"Nick Finnigan" wrote in message
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"iantheengineer" wrote in message
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"Nick Finnigan" wrote in message
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"iantheengineer" wrote in message
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"Nick Finnigan" wrote in message
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Well, I hadn't mentioned throughput, but what would
you expect the maximum PT throughput per lane to be?

But if they have to stop to pick up customers,
what is the achieved passenger throughput?

You cant really say this globally as it depends upon the density of
stops,
the number of people alighting etc.

You are free to choose the optimal density of stops,
but please explain what that is. For simplicity, I would
go with your assumption that everyone alights at the
city-centre bus-station near their office.

. Say a bus achieved
1/3 capacity of 72 sealts ie 24, and they have a lane capacity of 900
buses
per hour you are talking 21600 passenger throughput, taking out say 15
minutes of the hour

Even at a bus every 5 seconds I don't see how you
can pick up any passengers; if any bus actually stops,
all the following buses would have to.






The same argument can be used for any mode though if a single lane with no
overtaking is installed as all traffic will be delayed due to stops by any
vehicle. This is why we have bus laybys in many places to prevent this.You
could argue that the car is less effective at this as it stops and can only
let a maximum of 4 people off before resuming the journey. A bus stops in
only a slightly longer timestep and can let a maximum of 72 people depart,
before it can set off So effectively you have the stop the depart and the
set off elements to measure. The stopping and departing are going to be
similar with a couple of extra seconds for the bus, but the efficiency of
the stop is far greater allowing a greater passenger per second exit ratio.

It is known that the bus service always seems to operate on no buses for
ages then a fleet come along at once and this is due to the fact that people
alighting on the first bus delay it so that the headway between it and the
following bus reduces, and so on until the first bus is full and perhaps
skips a few stops, and then the second bus will take over until the first
bus is able to stop again. But if the system were saturated the first bus
would load up and set off then the second would load up and set off and so
on, and the headways would remain overall similar with smaller variation.