 On 31 May 2014 a north bound "Deyata Kirula" intercity express train hauled by S11 - 902 and the Colombo bound "Rajarata Rejini" train hauled by Class M2 - 570 collided together in the Pothuhera railway station near Kurunegala injuring 68 people and causing serious damages to the both trains and the track.This has been considered as the most damage valued accident for Sri Lanka Railways

The S11 DMUs are primarily operated on the Coastal line, connecting Colombo, Galle, and Matara.The sets are used on the Ruhunu Kumari, Vavniya ICE and several other suburban trains.