This project involved extending the traffic capacity of the main roads crossing the runway located within the Schiphol Airport region in Amsterdam. To realize this goal, a three-lane tunnel and a two-lane tunnel were constructed adjacent to an existing tunnel tube. Upon completion of the new tunnel construction, the existing tunnel was rebuilt to include a three-lane tunnel and a two-lane tunnel.

ARCADIS performed several functions during the realization of this project, including the following:

• Realization of a water storage facility.
• Completion of a cable tube running from the services building to both Schiphol tunnels.
• Mounting of double walls in the closed section of the second Schiphol tunnel.
• Completion of roadway structure, side wall and mid wall structures, and the accompanying canopy structure for the north entry of the second Schiphol tunnel.
• Mounting fire-resistant cladding of the closed section of the second Schiphol tunnel.
• Mounting a traffic guidance wall in the existing Schiphol tunnel.
• Assembly of a wall structure with accompanying canopy and daylight grille structure for the south entry of the western tunnel tube of the existing Schiphol tunnel.

Other technical services performed included:

• Supplying the electrical, mechanical, and technical systems in the second Schiphol tunnel.
• Supplying and mounting of the electrical mechanical systems in the new services building and the cable tube situated between the services building and both Schiphol tunnels.
• Supplying and mounting and/or adjusting the electrical mechanical systems in the existing Schiphol tunnel and the existing services building.

The following systems were integrated into the project during completion:

• High-and low-voltage, emergency power, and no-break power systems.
• Earth system.
• Tunnel, building, escape route and site lighting systems.
• Pumping systems.
• Aid stations, powder extinguishing panels and fire extinguishing facilities and systems.
  Road signaling and height-detection traffic systems.
• Tunnel and building ventilation systems.
  CCTV, HF, loudspeaker, intercom and telephone communication systems.
• PLCs local, central and transmission control systems.
• Light and power, AC/CV, security, intercom and telephone building systems.
• Burglary security system.