Comol5 joint venture will realize the first part of the RijnlandRoute in South Holland, Netherlands

  • Joint venture with cutting edge expertise in tunneling, consisting of TBI companies Mobilis and Croonwolter&dros, DIMCO (DEME Infra Marine Contractors) and VINCI Construction Grands Projets
  • 4 km of new road to connect A44 and A4 in South Holland
  • 12 km of motorway widening under traffic with pertaining interchanges
  • €492 million contract
Press releases

The Province of South Holland has awarded the contract for building the RijnlandRoute to Comol5. This international joint venture consists of TBI companies Mobilis and Croonwolter&dros (25% each), DIMCO (DEME Infra Marine Contractors) (25%) and VINCI Construction Grands Projets (25%). The value of the contract is 492 million euros.

Comol5 will be responsible for the reconstruction of the Leiden West motorway junction and the construction of the 4 km new road N434, including a 2.2 kilometre-length bored tunnel. Comol5 will also implement 12km of motorway widening and adaptations to the A4 and A44 required for construction of the RijnlandRoute. These will be made under traffic with pertaining interchanges . In addition to construction, which will be completed in about 6 years, the contract comprises maintenance for 15 years.

The RijnlandRoute is the new road connection from Katwijk, via the A44, to the A4 at Leiden. The RijnlandRoute is being constructed to improve the accessibility and traffic flow in the region, and stimulate economic growth.

The project partners of Comol5 have ample experience with designing and developing large infrastructural projects such as bridges and tunnels, particularly bored tunnels. Projects they were involved in included a.o. construction of the Coentunnel and the Delft railway tunnel in the Netherlands, as well as the duplex tunnel (bored double-deck tunnel) in the A86 near Paris.

Comol5’s tender turned out to be the most economically advantageous tender (MEAT). This means that not only price but also added value was considered. Criteria that play a role include limiting environmental nuisance, traffic nuisance and risks.

Martin Ockier, General Manager DIMCO: “For a complex infrastructure project such as the RijnlandRoute, DIMCO can rely on extensive technical knowledge and experience. The technique of bored tunnels, our specialism alongside marine civil works, closely relates to dredging technology of the DEME Group, the mother company of DIMCO. Projects in our Benelux home market are important for the further development of our global operations. With Comol5 we can count on strong and experienced partners, and we look forward to a successful cooperation in order to realize the project.”

Additional information:
Vicky Cosemans 
Head of Communications DEME Group
+32 3 250 59 22

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