What makes this new tunnel special is its experimental character: it is the first drilled tunnel in the Netherlands. A drilled tunnel lies a lot deeper than a sunken tunnel. As it turned out, in this case there was just enough room to allow the farming traffic to descend and ascend by themselves (on a steep slope of 1:30). This proved impossible for cyclists, since they can manage a maximum slope of 1:15. For cyclists we developed two large 'bowls' on both sides of the actual tunnel, with escalators and a big lift.
Social safety and the utilisation of durable materials that are easy to maintain are essential here, all the more since there will only be a lot of traffic during rush hour, whereas the tunnel will have to remain open 24 hours a day.
Award
Winner: Concrete award 1999
Client: Bouwdienst Rijkswaterstaat
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