502A: AM Peak is 6th, 7th, 8th trip of the day. 2 trips for
evening peak.
502B: 2 trips in AM Peak only.
Apparently, last trip of 502 on weekdays from Orchard Road is
9.42pm, Saturdays/ Sundays is about 10.54pm.
518A is the 3rd, 4th, 5th trip of the day from Pasir Ris
Interchange in AM Peak. and 2 more trips in the evening
518B has 2 trips in AM Peak only, 2 trips in evening
Last bus departs Moulmein Road on 1200am on Saturdays and Sundays
only