Line 16 so far is the only line in the Shanghai Metro planned to feature different stopping services, with an express service stopping only at Longyang Road, Luoshan, Xinchang, Huinan, and Dishui Lake Stations. After January 30, 2014, due to insufficient rolling stock and overcrowding of the line, all express services where suspended. These measures allowed local train headways to shorten from every 20 minutes to 10 minutes. Once sufficient rolling stock has been acquired then express services will resume. In addition, to further increase capacity, the existing 3 car train sets will be expanded to full 6 car sets by the end of 2015. Express services resumed in March 21, 2016. In addition, the rush hour headway was reduced to a minimum of 4 minutes and operated with a mixture of 6 car and 3 car trains.