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The image shows two separate bridge constructions with associated build dates, costs, and dimensions, with each having a diagrammatic cross-section indicating the layers present under or around the bridge. The top bridge has a build date of 1986-1998, with a cost of $555 million; it spans 2.2 kilometers and has a depth of 1.5 meters, with a layer labelled 'sand' depicted beneath. The bottom bridge has a build date of 2002-2006, with a cost of $1.1 billion; it spans 3.6 kilometers and has a depth of 2.5 meters, with a layer labelled 'stone and clay' depicted beneath. Both cross-sections show four types of vehicles on the bridge, and three structures with semicircular rooftops above the bridge.
Given the complexity of the image, the above description may not be entirely accurate.
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The map displays the two different types of underground tunnel systems for cars accross two australian cities.
Overall, the bridge built from 2002-2006 compared to 1986-1998 can carry out more cars, but it’s costly with 1.1 billion dollars spent compared to the 1986-1998 bridge with only 555 million dollars spent.
Starting with the bridge built from 1986-1998. The underground tunnel has a height of 1.5 meters and the length of 2.2 kilometers, with it being created by the sand around it. It carries around 2 cars each lane for to come and go. As for the bridge built from 2002-2006. It has a underground tunnel height of 2.5 meters and 3.6 kilometers. Made by stone and clay for it to be much more sturdy compared to the sandy. It also carries 3 cars per lane for to come and go.
In conclusion, the 1986-1998 bridge is much weaker and smaller but it is not as costly as the 2002-2006 bridge which is much stronger and bigger that can accompany more.
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