The picture demonstrates a comparison between two road tunnels, which are located in two different cities in Australia.
Overall, the first tunnel was built under a bridge, and it is less deeper than the second tunnel. The second road tunnel was built in 4 years later and it is located under the road.
Beginning of the first image, the first tunnel was built over 2 years from 1996 to 1998. The main material was stand. The cost of construction was $ 555 million. The depth is one and a half meters.
On the second picture we can see the second tunnel, which has been constructed from 2002 to 2006 and the costs amounted to $1.1 million. It has 3 traffic lanes, unlike the first tunnel, which has only 2 lanes. Besides, its depth is 2,5 meters. This tunnel is constructed from a mix of stone and clay. Therefore, the second tunnel was projected as more sophisticated than the first one.
