Ramboll
Ramboll is a global engineering, architecture and consultancy company with more than 18,000 experts that create sustainable solutions for governments and companies all over the world.
- Date
- 20 November 2025
- Time
This event has now ended
Overview
The Copenhagen Metro has an ambition to reduce the carbon footprint of new constructions by 50%. The baseline is set as “a current design approach in which there is no consideration of carbon”, and this is defined by the most recently opened lines in 2019 and 2024.
To achieve this, we are applying a process of active carbon management in the design of the new lines - M5 and the extension of M4 - and in other minor construction works that are ongoing.
This presentation will outline the current status of the largest project - M5 - and describe how our innovation programme and carbon management have delivered significant improvements to the carbon footprint.
Following the lecture, there will be a networking session with food and drinks in the ICE Kendal's bar sponsored by Ramboll.
Event Organiser
British Tunnelling Society
The BTS is a dynamic group of tunnelling professionals sharing knowledge within the industry.
Speakers
Alun Thomas
Metroselskabet
carbon manager
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Alun Thomas
An accomplished tunnel designer and specialist in sustainability.
Experienced in all types of tunnelling, from segmental linings to immersed tube tunnels, including many major projects worldwide such as Crossrail, Hong Kong metro, Delhi metro, Heathrow Terminal 5 and the Karahnjukar hydropower project. Author of a book on Sprayed Concrete Lined Tunnels and more than 50 articles on a wide range of topics from numerical modelling to risk management.
Technical expert in sustainability in tunnelling, in particular Life Cycle Analysis and carbon footprint calculations, carbon management and low carbon materials.
Active in many industry bodies such as ITA WG 12 (Sprayed concrete) - Vice Animateur from 2019-22, the ITA Sustainability group, ITAtech group on Low Carbon Concrete Linings and past chairman of the ITAtech activity group for Precast Fibre Reinforced Concrete Segments.
An active member of Engineers Without Borders – Denmark.
Jon Banyai
Metroselskabet
team leader for innovation
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Jon Banyai
Jon is a highly experienced tunnelling engineer who has worked on all types of tunnels, around the world – ranging from pipejacks to Sprayed Concrete Lined tunnels, from segmental linings to immersed tubes.
He started his career in the UK working as a consultant before relocating to Copenhagen, Denmark, 15 years ago. He has worked on many major projects in the UK and abroad, including Heathrow Terminal 5, Crossrail, the Fehmarnbelt tunnel between Denmark and Germany, and the Marieholm immersed tube tunnel in Sweden. Jon has supported Copenhagen Metro on projects since 2012, for the M3 Cityringen, the M4 line, and now the future M5 line and the M4 extension.
Jon graduated from UCL in 2001.
Jon is also the ICE’s Country Representative for Denmark.
Sustainable Development Goals:
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