In the PRR signal chart a few posts back the rectangular dwarfs that look like dominoes are Chicago Union Terminal signals. I don’t know for sure whether Amtrak has retained them.
Here’s the NORAC signals:
This particular chart doesn’t show the B&O CPLs with their modifying lamps above and below. There are still a few in service.
One place where “pot” signals were often found was in double-track territory (or other directional track running), where they governed any movement against the current of traffic. Our little stretch of railroad here had them until CTC was installed in the late 1980s or early 1990s. I’m surprised they didn’t get buried in the ballast from time to time.
The “semaphore” dwarf signals (blade on a metal disc) were also at the CNW Chicago Passenger Terminal (I think it may have become Ogilvie before those things disappeared). They were supplanted by the LED lights in the photograph we commented on earlier. Those signals, in either incarnation, are merely switch position indicators, and convey no movement authority.
That’s interesting; when did that change? If the signals do not convey authorization, then from where does movement authorization originate?
Back in my day (before the fancy LED’s), those little rotating signals between Bridge “A” and the depot (all controlled by the Lake Street tower) were authorization but not switch position indicators.
There is a dwarf signal at the exit of the center passing track on the UP Line over Soldier Summit Utah. This location is about 8 miles East of Soldier Summit. Called Kyune on the USGS quad. This signal is a new signal, ( last 6-8 years ? )
The old Denver Rio Grande used dwarf signals as exit signals out of passing sidings, but UP is replacing these with tall mast signals.
I wanted to post a picture, but photobucket doesnt work anymore
Steve
It appear to me Photobucket has slit their own throat.