The maps show the differences between two underground tunnels projects for cars in two Australian cities in 1986 – 1998 period and 2002 -2006 period.
All in all, there were differences in tunnels deep constructions, the tunnels length, the cost, and the location where the tunnels were constructed. Moreover, the tunnels in the period 2002-2006 was built in the wider space with more car lanes. Generally, the tunnels, which were built in the period of 2002-2006 was more advance than the one was built in 1986-1998.
In the period of 1986 – 1998, the tunnel was built in 1,5 meters underground with 2,2 kilometers in length under the sand and water composition. It was cost $555 million to finish the project. This tunnels only have 2 lanes for cars made it limited for people who want to drive via the tunnels.
On the other hand, for the tunnels in the period 2002-2006 was more advance and save than before. It was built deeper with 2,5 meters underground with stone and clay above the construction. The tunnel was constructed 3,6 kilometers in length, make the road not too steep. The tunnels build wider with 3 lanes of cars. However, the cost to build the tunnel was pricier than before. Is cost $1,1 billion to finish all the projects.
