Late-night commuters aiming for the last train home will need to factor in earlier times at six North-South Line stations from next month.
SMRT is halting services 30 minutes earlier to speed up replacement track works.
The six stations are Ang Mo Kio, Yio Chu Kang, Khatib, Yishun, Sembawang and Admiralty.
The public transport operator will end train services at those stations at 12.30am on Sunday to Thursday nights, from April 15 till the end of October, except on the eve of public holidays.
The earlier closure means the last train to Jurong East will depart Marina Bay at 11.40pm, while the last train to Ang Mo Kio will leave Jurong East at 11.39pm.
This is the first time that SMRT has ended train services earlier for replacement works. Previously, it closed stretches of track on the Circle Line on Sundays for cable replacement.
SMRT said the early closures will allow it to deploy machinery more efficiently to speed up the replacement of 188,000 timber sleepers with concrete ones, which last about twice as long.
It noted that the extra time will also allow other major projects such as upgrading the signalling system and replacing the third rail to be carried out more quickly.
The operator seeks the "support, patience and understanding" of commuters for the early closures, which "will help enhance system reliability and offer smoother rides".
The six stations account for more than 30,000 sleepers - 20 per cent of all sleepers on the North-South and East-West lines, SMRT noted. As of last month, about 13 per cent along both lines have been replaced.
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