Prognosmetoder för spårdjup och IRI: vägytedata 1997–2016


This report presents a proposal for a prediction method for future values of rut depth and IRI on the paved state road network and various measures of forecast exactness. The method can also be used to fill in missing values backward in time.

An earlier VTI report within the same area concluded that a prediction method should use only data about the development locally and based its prediction on data from the current pavement cycle only. A major difference here is that the method has been expanded to include data from previous pavement cycles in the prediction method, with presentation of the advantages and disadvantages that this entails. Other parts, e.g. how data is prepared, has not been changed in any great extent.

The results are mainly that forecasts do not generally become clearly better, nor clearly worse, by including data from previous pavement cycles. There is nevertheless an advantage in including these data because that makes prediction based on local conditions possible for more sections.



ICTTP 2020

ICTTP, International Conference on Traffic and Transport Psychology, is postponed until August 2021.

Society for Benefit-Cost Analysis: European Conference 2020

VTI and Centre for Transport Studies (CTS) at Royal Institute of Technology (KTH) organise Society for Benefit-Cost Analysis: European Conference 2020. 

International Cycling Safety Conference

Swedish Cycling Research Centre, Cykelcentrum, organises together with Lund University the International Cycling Safety Conference, ICSC, in Lund 4-6 November 2020.



Unique knowledge compilation on microplastics from road traffic

Although we know that tyre and road surface wear generates significant emissions of microplastic particles, knowledge about them is very limited. This is the conclusion of a report issued by the Swedish National Road and Transport Research Institute (VTI).


Measures for infrastructure climate adaptation requires prioritisation

The effect of climate change will result in more extreme weather events causing for example increased risk of floods, and landslides, which will result in great costs to society. Therefore, society needs to prepare for the consequences brought on by climate...


Increased interest in train simulators

VTI has developed a train simulator that has become a valued tool in train driver education and research on how simulators can be used to improve railway technology.


Self-driving Buses in Linköping Part of the EU Project SHOW

The benefits of self-driving vehicles for people with disabilities are one of the focus area for a recently launched EU project linked to self-driving buses in Linköping, Sweden.


Young people's travel habits are important for the transition of the transport system

The transport system is facing a number of challenges due to its negative impact in areas such as the climate, equality and fairness. In a recent report, researchers highlight the voices of young people to get their thoughts on the field of transport.


Connected vehicles solve parking problems

Vehicles circulating in the city centre in search of a free parking space is a growing problem. A cloud service that tracks the traffic situation and the availability of free parking spaces could reduce both traffic and congestion.