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Visualisation of the completed motorway

A9 Gaasperdammerweg, Netherlands

Reconstructing and expanding one of the busiest Dutch road networks – the A9 Gaasperdammerweg in Amsterdam – will ease congestion and enhance the quality of life in the northern region of Randstad.


Mott MacDonald is acting as lenders’ technical advisor on behalf of the IXAS Zuid-Oost B.V. Consortium – a special purpose company comprising Ballast Nedam, Fluor, Heijmans Capital and 3i Infrastructure plc.

Design, construction and 20-year long maintenance works are planned in connection with the regeneration and expansion of the A9 motorway between the junctions of Holendrecht and Diemen, the bridge spanning the river Gaasp, all road surfaces and a 3km overground tunnel.

This PPP project has a nominal value of approximately €700M and was procured through a design, build, finance and maintenance format by the Dutch highways and water authority Rijkswaterstaat (RWS). It is one of five sub projects included in the Schiphol-Amsterdam-Almere (SAA) road expansion programme.


We initially conducted an independent evaluation of the technical solutions proposed by the SPC to help the project reach financial close and are now monitoring the progress of construction works to help ensure the project stays on schedule and budget.

This project builds on Mott MacDonald’s infrastructure experience in Benelux as the leading lenders’ technical advisor. To date, our dedicated teams have provided services on more than 20 (social) infrastructure PPP projects in the Netherlands and Belgium.


New and improved lanes will increase the flow of traffic and accessibility in the region while a new tunnel with a park above will provide an inspiring green space for the local community.

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