Shanghai's Metro system is by far the quickest way to travel across the city. Trains are very rarely delayed and, at busy stations such as People's Square, come every three to five minutes. There are currently eight lines in operation, three of which were opened in December 2007, and there are plans to build five more by 2012. Lines 1 and 2 cover most areas in central Puxi. Line 1 runs from Fujing Lu in the north via People's Square to Xinzhuang in the south; the eastern end of Line 2 reaches as far as Zhangjiang in Pudong and then runs under the Bund, through People's Square and westwards to Songhong Lu. Plans to extend Line 2 further west and east to link Pudong and Hongqiao airports are in the pipeline but are constantly delayed. The partially elevated Line 3 and Line 4 circumvent the inner city; Line 4 was completed in December 2007 and now runs in a circle linking Pudong and Puxi across the Huangpu River. Line 5 extends south to Minhang from the end of Line 1. Line 6 opened for operation in December 2007 and runs parallel to the Huangpu River on the Pudong side, from Gangcheng Lu in the north to Jiyang Lu in the south. Lines 8 and 9 were opened at the same time in 2007: Line 8 is known as the 'Yangpu Line' and has 20 stations running from Shiguang Lu in the north via People's Square to Yaohua Lu; Line 9 covers the south-west of the city from Songjiang Xincheng to Guilin Lu but as yet does not connect to any other existing Metro line. Construction on Line 12 is due to begin in 2008; it will connect Minhang with Pudong and should be ready by 2012. The city's five year guidelines for urban traffic improvements state that by 2010, 75% of Shanghai residents should have access to the rail network within 600m of their homes. Currently around 2 million people use the Metro each day, a large proportion of them during the daily rush hours of 07:30-10:00 and 17:00-19:30, when carriages can become unbearably crowded. Tickets are cheap at between ¥3 and ¥9 for a single journey and can be bought at a counter or at the surprisingly helpful self-service machines inside the stations. If you have a Shanghai Transport Card (jiaotong ka) you simply need to swipe this over the scanner on the turnstyles as you enter and exit the platforms. Once on board, announcements are made in both English and Chinese. Metro Line 1 operates from 05:20 to 23:30, Line 2 from 06:30 to 23:00, while other lines start between 06:00 and 07:00 and run until 21:30-22:30. Visit the transport section of www.shanghai.gov.cn for further information.