The maps depict differences of the underground car road tunnel systems in two different cities in Australia.
Overall, the system of the tunnel was built by different types and also in different year and different amount of how much it cost.
The first tunnel system erected under-water for 2,2 Km and 1,5 M below from the surface. Meanwhile, the under-ground tunnel built for 3,6 Km which have different length about 1,4 Km. The tunnel system also had different structure above it, the under-water tunnel structure contains of sand that layered above the tunnel and the under-ground layered with other materials that contain stone and clay.
The under-water tunnel was constructed for 12 years from 1986 to 1998. Meanwhile the under-ground tunnel was built shorter for only 4 years from 2002 to 2006. The under-water tunnel was designed for total 2 cars in every tunnel system, meanwhile the under-ground system built for 3 cars in a single row of tunnel.
