The given diagrams illustrate the comparison of two underground tunnels of two cites in Australia.
Overall, in addition to geographical differences and measurements, it is noticeable that the more recently tunnel was more advanced features, which facilitates urban traffic. Although the cost of the recent built tunnel was higher, time for its instructions was shorter than the older tunnel.
Moving on the expense and erected time of two tunnels, the first tunnel was needed to 12 years, from 1986 to 1998, to establish, while the second ones was just 4 years to finish, being faster than 3 times. By contrast, the second tunnels costed doubled the first one, spending $1.1 billion compared to over $550 million, it also offered the more accessible for transport systems, with 6 motor lanes, more higher 2 lanes to the other.
Turning to these length and geographical sites, there were the huge difference between two tunnels, the first route went 1.5 meter beneath a surface of sand, covering a distance of 2.2 kilometers. The modern tunnel was 2.5 meter underneath of the land composed of stone and clay, having a span of 3.6 kilometers.