Contributing factors regarding wrong-way crashes on Illinois freeways

Huaguo Zhou
Lin Wang
Andrew A Neath
Ryan Fries

In order to investigate contributing factors to wrong-way crashes on freeways based on information available in crash databases and reports, Haddon matrices, statistic tests, and simulation techniques were used to analyze fatal and injury crashes caused by wrong-way driving from 2004-2009 in Illinois. As a first step, a Haddon matrix was developed for each wrong-way crash in which different factors were identified for before, during, and after the crash. These factors include drivers’ age, drivers’ condition, crash causes, vehicle type, vehicle maneuvers, roadway conditions, weather, and wrong-way entry points. Next, ANOVA and Tukey tests were conducted and a ranking and grouping of the factors was obtained. Furthermore, due to a limitation of ANOVA testing caused by data non-normality, a simulation technique called the bootstrapping was employed. A ranking was then made based on the frequency of each factor as well as the chance of a factor being the leading contributing factor. The analysis results indicated that being alcohol impaired, darkness, and driver’s age are the top contributing factors to wrong-way crashes.



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.



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.


Steps need to be taken to increase traffic safety of automated cars

Several steps are necessary to ensure that automated and connected cars will lead to increased traffic safety – everything from ensuring that technology takes vulnerable road users into account, to new forms of driver training. This has emerged in a position...


FALCON examines challenges in the transport sector

VTI is one of several important partners in the major FALCON project*, whose purpose is to create knowledge and insight regarding the transport sector. In an initial subproject, VTI has produced a manual on transport, logistics and multimodality.


VTI joined research cooperation in China

In December 2017 VTI became a member of China-Sweden Research Centre for Traffic Safety (CTS).


Swedish German research collaboration on Electric Road Systems

The project “Swedish-German research collaboration on Electric Road Systems” (CollERS) has now officially started. The goal of the project is to increase the common knowledge around Electric Road Systems by cooperation between Germany and Sweden and to...


Electric Road Systems Conference 2018

After a successful first conference in June 2017, the Swedish research and innovation platform for electric roads is arranging the second dedicated International Conference on Electric Road Systems (ERS) June 13th and 14th 2018.