The pictures give information about tow road tunnels in the city of Australia.
Overall, it is noticeable that both of the tunnels are twin tube, but the cost of constructions are different. Additionally, how many years that lasted to build them are not same.
Looking at the diagram in more detail, tunnel A had been built 25 meters under the bridge during the 5 years and the cost of it was 556 million dollars. The length of road tunnel A is about 2.2 kilometres it is twin tube that a trunk and a car can pass side by side each other in one tube at the same time. Also, road tunnel A was located in the 25 metres under water that the layer of stone and stand keep it safe against the water intrusion.
Road tunnel B was situated in the 10 metres deeper than tunnel A and the length of it is 1.4 kilometres more than other. The cross section of tunnel is twin tube, but in comparison with tunnel B, one lorry and two types of cars can pass in the each of tube simultaniesely. The road was constructed between the years 2004 and 2007 and how much money spend on it was about twice of the other road.
