Note the final sentence below. Unlike in Australia, Canada and England, you don't get slogged an usurious fare when you catch a train to the airport. It is actually cheaper if you travel by train to catch a plane. That is a great incentive to get people to use the train rather clogging up roads.
The Shanghai Maglev was opened for public use in 2004. It runs between Pudong Airport and Longyang Road subway station (east of Shanghai). Maximum service speed is 431 km/h, however this speed is normally only reached between 09:00 – 10:45 and 15:00 – 16:45; at other times it runs at a maximum speed of 300 km/h. The line is a demonstration line, and does not really run anywhere particularly useful (unless you happen to live near Longyang Road subway station). There are no intermediate stops, and the 30km route roughly parallels part of the number 2 subway line. Services run every 15 to 20 minutes between 06:45 and 21:30 and the 7 to 9 minute journey costs ¥50 (about A$10), or ¥40 (about A$8) if you have an airline ticket for that day.