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CO2 reduction in 2025

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CO2 reduction continues

Date

31 March 2026

Expertise

Sustainability

In 2025, we reduced our carbon emissions by 4.3%. Our emissions relative to our revenue decreased by 1.5%. This puts us on track to achieve our goals: reducing our gross emissions by 50% in 2030 compared to 2021 and being climate-neutral by 2050, in line with the goals set in the Paris Agreement. Furthermore, we are committed to further increase our insights into our scope 3 emissions to identify and implement emission reduction measures in our material value chains. Additionally, we are taking steps to gain more insight into our other controllable emissions.

We see the effect of our measures to reduce the amount of emissions, especially regarding our buildings, car fleet and to a lesser extent within our equipment fleet. Furthermore, we experience that knowledge and awareness around sustainability in general and emissions specific are increasingly present among our colleagues.

A few highlights:

  • Company cars – In Sweden, we have switched from diesel to HVO. This has led to a significant reduction in emissions.
  • Equipment – In Italy, our equipment has become more energy efficient. We also did projects in relatively flat areas. This led to a decrease in fuel consumption. We are making our equipment more energy efficient in other countries as well. Examples include the retrofit of cranes, the use of emission-free equipment at projects and additional battery-powered generators purchased in Sweden.
  • Lease cars – Emissions from lease cars have increased slightly compared to Q2 2024, even though we have fewer fossil-powered cars and more electric cars in the Netherlands and Sweden. This is mainly due to the acquisition of a company in Italy.

Catenary pillars made of circular concrete

In 2023 and 2024, we initiated a value chain analysis for circular catenary pillars with the aim of producing and installing approximately 200 circular concrete catenary pillars annually in rail projects in the Netherlands. Because this product is not yet included in the client’s Standard Products Catalogue (SPC), we cannot yet apply it in regular projects. However, there are various pilots and many conversations. In March of this year, we discussed the pilot results extensively with all relevant parties during the Week of the Circular Economy. We are still committed to the joint efforts leading to the inclusion of the product in the SPC in the near future.

Circular catenary wire

We have prepared a value chain analysis for circular overhead lines to promote the application of more sustainable overhead lines and thus substantially reduce CO₂ emissions throughout the chain.

In October 2025, we celebrated the world-first with partners in the supply chain.

Thank you!

Thanks to everyone who contributed to the reductions! Both chain partners and colleagues play an important role in this. Together towards further reduction!

Read the report

Want to know more about our reduction, measures and initiatives? Read our 2025 CO2 progress report and energy action plan.

Open the document

On track to a sustainable future

Our sector has significant impact on the living environment as to the use of raw materials, waste, emissions and loss of biodiversity. This brings great responsibility and creates oppcortunities to make the world more sustainable.

Further info

Frequently asked questions

Find answers to frequently asked questions here.

What does sustainability mean in the rail and civil infrastructure sector?

Sustainability in rail and civil engineering focuses on reducing environmental impact across the entire lifecycle of infrastructure. This includes using emission‑free equipment, circular and recycled materials, and designing assets with a longer lifespan and lower maintenance requirements. Reusing structural components—such as circular viaduct beams or recycled copper contact wires for overhead lines—significantly reduces CO₂ emissions while conserving valuable raw materials.

How can CO₂ emissions be reduced in infrastructure projects?

CO₂‑reduction is achieved through a combination of clean construction methods and material innovation. Key strategies include:

  • Deploying zero‑emission machinery such as electric cranes, electric rail‑road vehicles (Krols), electric vans and battery‑powered locomotives.
  • Integrating circular concrete, geopolymer concrete, and recycled materials to lower embodied carbon.
  • Collaborating across the supply chain — from client to contractor to materials supplier — to scale circular and low‑carbon solutions.

These measures not only reduce carbon emissions but help create more resilient, future‑proof infrastructure.

Which sustainable innovations are being used in modern rail and civil engineering projects?

Infrastructure projects increasingly rely on advanced sustainable technologies, such as:

  • 100% recycled copper contact wire, reducing CO₂ emissions by up to 92%.
  • Geopolymer concrete, offering 50–80% CO₂ savings compared to traditional mixes.
  • Electric and battery‑powered locomotives for maintenance and logistics.
  • Circular overhead‑line foundations and poles made from low‑impact concrete.
  • The Energy Bank, an innovative click‑and‑go substation that captures and reuses regenerative braking energy.
  • Circular viaduct and bridge concepts, enabling reuse instead of demolition.

These innovations drive measurable environmental benefits throughout the asset lifecycle.

What is zero‑emission equipment in infrastructure construction?

Zero‑emission equipment refers to machinery that operates without producing exhaust gases, typically powered by electricity or batteries. Examples include:

  • Electric locomotives and battery locomotives
  • Electric cranes and rail‑road (Krol) vehicles
  • Electric vans and support vehicles

This equipment eliminates local emissions, improves air quality around work sites, reduces noise pollution and helps clients comply with increasingly strict sustainability requirements.

What does the future of sustainability in infrastructure look like?

By 2050, the infrastructure sector aims to be fully climate‑neutral. This future includes:

  • A robust, climate‑resilient infrastructure network designed for extreme weather.
  • A fully emission‑free construction fleet.
  • Circular material chains where components are reused at scale.
  • Rail as a leading sustainable mobility system, supported by smart energy management and low‑carbon construction methods.
  • Infrastructure that integrates nature, supports biodiversity and ensures safe mobility for everyone.

The transition is already underway, driven by innovation, collaboration and long‑term thinking.

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