Shanghai metro:
 

Smart and modern, trains on Shanghai's new metro line 16 reach up to 120km/h (75 mph).

http://www.bbc.co.uk/news/world-asia-25559413

The line is opening this week, and along with a partial stretch of line 12, it makes the city's metro system the first in the world to cover a total length of more than 500 km (310 miles).