Prognosintervall för antal allvarligt skadade i vägtrafikolyckor


The number of seriously injured road users is used both as an indicator of traffic safety trends in Sweden and in more specific studies of, for example, different road user groups. A seriously injured person is defined as a person who suffers injuries that lead to permanent medical impairment of at least 1 percent. The term very seriously injured is used as a complement and is defined correspondingly but refers to injuries that lead to permanent medical impairment of at least 10 percent. In practice, the level of impairment is not known at the time of the accident, and therefore the number of seriously and very seriously injured persons are forecasted. The basis for the forecasts are Strada, the national database for road traffic accidents in Sweden, and a method developed by Folksam (a Swedish insurance company) that estimates the risk that a person’s injuries will lead to permanent medical impairment in the future. The aim of this study is to present the size of the uncertainty of the forecasts for different subpopulations such as geographical areas, roads user groups, age and gender. The uncertainty of the forecasts is illustrated as forecasting intervals. It became clear during the study that derivation of the intervals was relatively easy for the case with one injury per person but considerably more difficult when the persons had a combination of several injuries. Therefore, the width of the intervals was determined using simulation instead of theoretical calculations.



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.



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.


Steps need to be taken to increase traffic safety of automated cars

Several steps are necessary to ensure that automated and connected cars will lead to increased traffic safety – everything from ensuring that technology takes vulnerable road users into account, to new forms of driver training. This has emerged in a position...


FALCON examines challenges in the transport sector

VTI is one of several important partners in the major FALCON project*, whose purpose is to create knowledge and insight regarding the transport sector. In an initial subproject, VTI has produced a manual on transport, logistics and multimodality.


VTI joined research cooperation in China

In December 2017 VTI became a member of China-Sweden Research Centre for Traffic Safety (CTS).


Swedish German research collaboration on Electric Road Systems

The project “Swedish-German research collaboration on Electric Road Systems” (CollERS) has now officially started. The goal of the project is to increase the common knowledge around Electric Road Systems by cooperation between Germany and Sweden and to...


Electric Road Systems Conference 2018

After a successful first conference in June 2017, the Swedish research and innovation platform for electric roads is arranging the second dedicated International Conference on Electric Road Systems (ERS) June 13th and 14th 2018.