An update by the Land Transport Authority (LTA) & SMRT on 16 November 2017 stated that LTA and SMRT have decided to isolate for up to one month the operations of the Tuas West extension, which runs on the new signalling system, from the rest of the East West line, which runs on the old signalling system, enabling LTA engineers to carry out further assurance checks together with Thales. The train was switching systems when the collision took place. Train service on the line resumed on 20 November, with the Tuas West extension between Gul Circle and Tuas Link using the new signalling system and the section between Pasir Ris and Joo Koon, together with the Changi Airport Branch continuing to run on the old signalling system. Train services between Joo Koon and Gul Circle were temporarily suspended until its resumption on 28 May 2018; between the suspension a free bridging bus service is available between the two stations. Continuous service between Pasir Ris and Gul Circle resumed on 28 May 2018, with the permanent activation of the new CBTC system; since the incident, selected portions of either North South or East West line were to conduct track renewal works with early weekend closures and later station openings.