Zwarts & Jansma
Civil engineering works
Rotterdamse Ruit (Rotterdam diamond) is a tangential highway structure around Rotterdam's central city that crystallized between 1955 and 1975. Two vital river crossings - the Van Brienenoord Bridge (1965) in the east and the Benelux Tunnel (1967) in the west - complete the circuit of the more than 40 kilometre long network. At the end of the 1990s the Benelux Tunnel was enlarged with an additional motorway lane, a metro tube and a bicycle tunnel. A central reversible flow lane can be brought into operation to ease the flow in the busy direction. The cycle tunnel has the poem 'Ari' by the Rotterdam author Jules Deelder written in tiles over its full length. This 900 metre long cycle tunnel is less ponderous than its counterpart in the Maas Tunnel and has a glazed lift, though both have long escalators and tiled walls.