King Willem-Alexander Tunnel
Novel Roadway Requires an Innovative Connector
The King Willem-Alexander Tunnel, located in the city of Maastricht in the Netherlands, is not your typical roadway tunnel built to alleviate traffic congestion. This 2.3-kilometer tunnel is actually four tunnel tubes stacked on top of each other, with two above and two below. The two upper tunnels are for local traffic while the lower ones are for through traffic. Each tunnel includes two lanes. Above the tunnel at the surface is a two-lane, dual roadway with cycling and walking paths in the middle surrounded by more than two thousand linden trees. This roadway is intended only for local traffic.
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