The diagram illustrates information about two road tunnels in two Australian cities. IBoth of them lie underground and help to avoid traffic jams during rush hours. This diagram outlines key differences between these two tunnels, the crucial one is their time period the building took place and the technical aspects. Neither of these tunnels lies deeper than 2,5 meter underneath the ground.
The first tunnel was constructed in 1986-1998 as a two-lane road. Its construction took 12 years. This underground tunnel cost 555 million dollars. Its length is 2.2 kilometres and it lays 5 beneath the ground. Between the surface of the land and the ground there is sand.
On the other hand, the second tunnel is longer 3,6 kilometres and is situated deeper (2.5 meters underground). It was built in 2002-2006, in 8 years. The technology has been developing, subsequently its construction was quicker than the building of the first one. And it cost more: 1.1 billion dollars. Above this three-lane road there are stones and clay.
