The "fastest" train commercial service can be defined alternatively by a train's top speed or average trip speed. * The fastest train service measured by peak operational speed is the Shanghai Maglev Train which can reach 431 km/h (268 mph). Due to the limited length of the Shanghai Maglev track (30 km)(18.6 mi), the maglev train's average trip speed is only 245.5 km/h (152.5 mph). * The fastest train service measured by average trip speed from 2009 until 2011 was on the Wuhan-Guangzhou High-Speed Railway, where from December 2009 until July 1, 2011, the CRH3/CRH2 coupled-train sets averaged 312.5 km/h (194.2 mph) on the 922 km (573 mi) route from Wuhan to Guangzhou North. However, on July 1, 2011 in order to save energy and reduce operating costs, the maximum speed of Chinese high-speed