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Band 8+: The diagrams below give information about two road tunnels in two Australian cities.Summarise the information by selecting and reporting the main features and make comparisons where relevant.

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Image for topic: The diagrams below give information about two road tunnels in two Australian cities.Summarise the information by selecting and reporting the main features and make comparisons where relevant.

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The image dated 08/09 2018 provides information on two road tunnels. The first tunnel, located under sand, has a depth of 1.5 meters and a length of 2.2 kilometers; it was built between 1986-1998 for a cost of $555 million and consists of two parallel tunnels, each with two lanes. The second tunnel, located under a city through stone and clay, has a depth of 2.5 meters and a length of 3.6 kilometers; it was built between 2002-2006 for a cost of $1.1 billion and consists of two parallel tunnels, each with three lanes.

Given the complexity of the image, the above description may not be entirely accurate.

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The diagram illustrate the key construction features of two road tunnels located in different Australian cities.

Overall, the two tunnel differ considerably in the cost, construction time, dimension and traffic capacity. Although Tunnel A took longer and cost less to build, it is smaller and carries fewer vehicles than Tunnel B.

Starting with the construction process, Tunnel A was built over a much longer period, from 1986 to 1998, whereas Tunnel B was completed in just four years between 2002 and 2006. Despite its longer construction, Tunnel A required a substantially smaller budget of $555 million, compared with the $1.1 billion spent on Tunnel B. In terms of geological conditions, the first tunnel was surrounded mainly by sand, while the second one was excavated through stone and clay.

Regarding their physical characteristic, Tunnel A is shallower and shorter, measuring 1.5 meters in height and stretching 2.2 kilometers. By contrast, Tunnel B reaches a depth of 2.5 meters and extends for 3.6 kilometers. This difference in scale is reflected in traffic capacity: the first tunnel contains four lanes, whereas the second accommodates six, making it capable of handling a larger volume of vehicles.

Word Count: 192

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Overall Band Score

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Vocabulary Complexity:
C1 - Intricate
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Grammar Mistakes: N/A

Vocabulary Repetition:

tunnel: 11

construction: 4

longer: 3

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Task Response

The report effectively addresses the task by presenting an overview and key comparisons between the two tunnels. It covers all main features: construction period, cost, geological conditions, dimensions, and traffic capacity. The structure is logical, with a clear introduction, overview, and detailed paragraphs. Minor inaccuracies (e.g., referring to depth as height) and slight omissions (e.g., not explicitly stating both tunnels have two parallel tubes) are acceptable and do not detract from the overall clarity. To improve, ensure precise terminology and consider explicitly mentioning the number of tubes for each tunnel.

Coherence & Cohesion

The report is well-organized with a clear overall statement and logical paragraphing. The use of cohesive devices such as 'Overall', 'Starting with', 'Regarding', and 'By contrast' helps the reader follow the description effortlessly. There are minor lapses, such as the phrase 'the two tunnel differ' which could be improved for smoother cohesion, but overall the message is clear and easy to follow.

Lexical Resource

The vocabulary is appropriate and varied, with good use of terms like 'key construction features', 'traffic capacity', 'geological conditions', 'excavated', and 'accommodates'. The report demonstrates a good range of lexical items, though there is room for more sophisticated and precise vocabulary (e.g., 'shallower' could be 'less deep', but it is acceptable). Overall, the lexical resource is strong and natural.

Grammatical Range & Accuracy

The report uses a variety of sentence structures, including complex sentences with subordinate clauses and comparisons. However, there are a few grammatical errors, such as 'The diagram illustrate' (should be 'illustrates') and 'the two tunnel differ' (should be 'tunnels differ'). These errors are minor and do not impede understanding, but they prevent the report from achieving a higher band score. With more careful proofreading, the grammatical accuracy could be improved.

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