Fyrhjulingars köregenskaper och förarnas kunskap om dessa egenskaper

Download

Riding quad bikes differs in many ways from driving passenger cars and the rider is not always aware of the differences required to maintain control of a vehicle that they are not trained to ride. One of the major differences with quad bikes compared to driving a car is that a quad bike has a tendency to roll over during sharp cornering. The purpose of this study was to compare both static vehicle characteristics and driving dynamics of motorcycle-registered quad bikes of different models to identify any difficulties that may arise when using quad bikes in road traffic. The aim was also to study how driving style affects the quad bike’s driving dynamics and identify the riders' knowledge of these.

The study consists of three parts of which the first two concerns vehicle handling characteristics studied by performing a series of 1) static and 2) dynamic performance tests. The static tests consisted of measuring the angle at which the vehicle rolled over sideways by means of a hydraulic tilting table. The dynamic test consisted of performing a series of test runs on different test tracks in order to study the dynamic behaviour of the quad bike. The third part addressed the question whether riders have the necessary knowledge to drive quad bikes safely by conducting focus group interviews with persons with different driving license categories and driving experience.

The results of the static test showed that the rollover threshold of the quad bikes is affected by the weight of the rider due to the relative lightweight of the quad bike. The dynamic tests verified that the rider could, by using his/her own body weight, compensate for the physical forces acting upon the vehicles’ tendency to roll over by using an active driving style. The focus group interviews showed that most of the interviewed persons believe that an active driving style is needed to drive safely and that the current training for the driving license lacks necessary training for driving a quad bike.

MEET US


5-6
Dec

Vision Zero for Sustainable Road Safety in the Baltic Sea Region

The conference Vision Zero for Sustainable Road Safety in the Baltic Sea Region is held i Vilnius, Lithuania. VTI is part of the organisation committé and also one of the speakers.

LATEST NEWS


2018-10-18

ADAS&ME is tackling the interaction between people and technology

ADAS&ME is a major EU project focused on automation, the human condition and the human environment. The budget is EUR 9.6 million and VTI is the coordinator.


2018-10-05

Users contribute to the development of train simulators

Apart from advanced driving simulators, VTI has developed several variations of train simulators which are used for training, education and research. In recent years, interest has increased drastically among major actors in the railway sector, and VTI has...


2018-10-03

VR study to contribute to a better working environment for bus drivers

A study where bus drivers test autonomous driving in a VR environment may contribute to a better working environment with reduced stress on the driver and safer driving.


2018-10-02

Non-native plant species spread via transport systems

Researchers at VTI have compiled a report on non-native invasive plant species in Sweden and how they spread via transport systems.


2018-09-20

EU-project VIRTUAL: improving road safety with virtual crash tests

Crash tests are used to improve safety on roads. Therefore the EU now funds a research project to develop virtual methods of crash testing. VTI coordinates the project, called VIRTUAL. The project now invites experts interested in Human Body Modeling to join...


2018-08-28

EU project protects cyclists and pedestrians

According to the World Health Organisation, more than one quarter of road traffic fatalities in 2010 were pedestrians and cyclists. Every year, about 335,000 unprotected road users die because of traffic accidents, which shows the scale of the problem. The EU...