I hope this explanation will help you. lol
Before Sv 578 was introduced and one of the 119 bus was used for
the X-over, the structure was like this:
1A/5P> SBS2781S
2A/6P> SBS9298A(DD)
3A/7P> SBS9501M(DD)
4A/8P> SBS2688D
9S> SBS9662G(DD)
10E> SBS593G
When the service start operation at 0530, the first round for
1A to 3A will not have many people taking the bus, the crowd
start to come in from 9S(fourth bus), 4A,
10E onwards..... The frequency will be around 11-13mins. After
0830 hrs, the no. of buses dropped to 5 buses as 10E will go back
to depot. After 1030 hrs, the no. of buses dropped to 4 buses as 9S
will go back to depot. At around 1130-1200hrs, the no. of buses
will increase to 5 buses as 10E come back. At around 1530 hrs,
the no. of buses will increase to 6 buses as 9S come back. At
around 1850hrs, the no. of buses will drop to 5 buses as 10E will
go back to depot and at around 1930-1940hrs, the no. of buses will
drop to 4 buses as 9S will go back to depot.
From what I experienced, the first round for 10E, second round for
1A,2A,3A,9S and 4A will experience good riderships
(during the school peak hours)
After Sv 578 was introduced, one of the 119 buses is used for
the X-over
1A/4P> SBS593G
2A/5P> SBS2688D
3A/6P> SBS9298A(DD)
7S> SBS9662G(DD)
8E> SBS9501M(DD)
X-over bus: SBS1977B
From next week onwards:
1A/4P> SBS9298A(DD)
2A/5P> SBS593G
3A/6P> SBS2688D
7S> SBS9501M(DD)
8E> SBS9662G(DD)
X-over bus: SBS1977B
When the service start operation from 0530 during weekdays,
1A will start first followed by 2A,
7S, the X-over bus, 3A and finally 8E. After around
0830hrs, the number of buses will drop to 5 buses as 8E go back to
depot. At around 1000+hrs, the no. of buses will drop to 4 buses as
the X-over bus will do Sv 578. At around 1130hrs, the no. of buses
will stay at 4, as 7S will go back to depot and 8E will come back.
At around 1500+hrs, the no. of buses will increase to 5 buses as 7S
come back. At around 1730 hrs, the no. of buses will increase to 6
buses as the X-over bus will come back and do on Sv 119. At around
1830-1850 hrs, the no. of buses will decrease to 5 buses as 8E will
go back to depot. At around 1930 hrs, the no. of buses will
decrease to 4 buses as 7S will go back to depot.
Saturday and Sunday/PH schedules are different from the
weekdays.