Samband mellan vägbelysningsnivå och spontant vald hastighet

Samband mellan vägbelysningsnivå och spontant vald hastighet: förstudie


If something in the road environment is improved, there is always a risk that the drivers will compensate for the better conditions by increasing speed. As an example, one study showed that the introduction of delineator posts in Finland increased the average speed by as much as 10 km/h on curvy roads. Another study, carried out in Norway, showed an increase in speed of 1 – 5 per cent when road lighting was put up. Therefore, one reasonable hypothesis is that speed will increase with increasing lighting level. The primary purpose with this study was to test a method for measurement of spontaneous choice of speed related to lighting level. This means studying the speed chosen by a driver when he or she is not disturbed by other traffic. Space mean speed was measured by the use of an instrumented vehicle which could register speed continuously. Furthermore, this vehicle was equipped with a video front camera which made it possible to afterwards reject measurements which were not undisturbed. Each subject drove the test road, which had an illumination level of 0 to 30 lx, at off-peak hours both in daylight and darkness. The speed limit on all test sections was 50 km/h, all sections dry and illuminated on one side, only. However, one section had no stationary lighting at all. The method for data collection worked out, but was slow. The results show a weak, but clear tendency to higher speed with higher illumination level. The number of subjects, six, were small, therefore significant results should not be expected.



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...


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...


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...