A9 Gaasperdammerweg menu EN Off the beaten track From the longest land tunnel to a park on the tunnel roof Home What we do Projects A9 Gaasperdammerweg A9 Gaasperdammerweg Holendrecht-Diemen 2015-2022 DBFM contract Ballast Nedam Infra Projects The A9 Gaasperdammerweg project is an example of going off the beaten track. As part of the IXAS consortium, Ballast Nedam contributed to the Schiphol-Amsterdam-Almere road extension for our client Rijkswaterstaat. The contract includes the design, building, maintenance until 2038 and financing. The A9 Gaasperdammerweg project includes constructing the longest land tunnel in the Netherlands and creating a park on the tunnel's roof. The project's main goal is to improve the accessibility of the northern Randstad region and the quality of life in Amsterdam Zuidoost. National Tunnel Standard Our integral responsibility within the project encouraged us to come up with creative solutions. The motorway was widened to have five lanes in each direction and an alternating lane, and we built the Gaasperdammertunnel, the longest land tunnel in the Netherlands. The tunnel spans 3 kilometres of the route and includes on and off-ramps. It is the first tunnel to be built following the National Tunnel Standards in the Netherlands and is demonstrably safe and reliable. In addition, the tunnel ensures a better traffic flow, cleaner air and less traffic noise in the surrounding residential areas. A good atmosphere, a good neighbour Given that 87,000 people live close to the project, we immediately researched how to reduce the impact on the environment as much as possible. This resulted in pile drivers being equipped with noise-reducing sheeting, the use of vibration-free foundation techniques, asphalted construction roads to reduce dust and noise and using the river Gaasp as a transport route. Within IXAS, opportunities to involve residents in the project were also considered. In cooperation with Rijkswaterstaat, we organised weekly guided tours, a pop-up cinema in the tunnel and various open days. Sustainable solutions Building consortium IXAS is responsible for the management and maintenance of the motorway and the Gaasperdammertunnel until mid-2038. As we want to carry out this work as sustainably as possible, we have opted for more than 5,247 luminaires with LED lighting in the tunnel, and 394 light towers with LED lighting have been placed outside the tunnel. In addition, we applied 15 kilometres of light-coloured asphalt and installed 5,246 solar panels (1.96 MW)—both saving and generating energy. Return to Project overview Share this page: Directly to News Stories Projects Expertise Facts & Figures Career Contact Intranet Newsletter We keep you up-to-date. Subscribe and read all relevant news items about Ballast Nedam. Subscribe Head Office Ringwade 71 3439 LM Nieuwegein +31 030 285 33 33 © Ballast Nedam 2021 Privacy statement Disclaimer We use cookies to ensure that our website functions better for the visitor. We also use cookies for our web statistics. Read more Ok