Rune Karlsson


Picture of Rune Karlsson

Research results from Rune


Congestion on the tracks?

In this study, VTI examined the allocation of Swedish Transport Administration timetables 2014-2016 where we compare rail companies filed applications for train paths – as they were presented at the deadline for applications in spring for the coming...

Validation of sea transports in Samgods model

The project analyzes how well sea transports are modelled in the Swedish national freight model system Samgods. This first report comprises a short description of Version 1.1 of the model including calibration, a comparison of model results and...

Analyzing model uncertainty and economies of scale of the Swedish National Freight model...

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...

Baserunning - analyzing the sensitivity and economies of scale of the Swedish national...

The purpose of the paper is to analyze how sensitive the Swedish national freight model system Samgods is to uncertainties in its production-consumption matrices (PC-matrices). This is done by studying how sensitive outputs from one of its key...

Train scheduling

The Swedish Transport Agency (Transportstyrelsen) has commissioned VTI to assist in deepening the understanding of the way in which existing railway infrastructure can be efficiently used. The assignment also includes giving advice to the agency’s...

Effects of more stringent sulphur requirements for sea transports

In 2008 the International Maritime Organization (IMO) decided on more stringent requirements from 2015 for airborne emissions of sulphur dioxide from sea transports in the sulphur emission control areas (SECA). The European SECA comprises the Baltic...

Analysis of the effects of IMO's more stringent sulfur requirements

On behalf of the governmental agency Transport analysis VTI has analysed the consequences of the stricter sulphur regulations for marine fuel with the Swedish national freight transport model Samgods. The base scenario has been compared with, in...

Competition between land based modes and sea transports for Swedish freight transports

This project aims to investigate the competition between road and rail transports on one hand and the sea transports on the other. Shippers choose different unimodal or multimodal transport chains to carry various types of goods in, to and from...

Updated calculation of transport costs for firms in Northern Sweden

The transport grant (Transportbidrag) is designed to compensate companies in the Northern part of Sweden for the higher transport costs that are caused by a disadvantageous geographic location. A total of 44 municipalities in the counties of...

Effects of Longer Lorries and Freight Trains in an International Corridor between Sweden...

The effects of enabling the use of longer road vehicle combinations and/or longer trains in an intermodal freight corridor that extends from central Sweden to the Ruhr area in Germany are studied. Transports are designed based on the smallest...

Congestion and scarce capacity on road, railway and in public transport vehicles

The purpose of this study is to take stock of Swedish data and studies that could form the basis of the estimation of marginal costs for congestion on roads and scarcity of railway capacity. Furthermore, the development of methods to estimate and...

Effects of longer trucks and freight trains in an international corridor between Sweden...

The effects of enabling use of longer road vehicle combinations and/or longer trains in an intermodal freight corridor that extends from central Sweden to the Ruhr area in Germany are studied. For the time being the transports are designed based on...

Development of validation tool and collection of ITS-based validation data for freight...

This report deals with questions concerning validation of the Swedish national goods transportation model, Samgods. To some degree, also more general issues of validation are discussed. When developing transportation models it is essential to have...

Internalisation of external effects in European freight corridors

This project was conducted upon a request from the Swedish Agency for Transport Analysis (Trafikanalys), with a governmental assignment to annually report the rate of internalisation per mode for passenger and freight transports. In its 2013 report,...

Internalisation of External Effects in European Freight Corridors

External effects or externalities “consist of the costs and benefits felt beyond or ‘external to’ those causing the effect” (Anderson, 2006). In the case of transportation, the negative externalities (costs) can take the form of air pollution, noise...

External costs and infrastructure fees for five border crossing freight transports

Summary: For five international freight relations with origin or destination in Sweden, a total of fifteen alternative transport chains have been studied:- Case 1: Container transport from Hamburg to Eskilstuna- Case 2: Trailer transport from...

An updated analysis of transport effects of IMO's more stringent emission requirements

VTI has been commissioned by the Swedish Maritime Administration (SMA) to analyze the impact of the International Maritime Organization’s (IMO) more stringent sulfur regulations, which will enter into force in 2015 in the Sulphur Emission Control...

Survey of freight transport in Sweden

This report summarizes VTI’s contribution, assigned by Transport Analysis, to a project commissioned by the Swedish government on freight transport in Sweden. The focus of this report is to generate a knowledge base and an analysis of the present...

Effects of longer trucks and freight trains in an international corridor

The project studies the effects of enabling the use of longer road vehicle combinations and/or longer trains in an intermodal freight corridor that extends from central Sweden to the Ruhr area in Germany. For the time being the transports are...

Trade and industry perspectives on the European Commission proposal on TEN-T and...

The suggested guidelines for the proposed Trans European Network – Transport (TENT) comprise two levels: a comprehensive-network and a core network. The purpose of the networks is amongst others to offer infrastructure services that support user...

An outline for a validation database for SAMGODS

A new Swedish national goods transportation model, SAMGODS, has been developed through collaboration among Swedish transport authorities. As the model recently has begun to be applied to real world problems, the need for a validation database has...

Coastdown measurement with 60-tonne truck and trailer

By use of coastdown measurements, driving resistance parameters have been estimated for a truck with trailer (60t) and a box vehicle body. At a vehicle speed of 20 m/s, average meteorological wind conditions and a load factor of 50% the following...

Rolling resistance model, fuel consumption model and the traffic energy saving potential...

In order to evaluate traffic energy changes due to the improvement of road surface standard one need to describe:• rolling resistance at different road surface conditions• all other driving resistance• fuel consumption (Fc) as a function of driving...

Rolling resistance

MIRIAM has established a sub-project (SP), designated SP 1, to deal with measurement methods for rolling resistance and related issues. This subject forms the most fundamental basis for the MIRIAM ambition to consider rolling resistance in pavement...

Road surface influence on rolling resistance

The influence of road surface properties, such as macrotexture and unevenness, on rolling resistance and fuel consumption is an important factor to consider when deter¬mining the coating of a road surface. Results of a VTI study show that the effect...

A method for estimation of average engine fuel maps

There is a need for engine maps in order to simulate fuel consumption for road vehicles after mechanistic principles. In an engine map, fuel consumption (g/kWh or g/s) is expressed as a function of engine speed and engine torque. In general, there...