Återvinning av tjärasfalt och krossad asfaltbeläggning vid motorvägsbygget på E4 vid Markaryd

Torbjörn Jacobson

When building a new part of the E4 motorway in the south of Sweden between the years 2004 and 2006, 100,000 tons of reclaimed asphalt was used for recycling. The reclaimed asphalt material came from the former part of the E4 which had to be excavated when building the new motorway. At the northern part of the new motorway, 30.000 tons of asphalt containing tar was recycled with a cold recycling technique using foamed bitumen. At the southern part of the new motorway, 70,000 tons of crushed asphalt pavements were recycled without adding of new bitumen. In both cases the recycled materials were used as road base which replaced a conventional unbound road base of crushed aggregate with the identical thickness, 80 and 150 mm respectively. In this report there is a description of the planning of the work, guidelines for recycling asphalt containing tar, crushed asphalt, pre-sampling methods, testing of the compaction of full-scale constructions, control sections, quality control and monitoring of the completed motorway.



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...