I guess you're asking about the crossing (intersection) of two rail lines, the middle rails at the intersection forming a 'diamond' shape.
http://www.rtands.com/jul00/diamonds.html
If not, we need more info on what you do want to know...
Railroad Forums
Moderator: Robert Paniagua
Otto Vondrak wrote:Here's a list of more "slang."Thank you for this link
http://railroad.net/articles/railfannin ... /index.php
-otto-
David Telesha wrote: There are non-interlocked crossings - so therefore not all are "interlockings". It depends on the territory - Brighton Park is an example of a non-interlocked and a mandatory stop is required.Are you referring to Brighton Park on the CJ in Chicago? It's interlocked, or protected by home signals, but a stop is mandatory regardless of signal indication. I believe Center St. in Youngstown, OH was set up much the same in it's old configuration with movements controlled by the towerman using a colored lamp for each RR involved there. Don't remember the colors.
ACLfan wrote:A diamond without an interlocking:
So, if you see a "diamond without some form of interlocking protection, take a picture of it! ---cause you won't see many of them!
As always!
ACLfan