The use of road surface characteristics to predict consequences for winter road maintenance

This paper consists of three parts that investigate how to use road surface characteristics in winter road management. The first part is a review of an investigation about summer and winter road unevenness. The two other parts are technical discussions how to use some specific road surface characteristics from experiences derived from summer road surface conditions.

In Sweden the condition of the paved roads are measured regularly. The measurements are carried out in the summer. An investigation has been done showing that the condition varies between different seasons. This leads to the question: Do we measure the road condition at the right time? Can we predict the change in road condition from one season to another?

This investigation was done using longitudinal road profiles and analysis of IRI (International Roughness Index). Unevenness within wavelengths of 3 to 10 meter was found to be most affected by seasonal changes. To demonstrate the use of road surface characteristics for safety related purposes a 3D model was created. The model was then used to detect ponds that were large enough to be risk areas for aquaplaning.

Another investigation was done to find out the relation between rut depth and snow removal. Another use of road surface characteristics could be to locate areas that are prone to become slippery. To do this the actual summer road smoothness expressed as macro texture is suggested to be used as indicator. The rougher and more stone rich the pavement is the more the risk of binding snow and creating icy condition increases.

MEET US


25-26
Apr

Cost Benefit Analysis (CBA) workshop in Stockholm

An open seminar and workshop in Stockholm will be held on 25-26 April 2018. The workshop deals with the use of CBA as a basis for decision-making in the public sector. The workshop is organized by, among others, Professor Jan-Eric Nilsson, VTI.
13-14
Jun

The 6st Humanist Conference

The 6th HUMANIST Conference will take place 13-14 June 2018 in the Hague, The Netherlands. The scope of the conference covers a wide range of topics on Human Factors in Transport. Tania Willstrand and Alexander Eriksson will present their research results.

LATEST NEWS


2018-04-17

VTI will develop simulators for ambulance staff

VTI has initiated a pilot study for paramedics with the Centre for Teaching & Research in Disaster Medicine and Traumatology and Linköping University. The aim is to give ambulance staff the opportunity to practice critical medical tasks in a moving vehicle in...


2018-04-12

Unique electrified road opens in Sweden

The world’s first electrified road recharging the batteries of cars and trucks while driving opened in Sweden. The Swedish Minister for Infrastructure, Tomas Eneroth, was at the formal inauguration of the electrified road on April 11, 2018. VTI is one of 22...


2018-04-11

Swedish road safety spreads internationally

Sweden is a leading country in terms of road safety, and the research conducted by the Swedish National Road and Transport Research Institute (VTI) has contributed to increased safety. VTI’s remit includes disseminating research results and keeping up to date...


2018-04-06

A greater understanding of cyclists' behaviour

Cyclists are often accused of not following traffic rules and being hooligans on the road. New research shows that there is no support for this perception. "Our observations reveal no such general anarchy" says Sonja Forward, researcher at VTI.


2018-03-28

New technology for road surface measurement tested

VTI has tested a new scanning-laser technology for road surface measurement. The tests show the new technology for comprehensive transverse-profile measurement provides dependable values in measuring transverse profile and rut depth.


2018-03-15

Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018

VTI’s Senior Research Leader Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018 for his work on research into tyres and road surface.