Markens betydelse för vägräckens funktion: FUD RT Vägkroppens betydelse för vägutrustningars funktion


Background; Trafikverket (the Swedish Transport Administration) was asking for enhanced information about interaction between soil grading, bearing capacity and type approved vehicle restraints systems.

Purpose: To get enhanced knowledge about interaction between soil grading, bearing capacity and type approved vehicle restraints systems.

Method: Dynamic testing with an impact sled, some static push/pull tests and finally some full-scale crash testing with a passenger car into a barrier.

Results: Barrier posts should not have a shorter length below ground level than 1.0 meter. A slope shoulder behind a barrier installation should not be arranged closer than 0.6 meter behind the same. In soil with less bearing capacity or compact ability it is probably possible to enhance barrier functionality by using even longer barrier posts, with a larger proportion of the post being inserted into ground.



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)...