Känslighetsanalys av en modell för asfaltsdeformation


Increased commercial traffic volume, higher axle load limit, more frequent use of wide tyres, and a tendency towards higher tyre pressure have resulted in increased rates of rutting on asphalt pavements. Strain in asphalt pavements, caused by heavy traffic, is described by different models and serves as a basis for rut prediction. Prediction is however problematic because of varying and uncertain conditions. Studying the change in model output for a given change in input helps when trying to understand the importance of a correct input. In this report, it is shown how strain depends on compressibility, axle load, contact pressure, and, in some cases, variation in lateral position. Different variables affect the results in different ways. Results are therefore dependent on the choice of variables and the accounting area. The results, formulated from different perspectives, describe the significance of a variables influence on strain measurement without comparison in any definitive manner.



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...


Simulator used to practice emergency responses safely

Emergency responses of the police, ambulance, and rescue services are associated with a high risk of accidents, but practicing them in real traffic is neither safe nor permissible. A simulator-based method developed by the Swedish National Road and Transport...


Simulation of cut-in by manually driven vehicles in platooning scenarios

A study in a VTI-driving simulator has showed that a platoon will be able to handle a cut in from a manually driven car. The results of this study have recently been presented at two conferences in Japan.



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.


Self-driving buses in Sweden next year?

A self-driving, fossil-free bus. This idea might become reality through a forthcoming collaborative project involving the Swedish National Road and Transport Research Institute (VTI), Linköping University and several other participants. The project group aim...