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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[BRHSlist\]\s+How\s+does\s+a\s+railroad\s+crossing\s+work\?\s*$/: 3 ]

Total 3 documents matching your query.

1. [BRHSlist] How does a railroad crossing work? (score: 1): Author: "wollffee" <wolfee@onebox.com>; Date: Sat, 11 Oct 2003 08:40:11 -0600; What triggers the lights/bell/crossing gate when a train approaches the crossing? How come when the BNSF approaches the crossing at 80th and Sheridan, NW of Denver, it triggers the crossing a quarter; /archives/BRHSLIST/2003-10/msg00148.html (8,980 bytes)
2. Re: [BRHSlist] How does a railroad crossing work? (score: 1): Author: "Russell Strodtz" <vlbg@earthlink.net>; Date: Sat, 11 Oct 2003 09:31:36 -0500; There are a number of different technologies applied to the activation of grade crossing protection. The simplest ones just put the gates down when ever there is an occupancy in a certain section of; /archives/BRHSLIST/2003-10/msg00150.html (11,965 bytes)
3. Re: [BRHSlist] How does a railroad crossing work? (score: 1): Author: "Steven Holding" <s.holding@charter.net>; Date: Sun, 12 Oct 2003 00:41:50 -0500; Ask fellow member Brandon O How they work or don't work Modern Tech One step forward and two or more back sjh -- Original Message -- From: "Russell Strodtz" <vlbg@earthlink.net> To: <BRHSlist@yahoogr; /archives/BRHSLIST/2003-10/msg00162.html (13,218 bytes)

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