I saw a position light signal today on the CSX (former P&LE main line) that had a circular yellow plate with a black G on it mounted below the signal. Any idea what this indicates?
KL
It’s a “Grade Signal.” A signal displaying red modified with a G plate authorizes a train to proceed at restricted speed without stopping. Grade signals are used on uphill grades to enable a following movement to keep moving, because stopping and restarting on a grade makes trains prone to break-in-twos, as well as the risk that the train may not be able to restart. Grade signals are only used on intermediate (ABS) signals, not absolute signals. ABS are designated with a number plate. ABS signals without a G plate require the train to stop, then proceed at restricted speed. Signals without a G plate or without a number plate are Absolute Signals and may only be passed if displaying an indication more favorable than stop, or with authority from the dispatcher, because Absolute Signals convey authority (whereas intermediate signals only advise of track conditions ahead).
CSX Rule that governs is C-298. See http://www.wvrail.railfan.net/signals/index.html … click on the last link.
S. Hadid
CSX rules no longer require (and haven’t for 8 or 10 years) trains to stop at red intermediate (permissive) signals. Trains may pass red permissive signals at Resticted Speed, without stopping. So, while still in use, the G markers are meaningless, other then to designate a permissive signal.
Nick
If I may borrow the thread for a moment please?
Nick… did you get my E mail about signalling a passenger layout? I’m still having fun with getting back on line.
Thanks for the loan [:D]
Dave