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- Newsgroups: rec.railroad
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!agate!rsoft!mindlink!a777
- From: Steve_Hooper@mindlink.bc.ca (Steve Hooper)
- Subject: Auto Gates
- Organization: MIND LINK! - British Columbia, Canada
- Date: Wed, 30 Dec 1992 02:47:21 GMT
- Message-ID: <19010@mindlink.bc.ca>
- Sender: news@deep.rsoft.bc.ca (Usenet)
- Lines: 41
-
-
- > khartman@fnala.fnal.gov writes:
- >
- > I have been interested in the methods used to "lift the gates"
- > while
- > a train is close to a crossing, but not moving. Setups that use the Diesel
- > horn to activate the gates, or a slow moving train/timer.
- >
-
-
- I find this an interesting concept. I have NEVER heard of such a thing....a
- gate that operates off horn sounds. Not to call anyone a liar, but can you
- verify 100% that the whistle is what activates the gates? I just find it
- strange that a noise would work the gates. What would happen if a semi
- pulled up to the crossing and blew his horn?
-
- Perhaps (again, I say perhaps, because maybe I am completely wrong here) you
- are being fooled by a GCP. A GCP is a Grade Crossing Predictor. These are
- fancy gates that instead of having the usual activation block in the rails,
- actually detect MOVEMENT on the rails. Thus, if you are going 10 miles per
- hour, the gates will go down when you are X amount of feet away from the
- crossing. If you are doing 50, they will go down at Y feet from the
- crossing. If you are stopped, they go up. As soon as you start moving
- again, they go down.
-
- Rule books state that two long on the whistle must be sounded before
- movement, so perhaps you are being fooled by the hoghead whistling off, then
- starting to move, and right at that second the gates go down (because the GCP
- detects movement).
-
- As I said, I could be 100% wrong here, but I can guarantee that in all the
- areas of BC and Canada that I have worked, I have never encountered a
- crossing acticvated by a whistle.
-
-
- --
-
- steve_hooper@mindlink.bc.ca [] The Great White North in
- OR a777@mindlink.bc.ca [] Vancouver, BC, CANADA
- Conductor on the Cascade Sub. [] CP Rail
- Opinions are my OWN!
-