Säker framkomlighet: trafiksäkerhetseffekter på mitträfflade vägar

Arne Carlsson
Urban Björketun

Within the project “Safe accessibility” initiated by the Swedish Transport Administration, development of the use of rumble strips as a measure for improved traffic safety is carried out. Rumble strips are placed in the centre line on roads wider than 7 metres and with a speed limit of 80 km/h or higher. At the request of the Swedish Transport Administration, VTI has completed a study analysing the effect of such rumble strips on the road. The main purpose with central rumble strips is to “wake up” drivers who for some reason unintentionally are starting to pass the middle line. Earlier studies abroad and Swedish in-depth fatal accident studies indicate that this measure would have a positive safety effect, especially on running off the road to the left and head-on accidents. The aim of this report is to study the accident rates on roads which have been equipped with rumble strips in the middle. The most important parameter to study is the rate of fatalities or seriously injured road users (FSI-rate) after the measure (performance of rumble strips) compared to the FSI-rate before the measure. It should also have been desirable to study the course of accidents of the actual accident types. However, it has not yet been possible to perform such studies due to uncertain accuracy in the accident spot determination and description of the accident course. The analysis is based on information about the location of roads with rumble strips from the regional offices of the Swedish Transport Administration and accident data from the data base STRADA in the period 2003–2009. The work is a before/after-study in which accident rate before the milling of rumble strips in the middle of the road is compared with the period after. Some of the roads have been equipped with automatic speed cameras during the project. In the present summary, mainly results from roads which were not equipped with speed cameras are accounted for; 212 objects of the total length of 2,570 km. But 17 of these 212 objects have got a reduction of speed limit in September 2008. Thus there are 195 objects with unchanged speed limit, which consist the main results of the study.



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.



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...


Swedish organisations in EU project on traffic safety and crash testing

Crash safety testing is one of the tools used to improve safety on roads. The EU is therefore funding a research project that started recently to develop virtual methods of crash testing. The long-term goal is to supplement the physical evaluation of crash...


International Conference on Electric Road Systems starts today

Electric Road Systems (ERS) is a relatively new concept with many initiatives on the way. To learn from each other and stimulate new collaborations the Swedish Research and Innovation Platform for Electric Roads arranged the first international conference...


Same survey of road users’ attitudes in 50 countries

At the Road Safety on Five Continents Conference, RS5C, one entire session presented a large survey of road users' attitudes in 38 countries. Results show large differences between countries in many areas, both regarding behavior and attitudes. A new survey...


Good results with alcohol interlock program according to Swedish study

An alcohol interlock program makes it possible for drink driving offenders to continue their everyday lives. In a Swedish study most of the participants were satisfied with the program and experienced improved health. They also reported drinking alcohol more...


Traffic safety in the spotlight

Today the Conference Road Safety on Five Continents (RS5C) opened in Jeju Island, South Korea. More than 220 participators have come from all over the world to present findings and learn about traffic safety. Dr. Young Tae Kim, Secretary-General of the...