DoorZigt also participates in the ProRail contests. For the first contest:
ProRail first contest
The second issue was won by Rob van der Bijl (RVDB/lightrail.nl) who was supported by Maurits van Witsen and Lieuwe Zigterman in the development of the idea
from train to tram.
Also in the third ProRail contest, DoorZigt was present.
Furthermore Lieuwe Zigterman won at Windesheim University the first prize from the Groninger harbours. This happened during the inauguration of Jan Jurriëns, professor "Controllability- ICT & logistics".