Energisnåla beläggningar: uppföljning av riksväg 95 objekt Varuträsk − Boliden


In this project the functional properties are evaluated for two different sections along highway 95 between Varuträsk and Boliden in Västerbotten county. Both sections are approximately 100 m long and constructed in the same way, except for the base layer. The base layer is bituminous and is made using cold manufacturing for the test section and this construction is compared to a reference section constructed using a conventional hot mix base layer. The functional properties of the two constructions are evaluated using different methods such as falling weight deflectometer, strain gauges and core samples.

The evaluations show that the test section with cold asphalt has lower stiffness and is exposed to higher strains compared to the reference section. The growth of rut depth and unevenness in the longitudinal direction of the road is considered to be at a normal level and the difference between the two sections are insignificant. Also, the laboratory tests indicate a clear difference for both the stiffness modulus and fatigue where the reference section shows superior properties. In the laboratory testing it was also noticed that the binder content was clearly lower than what was specified in the recipe which could possibly partly explain the inferior results.



Winter Road Congress 2020

The congress is held in Tempere, Finland. Anna Niska, senior research leader at VTI, lectures on sweep-salting of cycleways.

Electric Road Systems Conference (ERSC2020)

Welcome to the 4th Electric Road Systems Conference (ERSC2020), 12–13 May 2020 in Lund, Sweden

ICTTP 2020

ICTTP, International Conference on Traffic and Transport Psychology, is held in Gothenburg, Sweden.



VTI and SAFER are organising the world’s largest traffic and transport psychology conference in Gothenburg

In August 2020, VTI and SAFER are organising the International Conference on Traffic and Transport Psychology (ICTTP) in Gothenburg. ICTTP is held every four years, and this year is the seventh conference.


Kilometre tax is expected to have the greatest environmental impact

How can environmentally differentiated charges and other policy instruments reduce the freight transports' environmental impact? VTI has participated in a research project on this subject.


Increasing cycling among the elderly

Cycling is good both for your health and the environment. It can give you freedom and the ability to get out and about, not least for the elderly. But with age, it can become harder to choose your bike over your car. Maybe your fitness and balance are not...


VTI launches new research

VTI's ambition is to create cohesive maritime research in areas such as transport economics, logistics, environment, behavioural science, and navigation. One current assignment concerns the validation of research in a major international EU-project, Sea...


New study examines the mental health of seamen

Working at sea and being away from home for long periods can be mentally straining. In a preparatory study, researchers at VTI will examine how prevalent mental ill health is among ship crews in Sweden, and how the shipping companies' preventative efforts are...


Measurement of fatigue among bus drivers in London provides tools for better traffic safety

VTI has participated in a study of fatigue among London bus drivers. The study has given Transport for London the tools to implement measures that deal with fatigue among the city’s bus drivers.