In the same respect, your explanation doesn't consider the
traffic congestion caused by a double deck acting like
a sitting duck at a bus stop.
Sure, not all stops will see bendies taking 1/2 the time, for
example, stops where one or two pax are alighting, then yes, it
will take the same time. And sure, not 100% of the time, as there
may be different passenger behaviours, but in general, if you have
a sizable crowd (more than 10), you would realise the bendies
unload way faster. And when you see busy bus stops, thats where it
drops below 50% of the time taken by a DD.
The flow is simple, and I have explained it before, there is
just one entrance on both bendies and double decks, but the double
decks have a choke point at the bottom of the staircase, where
people boarding will have to wait for people coming down from the
upper deck to alight, and only two lanes of flow to exit, of which
there is only one lane of passengers from the upper deck (even
if all 55 people want to alight at the same time, they will have to
form a line before coming down the stairs). And also, the
walk from most of the upper deck to the exit is a long one in
terms of time taken (vis a vis a bendy) and both climbing
up and down the stairs take additional time. So people
get stuck waiting for people to come down, even if they are just
going to the rear of the lower deck, and if they do want to go
upstairs, they will have to form a queue to go up, slows everything
down.
On a bendy, you just have to walk from the seats
to the doors, which are less than half the length of a 12m from the
seats, and there are four distinct lines that can be
formed and while sometimes there may be a wait at
the exits, it isn't a long wait, usually a few seconds before you
get to pass it, especially as there is a standing area opposite the
door which allows pax who've just boarded to overtake the
exiting pax.
I would recommend you to see a situation where congestion have
been caused by double decks where previously didn't exist. Go to
CCK Int during peak now, especially in the morning. Previously with
bendies only, there wasn't that much of a jam (just a short wait,
if there is any), now with the double decks there is a jam, and a
long wait when a double deck is in front of you occupying the
alighting berth even if there was no jam, and if you actually
look at how slow people are coming down the deckers at the
alighting berth, you'd see the clearer picture as to why there is a
jam. Meanwhile the bendies really take less than 1/2 the amount of
time there as compared to double decks, the bendies in this case,
literally come and go.
Same situation at the first pair of bus stops at
Bukit Panjang after BKE, double decks which just dwell at the bus
stops. While bendies just take less than half the time to unload
and load.
so how many bus stops have such situation whereby 55 paxes are
alighting and another 55 paxes want to board the same bus? are u
saying that every bus stop, there will be the same boarding
activities (all the 55 paxes from upper deck will alight and
another 55 will go to upper deck?).. further, if a bendy is packed,
you think it is easy for the paxes to alight and board as well?
still have to wait for the paxes to alight first, before the paxes
inside the buses can move in before BC open the front entrance.. so
the time is roughly the same... you are assuming that the BC will
open the front entrance and there is space between the
entrance/exit for the paxes to board....
further, how many DDs are causing traffic congestion acting like
a sitting duck? are u talking about the NP bus stop? i
usually saw bendy causing congestion, because the tail end protrude
out on the lane, thus all car behind cant pass at all...
as for your CCK interchange example, you have to take into
consideration how many buses have been added since BSEP... and
further so far, only 67/188/190 have DDs, and you really think the
DDs are the factor of causing congestion at CCK interchange?
how many paxes are coming down from the upper deck of
67/188/190 DDs at CCK interchange? without boarding, the paxes can
alight much faster, by using the entrance as well.