The given picture compares two tunnels in different locations in Australia. Overall, the differences vary in the tunnels’ shape, capacity, fiscal expenditure and years of building.
Regarding shape, the tunnel built under the bridge is more curved to avoid breaking the above sand and water layers. Meanwhile, the other tunnel is constructed in a less lopsided shape, which owes much to the stable and sturdy stone-clay surroundings. Plus, the range of underground space required to build the first tunnel is lower, at 1,5 meters compared to the second one with 2,5 meters needed.
In addition, the tunnel located under the main road is also wider, allowing up to three vehicles in a row, while the former tunnel can only provide enough space for two cars. Concerning these tunnels length, the one lying under stone and clay layer is 1,4 kilometers longer than the other.
Due to its more extensive length and width, the latter tunnel, which was built during 2002-2006, cost more money-1,1 billion, approximately doubling that of the earlier built road tunnel. The greater width and length of the latter tunnel may be explained by the development and omnipresence of the transportation system, as more people are travelling by cars than before.