In a message to ALEC CAMERON dated 08-05-97 SCOTT PITCHER wrote:
 SP> Is it true that they still use manual staff exchange for safe-working on
 SP> the NSW north coast main line? I thought that kind of ancient technology
 
 AC> I do not know. But ancient technolgy, can sometimes be the most
 AC> appropriate. That line has a very low traffic density, and there have
 AC> been serious vandal attacks on signalling instruments.
 SP> Ok, I just saw this in a picture in June 1997 Digest. The driver of a
 SP> north bound NR freight train is exchanging the staff with a south
 SP> bound XPT. There are a few places in Victoria where this still
 SP> happens. One of them is the northern end of the metropolitan Upfield
 SP> line, although that is soon to become history.
 In the US this is now done by radio - it's called "Block
 Authority and Release".
 === PMK ===
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