Fyrhjulingsförares beteenden och felhandlingar


As quadbikes are becoming more and more common the number of accidents also increases. The first aim of this project was therefore to increase our knowledge of the accidents whilst the second aim was to increase our knowledge of how and where quadbikes are used, the mistakes and violations that are made and what situations and behaviours drivers consider as risky. The project was divided into two sub-studies. In the first sub-study 51 road traffic accident registered in Strada-police were analyzed and in the second 7 injured drivers (involved in any one of the 51 road accidents registered in Strada) and 22 non-injured drivers were interviewed. The results show that quadbikes are popular vehicles with many capabilities; as tools, as recreational vehicles and as vehicles for transport. Inexperienced drivers’ lack of knowledge, alternatively experienced drivers’ stress and/or carelessness combined with the quadbikes special characteristics; underage drivers; quadbike-driving under the influence of alcohol and excessive speed may however lead to accidents. Without a helmet the consequences of an accident might become more severe. Based on the results of this study, the authors recommend a series of measures to reduce the number of serious quadbike accident.



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)...