Siemens have been awarded a contract to overhaul London Buses'
Countdown
system, replacing the current AVL beacon-based technology with
something
based around GPS; there will be enhanced real-time information
available

Is all this reliance on GPS a good idea? If at some point the US
military decides to
scramble or kill the signal (and don't say it won't ever happen, you
just don't know) then
it seems half our infrastructure will now stop working. I can't help
but think this
is incredibly shortsighted.

B2003