not by Zambia alone. Because a higher GVM limit would be less expensive, the proposal to gradually increase the limit is a move in the right direction ... (sterkt forkortet)