Re: Lightning Strike @ Dandenong

["Richard Flinders" <srv@omni.com.au>]

>All the Signalling at Dandenong and down to Cranbourne hangs off the SSI at
>Dandenong, with the field equipment communicating with the SSI via a
trackside
>data link.  The problem is, if the data link is damaged, all of the
Signalling
>fails.  With Relay interlocking, each location has its own relay room, with
data
>links used for control and indication only.  If the ATC to Cranbourne had
been
>done with small local single processor interlockings (eg Westrace or VPI)
at each
>location, the effects of lightning would be localized.  Even if the Remote
>Control system was destroyed, local emergency keyswitches (like the Western
CTC)

Westrace has proved to be very robust in Indonesia where the lightning is
far more spectacular!