wrote

The NextBuses service doesn't appear to be taking a live feed of
the
Countdown information (yet) - it just shows the timetabled
departures
for particular stops - nor does it appear to accept London bus stop

codes (yet).

I think it depends on what Real Time information is available. There
is a
mixture in Cambridge. Some buses show minutes to go, others
timetabled
departure times which means that late running buses without Real Time

information disappear when the due time passes.

Actually this can happen even when Real Time information is available
depending on what accuracy is assumed.

So if this is say 5 minutes a bus reported as 12 minutes late may
disappear 7 minutes after the time table time. A frantic shift to
request reporting at a stop further along the route will show the bus
again.
(observations using http://nextbuses.mobi in North Surrey)

========
09:32 04/09/11
Nextbuses.mobi displayed next 458 to Kingston at Halfway Green W-O-T
"in 20 minutes".

09:37 458 arrived with internal display showing "wheatsheaf lane" (near
Staines/ Laleham and so yes, 20 minutes from where it actually was.).
========

The new "test" countdown system (both stops in Greater London) can give
up when a bus is still "due" at a previous stop and when it's too long
before the next bus (hourly 465 on Sunday).

http://m.countdown.tfl.gov.uk/arrivals/47983

Woodbines Avenue (UN) @ 20:43 - Bus stop code 47983
towards SURBITON OR THAMES DITTON

Sorry no bus information is available for this stop. Please consult the
bus timetable or visit tfl.gov.uk

http://m.countdown.tfl.gov.uk/arrivals/55881

East Lane (UM) @ 20:45 - Bus stop code 55881
towards SURBITON OR THAMES DITTON
Route To Time
465 Dorking due

Live Bus Departures
Buses departing from
East Lane (UM) @ 20:47 - Bus stop code 55881
towards SURBITON OR THAMES DITTON

Sorry no bus information is available for this stop. Please consult the
bus timetable or visit tfl.gov.uk
--

No "feedback" link apparent so no idea if they want any.


--
Mike D