Report of the first round robin test for mobile reflectometers: research carried out in the frame of the activities of CEN/TC 226/WG2

Luc Goubert

Mobile reflectometers for measurement of road marking retroreflectivity have been commercially available since the late 1990’s. It has been speculated that measurement errors are larger for these mobile instruments than for the traditional hand-held reflectometers. In order to get basic data for a new standard, CEN/TC 226/WG2 asked the Expert Panel to investigate measurement accuracy of mobile reflectometers. This investigation was carried out in a round robin test, in which the three most commonly used instruments in Europe participated: Ecodyn 30, LTL-M and Zehntner ZDR 6020. Two instruments of type Ecodyn were tested and one of each of the other two instruments; thus four reflectometers participated in the test. These instruments were denoted No. 1–4.

A test route of 19 edge lines and 2 lane lines was defined. All edge lines were continuous, plane or profiled, while the lane lines were plane, 3 metres long with a gap of 9 metres. At each test site a section of 200 metres was measured, twice with each instrument. As reference, a hand-held reflectometer of type LTL-2000 was used. At each test site, a number of 32–38 readings were taken with this instrument.



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.