If very-long
trunk actually needs three parking lots,
This may explain the jams during peak hours at the end-on
section of Boon Lay Bus Interchange.
I guess 16km is the cut-off between long trunk and very-long
trunk.
Boon Lay Bus Interchange (now) has twenty nine bus services and
sixty parking lots, comprising of 22 parking lots at end-on section
and 38 parking lots at saw-tooth section.
If we reserve the end-on berths for only very-long trunks, by
right, there should only be seven bus services, not eleven.
Currently, a bus service at the end-on section only has two berths.
Maybe this explains the jam.
Currently, there are eleven bus services at the end-on section,
of which eight are very-long trunk (30, 79, 154, 157, 174, 174e,
198 and 246).
I would like to recommend moving the three not very-long
trunk (ie. 194, 249 and 252) and one very-long trunk (eg. 79) at
the end-on section over to the saw-tooth section.
Whereas for the eighteen bus services currently at the saw-tooth
section, four are very long trunk (ie. 178, 180, 187, 193). If we
move one very-long trunk (eg. 79) over, this makes five very-long
trunk bus services at the saw-tooth section, and we need a total of
fifteen parking lots at the saw-tooth section for them.
This leaves us with twenty three parking lots (38 - 15) at the
saw-tooth section, for the remaining seventeen bus services. These
seventeen bus services each only need two parking lots, since they
are not very-long (less than 16km). So, we need thirty four parking
lots for them.
There will be a shortage of eleven parking lots (34 – 23), but
this can be reduced to four if we exclude 79, 258 and 405 because
79 and 258 loop at Boon Lay Bus Interchange and 405 only operates
some times. We can change 256 to loop at Boon Lay Bus Interchange,
to reduce the shortage further to two. We can change 192 and 193 to
loop at Boon Lay Bus Interchange, to obtain a surplus of two.
I am not sure if there are bus services that are allocated only
one parking lot, because if so, this means a large part of this
post is wrong.
