The table below gives information about the underground railway systems in six cities.

The table shows data about the underground rail networks in six major cities. It compares the six networks in terms of their age, size and the number of people who use them each year.

It is clear that

Linking Words

the three oldest underground

systems

Use synonyms

are larger and serve significantly more

passengers

Use synonyms

than the newer

systems

Use synonyms

. The London Underground is the oldest

system

Use synonyms

, having opened in 1863. It is

also

Linking Words

the largest

system

Use synonyms

, with 394

kilometres

Use synonyms

of route. The second largest

system

Use synonyms

, in Paris, is only about half the size of the London underground, with 199

kilometres

Use synonyms

of route.

However

Linking Words

, it serves more people per year.

While

Linking Words

the Tokyo

system

Use synonyms

is only third in size, it is the most easily used, with 1927 million

passengers

Use synonyms

annually. Of the three newer networks, the Washington DC underground is the most extensive, with 126

kilometres

Use synonyms

of route, compared to only 11

kilometres

Use synonyms

and 28

kilometres

Use synonyms

for the Kyoto and Los Angeles

systems

Use synonyms

. The Los Angeles network is the newest, having opened in 2001,

while

Linking Words

the Kyoto network is the smallest and serves only 45 million

passengers

Use synonyms

per year. In short, the latest railway

systems

Use synonyms

serve fewer

passengers

Use synonyms

than the oldest,

due to

Linking Words

the large gap between the

kilometres

Use synonyms

of their routes.