From: j.albert@snet.net

On 11/1/16 7:43 PM, hancock4@bbs.cpcn.com wrote:
> I would think if it had been in place, it would've prevented the
> recent Metro North and Amtrak NEC accidents were excessive speed
> was the cause.

You would be wrong, because at both locations where the
above wrecks occurred, there ALREADY WERE cab signals
suppliemented with speed control, and those systems have
been in place for years.

Cab signals and speed control (until the Metro-North
accident) applied ONLY to signal indications (i.e., would
apply brakes if engineman did not take appropriate action
after passing a more restrictive signal indication).

After the Spyten Duyvil wreck, Metro-North installed cab
signal "drops" approaching certain speed restrictions. These
operate independently of signal indications.

The Amtrak Frankford Junction wreck was also a "slowdown"
NOT associated with signal indication, and again, the
existing cab signal/speed control system did not enforce it.

ACSES -- which DOES enforce ALL timetable speeds and
slowdowns, WOULD HAVE prevented it, but ACSES wasn't in
service yet at that particular location.

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