The maps give information about the differences of two road tunnels in two different Australia cities. (The maps compare two different tunnels in two Australian cities).
What stands out from the maps is that in addition to the geological differences and measurements, Tunnel 2 cost more money but took less time to complete and has more space for vehicles than Tunnel 1.
Looking first at tunnel 1, at the depth of 1,5 meters underground, it has a 2,2 kilometers length. Its location is below a river over which a suspension bridge is built. In terms of the geology, the soil in this area contains mostly sand. The construction took 12 years from 1986 to 1998 and cost 555 million dollars. Inside, there are 2 carriageways with a total of 4 lanes.
Returning to tunnel 2, its depth and length were 2,5 meters and 3,6 kilometers, respectively. It runs underneath an urban city with asphalt roads and high buildings. It took only 4 years to erect, starting from 2002 to 2005 with a cost of 1,1 billion dollars, which was twice as much as the cost of tunnel 1. This tunnel also has 2 carriageways, but there were 6 lanes in total here.