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.



Open seminar with Mistra SAMS international scientific advisory...

Mistra SAMS international scientific advisory panel (ISAP) is visiting Stockholm, and the program will host an open seminar where the panel members will give talks in their area of expertise.

ERPUG 2017

The five year anniversary of  European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017. 



Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017. 


Crash testing bicycles at VTI

For the first time single bicycle crashes have been simulated at the VTI crash safety laboratory.


A case study exploring firefighters’ and municipal officials’ preparedness for electrical vehicles

A VTI-study presents a social perspective on new vehicle technology. It explores the self-reported preparedness of the fire departments (i.e., rescue services) in Sweden’s three largest cities regarding rescue operations involving electrical vehicles (EVs).


Pioneering research on and about bicycles at VTI

Under what circumstances might cyclists lose tyre grip? What actions could then be taken to prevent a crash? VTI is currently developing a theoretical model of the behaviour of bicycle tyres during braking and steering in different situations and on different...


Virtual pedestrians create efficient stations

If more people are to choose sustainable travel, then the public transport stations of the future must be designed so that pedestrians can get where they are going quickly, without congestion or queues. The Swedish Road and Transport Research Institute (VTI)...