Assessment of the effectiveness of active speed: Warning signs - use in ductive loop data or empirical data?

Thorsten Kathmann

Excessive speed is still one of the main factors in traffic accidents. Numerous measures can be used nowadays to improve safety on roads. One main issue is reducing speed to a safe level. In recent years, new technologies have been used to this end. One of these are active speed warning signs (ASWS), which are activated by drivers whose speed exceeds a pre-set threshold. By means of a variable message sign, the drivers are made aware of their speed and the danger ahead. Typical locations for ASWS are town entrances and dangerous curves. Earlier this year, the "Instructions for Planning and Use of Active Speed Warning Signs" were introduced and published by the German Research Institute. In these instructions, a method is described on how to assess the effectiveness of an ASWS with the use of inductive loop data, as this data is normally available. The research presented here aims to analyze the effectiveness of an ASWS both with inductive loop data and with data especially gathered in empirical measurements.



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

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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.