Beläggningsslitage vintern 2007/2008 på högtrafikerade vägar i Stockholmsområdet


For many years, VTI has monitored road surface wear caused by the use of studded tyres. In order to examine current road surface wear from studded tyres, studies were carried out in the Stockholm region of Sweden. The investigations began during winter 2006/2007 and were complimented with further studies during winter 2007/2008. The aim of the investigations was to study - surface wear on the high trafficked routes in and out of Stockholm; - surface wear on relatively new surface courses and on surface courses which have been exposed for up to four years of winter traffic; - the percentage of passenger cars that use stud tyres. The investigation carried out on the routes in and out of Stockholm showed that surface wear has increased in recent years. Vehicles today are causing more surface wear per km compared to a number of years ago. One reason for this is that asphalt aggregates used today are not as proportionally durable than those used previously. This, together with increased traffic volume, means that the level of surface wear (including rutting) caused by studded tyres has increased compared with the early 2000s. According to the 2007/2008 studies, the depth of rutting on the high trafficked road network, caused by studded tyre use, was 2-3.5mm. Estimates have shown that studded tyre use in the Stockholm region of Sweden (November 2007 to April 2008) was on average 53%. This is perhaps a slight reduction in usage compared to previous years.



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.



Automation and digitalisation are making rail competitive

Road transport is developing rapidly and its productivity has increased sharply. Rail transport, however, has not developed at the same rate. Automation and digitalisation are essential if rail freight in Europe is to survive.


New research is creating a driverless logistics chain

The research project Born to Drive has come up with a system that allows new cars to move, without a driver, from the production line out to the parking area prior to being transported elsewhere. The vision is to automate the entire logistics chain from...


VTI testing automation in EU project

VTI is leading a series of tests in a major EU project on automated driving. The first driving tests were carried out n a test track in Slovenia in December. The project will focus in part on acceptance among different groups in society, in part on...


Freight transportation on road and rail analysed

Freight transport accounts for a large proportion of the emissions, noise and congestion produced by road traffic. Transporting freight in larger but fewer lorries could reduce the problem. At the same time it might entail freight being diverted from more...


Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...


New research programme for more efficient travel

The Swedish National Road and Transport Research Institute (VTI) is playing an important role in a major new research programme to find radical solutions leading to fewer trips and more efficient travel, along with tools to enable better use of roads and...