A73 tunnel renovation: Roertunnel and Tunnel Swalmen

Sustainable renovation

Sustainability is an important theme in this project. Among other things, a new layer of asphalt has been applied with light-reflecting white stone chippings, which contributes to energy savings in the tunnel lighting. In addition, energy-efficient installations have been used and active efforts have been made to reduce CO₂ emissions. These measures contribute to a lower environmental impact and a future-proof infrastructure.

Smart phasing and minimising disruption

The work was carried out in several phases, during which the tunnels were temporarily closed to traffic. During these closures, various initiatives were set up to limit disruption to road users. For example, Rijkswaterstaat's UIT-DE-AUTO Challenge encouraged travelers to use alternative means of transport, including e-bikes. These actions contributed to awareness and sustainable mobility.

Improved risk management

New to this project is the two-phase approach. This means there is an additional phase between the contract and the construction. In this intermediate phase, we work together with Rijkswaterstaat on the design and the construction planning, make joint choices and analyse the risks. This two-phase approach is part of an experiment by Rijkswaterstaat to achieve a better and fairer method of risk allocation. And thus to a healthier construction sector.

The result

The renovation work was successfully completed in the summer of 2024. The tunnels are fully operational again and comply with the latest safety requirements. Thanks to the upgraded installations, sustainable materials, and innovative techniques, the tunnels are ready for the future.

After the renovation

Ballast Nedam will remain involved with the tunnels even after the renovation. During the maintenance phase, we will ensure that the installations continue to function optimally and that the tunnels remain safe and available for road users. By applying the knowledge we gained during the renovation phase to maintenance, we guarantee continuity and quality in the long term.