Tillståndsuppföljning av observationssträckor: lägesrapport för LTPP-projektet till och med december 2015


The objective of this project is to collect and deliver high quality road data primarily for use in the development of performance prediction models. Monitoring of the LTPP sections (100 m long) started in 1984 on commission of the Swedish Road Administration. The aim is primarily to focus on road deterioration caused by heavy traffic. The project started with a limited amount of sections but, in 2015, the number has increased to 690 sections distributed over 65 sites. All sections are included in Sweden’s national road network. The following activities are included in the monitoring programme: • Distress surveys. Annual surveys are carried out by walking over the sections. During the survey all distresses and surface defects are recorded. The grading of the distresses and defects are based on a national distress manual. • Calculation of an annual crack index. The index is calculated from the type of crack, crack distress grade and crack propagation and is included, in table form, in the database. • Road surface monitoring. Financial restrictions limit the monitoring to every second year. However, rut development and longitudinal unevenness follow a relatively linear trend, so monitoring every second year is considered acceptable in this case. • Measurement of the bearing capacity (KUAB-FWD). The capacity is measured on all new sections and after any maintenance measures. • Cross section profiling is no longer carried out. • Collection of climate data from SMHIs automatic weather observation stations. • Collection of traffic data normally every fourth year. • Quality control check of all collected data before being entered into the LTPP-2015 data base.



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.