The maps show two different underground tunnel systems for cars in two Australian cites.

The maps illustrate the construction of two underground vehicle tunnels in Australia, with the first built between 1986 and

1998

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1998,

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while

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the second was built between 2002 and 2006.

Overall

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, the two tunnels are considerably different, with the more recent one being larger, more advanced, and far more expensive to construct. The first tunnel was constructed from 1986 to 1998 and cost approximately 555 million dollars. It measured 1.5 meters in height and 2.2 kilometres in length, allowing only two cars to travel side by side.

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way was

also

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created through san, running beneath a river, with the bridge situated above.

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, the second path was built through stone and clay substrate in a time frame of four years between 2002 and 2006. It was significantly more expensive, with a total cost of 1.1 billion dollars. It was situated under a major highway in the city with numerous public facilities nearby.

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,

this

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underground motorway was longer at 3.6 kilometres, and

by

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apply

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one metre deeper than the earlier project.

In addition

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, it was wide enough to facilitate three vehicles for each way simultaneously.