Fotgängares upptäckbarhet vid olika nivåer på vägbelysningen


In Sweden, road lighting is regulated in Vägars och gators utformning (VGU). Generally, the requirement is an average luminance level and a luminance uniformity of the road surface. An important question is if the requirements are reasonable? Too low requirements would mean poor traffic safety and too high levels would mean waste of energy and undesired impact on the environment.

In night-time traffic, accidents involving vulnerable road users are overrepresented, which may be caused by poor visibility. The aim with the present study was to investigate the influence of the average luminance and the luminance uniformity on the detection distance of pedestrians in road lighting.

Two pilot studies have been conducted as a full-scale trial on Tagenegatan in Gothenburg. This specific street has a road lighting installation where each light source can be dimmed individually. This means that both the average luminance and the luminance uniformity can be regulated independently. Thus, the effect of the average luminance can be studied at certain levels of uniformity and vice versa. In this experiment the average luminance 1.0, 0.5, 0.35 and 0.0 cd/m2 were studied along with the luminance uniformities 0.0 and 0.4.

In the first study, five subjects participated, travelling at approximately 50 km/h as passengers in a car. Their only task was to push a silent button when a "pedestrian" was detected. The pedestrian was a grey-painted obstacle, dark grey on one side and light grey on the other and it was located on the right pavement. This meant that the background of the pedestrian partly was the surface of the pavement, partly bushes close behind. The conditions were completely intertwined, which meant that six light conditions were studied, involving four pedestrians; light and dark grey, positioned just behind a light source and between two lanterns, respectively.



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.