I wonder how this works?

[ToledoRailfan]

I was doing some streetview searching near the North Carolina Transportation Museum, and I came across this crossing, Part of it looks like a Quad crossing but on one side, there is more tracks with one more signal. I'm curious on how a crossing like this would work.

https://www.google.com/maps/@35.671495, ... !2e0?hl=en

https://www.google.com/maps/@35.67139,- ... !2e0?hl=en

https://www.google.com/maps/@35.671298, ... !2e0?hl=en

https://www.google.com/maps/@35.671021, ... !2e0?hl=en

[LARDLOGO]

I'm pretty sure the outer signals activate when a train crosses. If the train is on one track, the other signal activates as well.

[Caltrain927]

I've seen this crossing personally, when a train takes the Piedmont mainline, all signals will go down. If a train diverges onto the "S" line, only the 2 outside signals will activate, with other 3 signals staying inactive. Here's a couple videos to show what I'm talking about.

Train on the Piedmont,
http://youtu.be/ZjfdKJQHOVM?t=6m39s

Train on the "S" Line,
http://youtu.be/ZjfdKJQHOVM?t=10m1s

[Trainzmandude2012]

I would think it would be like Glen Helen Pkwy(Devore Rd.) in San Bernardino

[TommyBNSF]

For anyone wondering, that's the same crossing at this train vs. truck video.

https://www.youtube.com/watch?v=Ub50ai8QAaI

[cabman701]

For anyone wondering, that's the same crossing at this train vs. truck video.

https://www.youtube.com/watch?v=Ub50ai8QAaI

Did not know that, but have seen that video many times. It's the most popular video of all time on Rail-videos.net.

[SirKrunch]

Call me crazy, but wouldn't it just be easier to 4-quad off the entire thing instead? Is it possible for both crossings to be occupied at the same time?

[jff1999]

There is another double-crossing in North Salt Lake Utah with a similar setup except the near track (UP local line) is protected by 2 signals as opposed to the S line where only one signal protects it. The UP mainline and Frontrunner has 4 quad gates. If the UP crosses on the mainline or Frontrunner crosses, all four quad gates to that crossing go down as well as the west local line signal. The east local signal stays up while the lights facing the west flash. When it activates, both outside signals go down first, and then the west UP/FR shoulder signal lowers, and when it's halfway to almost lowered, the quad gates lower. If the UP crosses the local line, both local line gates lower while only the east shoulder signal for the mainline/Frontrunner lowers. The lights facing the east on the east quad signal still flashes. Both west signals of the Mainline/Frontrunner will be completely off (no bells, no lights, no gates). When this activates, it activates the same way as on Glen Helen Parkway/Devore Rd in San Bernadino, CA.

https://www.google.com/maps/@40.8418992 ... 384!8i8192