TWIN at Eurobike 2015

The TWIN project was successfully presented at Eurobike.

TWIN was a co-exhibitor at the AVERE-LEVA booth.  On Thursday 27 August, there was a special information meeting on TWIN at Eurobike. At the meeting, Annick Roetynck, assisted by Roel Postma (Innovam) and Thomas Jaeger (CELF) gave an update on the state of affairs for the project and provided further details on the final two days’ workshop in November.

You can download the presentation here:

For further details on the final TWIN Workshop, click here:
or contact Annick Roetynck,, tel. +32 9 233 60 05.

Traffic safety of electric bicycles: a naturalistic study

The number of electric bicycles has increased in recent years and continues to increase both in Germany and elsewhere. For example, 410,000 electric bicycles were sold in Germany in 2013. The growing number of electric bicycles and the possibility of higher speeds give rise to concerns about road safety, in particular the risk of crashes and accidents.

Consequently, German Insurers Accident Research (UDV) and Chemnitz University of Technology carried out a large-scale naturalistic cycling study to investigate the vehicle usage, speed and road safety of users of electric bicycles in Germany. Three groups were compared: riders of pedelecs, s-pedelecs and conventional bicycles.

A field study approach was selected to collect cycling data in a realistic yet controlled setting. More specifically, they took a naturalistic approach: the participants’ behavior was recorded during their daily life as unobtrusively as possible. For this purpose, they developed a data acquisition system (DAS) with video cameras and different sensors which were fitted on the participants bikes.

There were a total of 90 participants. 49 of them were pedelec users, 10 were s-pedelec users, and 31 were ordinary cyclists. Each participant was observed for a period of four weeks riding their own bike. In addition, participants were required to fill in a travel diary for one week to record all journeys, not just those for which they used their bike.

The comparison of conventional bicycles, on one hand, with pedelecs and s-pedelecs, on the other hand, shows that the latter are not less safe than bicycles  or associated with different risks. The potentially higher speeds of pedelecs are used mainly by s-pedelec users. Pedelec users use the motor assistance primarily for convenience.

For the report, click here: