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This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Express highways such as Hu–Ning, Ning–He, Ning–Hang enable commuters to travel to Shanghai, Hefei, Hangzhou, and other important cities quickly and conveniently. Inside the city of Nanjing, there are 230 km (140 mi) of highways, with a highway coverage density of 3.38 kilometres per hundred square kilometrs (5.44 mi/100 sq mi). The total road coverage density of the city is 112.56 kilometres per hundred square kilometres (181.15 mi/100 sq mi). The two artery roads in Nanjing are Zhongshan Road and Hanzhong. The two roads cross in the city centre, Xinjiekou.
Output:
What type of highways let commuters get to cities fast?