The diagram illustrate two road tunnels had been constructed with specification and similar features in one of the main city in Australia between 1987-1992 and 2004-2007.
Overall, while the two tunnels consisted similar structure, tunnel B’s capacity, cost, and tunnel’s length and depth were more different than tunnel A.
Although both tunnels displayed similar structure, tunnel B’s length 3.6 km and depth 35m compared to tunnel A’s 2.2km and 2.5m. In contrast, tunnel A was built with two lines, tunnel B’s capacity had been increased with three lines. Between 1987 and 1992, tunnel A was built and $ 556 millions was allocated for that. In comparison, tunnel B was constructed from 2004 to 2007, and $1.1 billion had been spent.
Both tunnels were made with underground tube, whereas tunnel A was constructed over the water feature and it consisted with bridge. Underground tubes were similar, and connected with city. Between the tunnle A’s under ground tube and water feature, the sand and stone layer was constructed.