On 12 Apr, 02:15, Ernst S Blofeld
wrote:

MarkVarley - MVP wrote:
I have no idea what they're called, the LED signs in some bus stops
that tell you how long the busses are supposed to be, my question is,
how do they work? how do they update?

A few times I've seen that my bus is due next in a couple of minutes
but it just doesn't arrive, several later busses come and then it
vanishes off the sign, abducted by aliens?

If you read through the archives of this newsgroup you will find similar
statements and much gnashing of teeth. The classic is the bus coming in
the other direction showing up on the display or, during the night, the
bus travelling at much greater than expected speeds and thus the 10
minute allowance for a juicy kebab turns into a rapid dash, without any
greasy and dubious sustenance.

All in all, Countdown is a disappointing experience and while iBus
promises much greater accuracy, it will no doubt lull the average
traveller into a false sense of security much as the present system
does. It would be good if the displays could correct for inaccuracy,
and calculate averages depending on the day and time, well within the
capabilities of even the most modest microcontrollers, but they won't.
Instead, vague promises of an impending bus will remain long after it
has left or will appear well in advance of the actual reality.

ESB

Yeah, you're right, you might as well just give up, there's no point
in trying to make anything better whatsoever. In fact they might as
well give up on running buses, anyone who needs to get anywhere should
just get a car. I can't see any problem with that idea.