Not forgetting SBST service 157, it uses Volvo Super Olympian as
a sub bus during weekends. Service 88 uses it once too.
You can refer to http://sgforums.com/?action=thread_display&thread_id=39893
for more information.
9800A - Svc 511 on weekdays , weekend Svc 111, 502
9801-9807 -- Svc 28
9808-9810 -- Svc 76
9811-9814 -- Svc 21
9815-9819 -- Svc 56
9820-9828 -- Svc 25
9829-9831 -- Svc 31
9832-9836 -- Svc 72
9837-9838 -- Svc 70
9839-9841 -- Svc 133
9842-9845 -- Svc 161
9846-9849 -- Svc 168
