The Chinese capital Beijing could have 561 kilometers (349 miles) of subway by 2010 and would supplant London as having the world's longest transit system.

The network, which would stretch to 19 lines, will reach every major corner of the city, though the plans are still subject to government approval.

Cities around China are spending billions of dollars building new subways or upgrading existing systems to try to beat the often chronic traffic jams that have come with years of booming economic growth.

Beijing's four metro lines carry 1.5 million people a day, and another three lines will enter service in time for the 2008 Olympic Games.

No price tag was given for the Beijing expansion, but the city is spending some $40 billion to improve infrastructure including road and rail links for the Olympics.

Beijing is also considering building six underground highways running north-south and east-west to lighten pressure on its overburdened ring roads.

Source:佚名