Valideringsverktyg och valideringsdata till godsmodeller

Magnus Johansson
Fredrik Söderbaum
Abboud Ado
Pia Larsson-Wijk
Udin Christian Udin

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 independent data available that can be used for comparison, validation and calibration. The quality and availability of such data are obvious issues. It is a big advantage if these data cover many different aspects of the model results and are collected on a regular basis. In the report, a survey of data sources useful for validation purposes is presented. For each source of data, quality and availability is discussed. For statistical data, the method for collecting the data is described in some detail as well as uncertainties and access to the data that may be restricted due to privacy regulations. A special section in the report is devoted to investigating if present day intelligent transport systems (ITS) can provide data for validation purposes. Once the compilation of validation data is completed, many problems remain concerning the validation. In particular, there is a matching problem between the model output data and validation data. The many different table formats and aggregation levels for the data add to the complexity of this problem. A similar, but easier, problem is to compare output data from different versions of Samgods. Within the project a computer program has been developed that can be used for matching such kinds of datasets. The program, as well as a user manual for it, is included in the report.



Cost Benefit Analysis (CBA) workshop in Stockholm

An open seminar and workshop in Stockholm will be held on 25-26 April 2018. The workshop deals with the use of CBA as a basis for decision-making in the public sector. The workshop is organized by, among others, Professor Jan-Eric Nilsson, VTI.

The 6st Humanist Conference

The 6th HUMANIST Conference will take place 13-14 June 2018 in the Hague, The Netherlands. The scope of the conference covers a wide range of topics on Human Factors in Transport. Tania Willstrand and Alexander Eriksson will present their research results.



VTI will develop simulators for ambulance staff

VTI has initiated a pilot study for paramedics with the Centre for Teaching & Research in Disaster Medicine and Traumatology and Linköping University. The aim is to give ambulance staff the opportunity to practice critical medical tasks in a moving vehicle in...


Unique electrified road opens in Sweden

The world’s first electrified road recharging the batteries of cars and trucks while driving opened in Sweden. The Swedish Minister for Infrastructure, Tomas Eneroth, was at the formal inauguration of the electrified road on April 11, 2018. VTI is one of 22...


Swedish road safety spreads internationally

Sweden is a leading country in terms of road safety, and the research conducted by the Swedish National Road and Transport Research Institute (VTI) has contributed to increased safety. VTI’s remit includes disseminating research results and keeping up to date...


A greater understanding of cyclists' behaviour

Cyclists are often accused of not following traffic rules and being hooligans on the road. New research shows that there is no support for this perception. "Our observations reveal no such general anarchy" says Sonja Forward, researcher at VTI.


New technology for road surface measurement tested

VTI has tested a new scanning-laser technology for road surface measurement. The tests show the new technology for comprehensive transverse-profile measurement provides dependable values in measuring transverse profile and rut depth.


Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018

VTI’s Senior Research Leader Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018 for his work on research into tyres and road surface.