November 2021


On June 30th & July 1st 2022 the 6th TSO Forum will take place in Brussels (Belgium). The central theme, tunnel refurbishment, will be highlighted by relevant presentations, workshops and lively discussions. The event will start at Thursday morning and includes an afternoon site visit and a joint dinner in the evening. On Friday morning we continue with lectures and we close the event with a lunch. Of course, there will be plenty of time to meet and greet other TSO’s!

 Pre-register for the 6th TSO Forum in Bussels

Published in Workshops

The ITA COSUF TSO Webinar on Refurbishments of Road Tunnels (18 November 2021) organised by Activity Group 4 (Tunnels Safety Officers) supported by the Dutch Knowledge Centre for Underground Construction and Inderground Space (COB) was visited by 72 attendees mainly from Europe and few from India and New Sealand. This webinar was ment as a teaser for the bi annual TSO Forum in 2022, where the main topic will be tunnel refurbishment. This TSO6 will be organised on June 30th & July 1st 2022 in Bruxelles. After a brief introduction by ITA COSUF Chairman Max Wietek the main programme started with a presentation by Silvester Heijdemann (Rijkswaterstaat) and Harry de Haan (Rijkswaterstaat) of the renovation of the Heinenoordtunnel in the Netherlands. Besides renewals of equipment, a new safety concept with a central escape gallery is created and during construction one tube is in operation most of the time which is a challenge.  A second presentation was provided by Program Director Richard Bormans of Arcadis who is assigned by the Flamish Road Authority to carry out the preparations for the total and integral renovation of the Vierarmentunnel in the Brussels ring road and of the Beverentunnel in the Antwerp ring road. In this assignment BIM models, tunnel safety documentation and renovation files are supplied for both the TERN and non-TERN road tunnels. 

Both presentations showed that to prepare a road tunnel renovation one should not only focus on a safe final situation, but also on the construction phase where part of the tunnel is in operation.

The presentations can be downloaded here.

Refurbishment of Heinenoordtunnel by Silverster Heijdemann and Harry de Haan 

Renovation of Road Tunnels - A Flanders Example by Richard Bormans

Published in Workshops

On the 20-21 October 2021, an international meeting was held for the second time on new energy carriers for road transport, such as battery electric vehicles, vehicles propulsed by natural gas and hydrogen, and the negative consequences these new energy carriers can have for underground infrastructure. Due to the covid-19 pandemic, the conference was completely digital. Like the first congress in February 2019, it was organized by PIARC, ITA-COSUF and KPT. The various presentations show that knowledge about the risks of the new energy carriers has increased significantly in the past two years and that various solutions have been identified to manage these risks


The presentations (Day 1 and Day 2) and a full report can be downloaded here.

Full report of the workshop

Day 1 

Presentation Felix Haberl

Presentation Dmitry Molkov

Presentation Max Lakkonen

Presentation Patrik Fößleitner

Presentation Haukur Ingason


Day 2

Presentation Remi Berger

Presentation Christoph Willmann

Presentation Ola Willstrand

Presentation Holger Heinfellner

Presentation Frank Leismann

Presentation Oliver Heger 

Published in Workshops


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