Could adherence and road geometry be used to identify the areas of risk?

Download
Michel Gothie

Although road traffic accidents rarely have a single cause, if we take into account the relative amounts of time pavements are wet rather than dry, twice the proportion of accidents occur on wet pavements. This paper uses a number of case studies to attempt to assess if adherence and road geometry could explain the increased risk during wet weather. In recent years, the link between pavement surface characteristics and accident risk on wet pavements has been demonstrated by a number of authors from different parts of the world. The analysis conducted in the studies described in this paper confirms this link, without claiming to measure in absolute terms the effect on road safety of the factor considered (friction, texture or layout). Nevertheless, comparisons between case studies on routes with very different layouts and driving conditions show that: 1) friction and texture characteristics have the same type of effects on the accident rate on wet pavement, namely - a) the accident rate tends to increase when the sideway force coefficient or the macrotexture diminishes, b) the change in the accident rate is not steady, but becomes much less below certain values; 2) the curvature radius of the bends, on difficult road layouts, is an important factor of influence on the accident rate, and on the severity of these accidents.

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...