Pale blue "lunar" signal indicates grade crossing signals operating?

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Robert Gift

former OL presenter
http://maps.google.com/maps?f=q&sou...83&ll=27.768773,-82.649996&spn=0,0.01781&z=16

Atop the north cantilever signal mast pipe. (Upper left in the GooglEarth photo.)
Have never seen this before.
Its lens appears to be a PALE blue, not rich BLUE.

The same signal appears atop the south cantilever crossing signal. (That cantilever crossing signal is now gone.)

Did it flash? - connected to one of the (o)=(o) circuits?

Did these signalso have lower (o)=(o) on their masts?

Thank you.
 

roee

Active Member
The new commuter railroad in Salt Lake City added these indications to it's side of the crossings. What it does is once the gates are fully down they light a white light along the ROW. I wouldn't call it a lunar since that is a signal aspect, but it just shows that the gates are down and horizontal. I'm not sure what the procedures are if it isn't lit, but they move at a decent speed so they aren't going to stop. Maybe it's all set up for a quiet zone and then they'd blow their horns.

These signals are mounted on the gate mech mast, not on top of the cantilever like in your photo. I would guess in your photo it actually is a wayside signal.
 

Robert Gift

former OL presenter
... I would guess in your photo it actually is a wayside signal.
Thank you, roee.
What is a "wayside" signal?

At every downtown grade crossing, one of the signals had a clear glass dome light extending above the crossing signal. ("Mee-mool" lights is what I named the crossing signals as a little boy.)
Maybe it was on the silver/gray relay cabinethat I found a wooden knob switch. When I pulled it, the crossing signals for that crossing activated.
The clear glass dome light flashed in time with the crossing signals. http://www.bing.com/maps/explore/?o...&alt=-10.59&z=30&h=3.8&p=9.1&cz=0.99&pid=5082


On this crossing, it would be difficult for thengineer to discern thathe crossing signals were operating because side ports in the (o)=(o) do not face the track. So that may be why those signals are on the cantilever masts.

I believe that every crossing had a manual switch.

With crossings EVERY block and being only a block apart, would all of their grade crossing signals have been manually operated? Otherwise one locomotive or parked railcar may keep several crossings activated.

Thank you.
 
Last edited by a moderator:

BNSFEng

Locomotive Engineer!!!
http://maps.google.com/maps?f=q&sou...83&ll=27.768773,-82.649996&spn=0,0.01781&z=16

Atop the north cantilever signal mast pipe. (Upper left in the GooglEarth photo.)
Have never seen this before.
Its lens appears to be a PALE blue, not rich BLUE.

The same signal appears atop the south cantilever crossing signal. (That cantilever crossing signal is now gone.)

Did it flash? - connected to one of the (o)=(o) circuits?

Did these signalso have lower (o)=(o) on their masts?

Thank you.
We have a white light on the crossing bungalow that let us know that the AC power was on. If it is off then the crossing is on battery back up power and the dispatcher needs to be informed. Have you seen these lights in operation? If they are on always then it could be a power indicator. I did not see a light on the crossing control box. It appears these tracks indeed do not seem used anymore, though.
 

Robert Gift

former OL presenter
We have a white light on the crossing bungalow that let us know that the AC power was on. If it is off then the crossing is on battery back up power and the dispatcher needs to be informed. Have you seen these lights in operation? If they are on always then it could be a power indicator. I did not see a light on the crossing control box. It appears these tracks indeed do not seem used anymore, though.
The rails are paved over at a grade crossing farther up the track.
And the right cantilever signal is gone. It appears in an earlier GooglEarth image.
 




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