London Banter - View Single Post - iBus. The most annoying thing about bus travel...

Barry Salter · January 29th 08, 12:12 AM posted to uk.transport.london

wrote:

It is possible along any bus route to see small grey boxes atop a
post, which sometimes have a bright yellow sticker attached to them.
Every time a bus passes one of those posts, it sends a signature
signal to the control centre, which in turn allows the control centre
to know busses' locations at all times. I also undertsand that there
is a large screen in the command centre that can see busses'
movements.

Those are for the original Countdown system which, if memory serves,
averaged the time taken for the last three buses to cover a certain
stretch to predict waiting time.

iBus features GPS tracking, updated every 30 seconds or so, to keep
track of where the bus is, thus providing much more accurate information.

HTH,

Barry