The diagrams compare the specifications and structural details of two tunnels located in a city of Australia, namely Tunnel A and Tunnel B.
In comparison to Tunnel A, Tunnel B exhibits significant distinction in terms of construction timeline, dimensions, and financial investment.
Tunnel A was constructed over a five-year period from 1987 to 1992 and incurred a total expenditure of $556 million. This tunnel features a twin-tube cross-section, spans a length of 2.2 kilometers and reaches a height of 25 meters. Furthermore, its structural composition is primarily constituted of stone and sand, which provide to its stability and durability.
In contrast, Tunnel B was developed later, from 2004 to 2007, with a significantly higher construction cost of $1.1 billion. This tunnel, also designed with a twin-tube cross-section, extends over a greater length of 3.6 kilometers and boasts a height of 36 meters, making it taller than Tunnel A. The increased size and financial outlay for Tunnel B reflect achievments in engineering and project specifications during its construction period.