[Scan-DC] Does metrorail have anti-collision equipment?

[Albert LaFrance]

This might be of interest - it's the NTSB report on the Jan. 6, 1996
Metrorail collision.  It includes a discussion of the signaling system
that's under investigatioin in the recent accident:
http://www.ntsb.gov/publictn/1996/RAR9604.pdf

Albert LaFrance

>-----Original Message-----
>From: scan-dc-bounces at mailman.qth.net 
>[mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of Cathy Drzyzgula
>Sent: Monday, June 22, 2009 10:07 PM
>To: cohenner at gmail.com; 'W4NNG'; 
>scan-dc-bounces at mailman.qth.net; Scan-DC at mailman.qth.net
>Subject: Re: [Scan-DC] Does metrorail have anti-collision equipment?
>
>I find it interesting that Metro has announced all trains will 
>be running in manual mode tomorrow.  It almost sounds like 
>they suspect a problem with the automatic system.  They were 
>single tracking due to an incident earlier in the day.  Latest 
>report is one train was stopped waiting for permission to 
>clear the station and the other ran into it from behind.  Of 
>course the front and back of the trains are pretty much the 
>same, so the main difference between this and a head-on 
>collisions would be the somewhat lower impact speed.
>
>
>Cathy 
>
>-----Original Message-----
>From: scan-dc-bounces at mailman.qth.net
>[mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of 
>cohenner at gmail.com
>Sent: Monday, June 22, 2009 8:54 PM
>To: W4NNG; scan-dc-bounces at mailman.qth.net; Scan-DC at mailman.qth.net
>Subject: Re: [Scan-DC] Does metrorail have anti-collision equipment?
>
>Yes, it does. However, in certain situations, it may be 
>necessary for the operator to run the trains in manual 
>operation. I would be willing to bet someone didn't adhere to 
>the signal. Rumor is that they were running single tracking in 
>that stretch of track due to a previous problem, which had 
>been cleared moments before. 
>
>David
>
>
>
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