The four given maps provide the information of the two different underground tunnel systems for cars in two different cities in Australia.
Overall, it can be clearly seen that the two tunnels has been established under different types of construction, as well as the wide of these tunnels. In addition, the cost and year to built these two underground tunnels were significantly different.
To start with, it took 12 years to finished the first tunnel, while the second tunnel only needed four years. Furthermore, the cost of the second tunnel almost doubled from the first tunnel ($555 million) at $1,1 billion. Additionally, the wide of the first tunnel was only fit for two cars each line as opposed to the second which could set for three cars per line.
It can also be noticed that tha first tunnel was built 1,5 meters under a bridge. In contrast, there was a city and roads above where the second tunnel was built. Moreover, the material surrounding the two tunnels were also diffferent, the first tunnel had a sand-based ground, while the second had a stone-and-clay-based. However, the lenght of the first tunnel was at 2,2 kilometers, shorter than the second tunnel which was at 3,6 kilometers.
