Sayville 

South Side RR c. 1868

Sayville Map 1900

Sayville Emery Map 1958 MP48-49

Sayville Emery Map MP49-50

Sayville Map 1966

Sayville "Y" Cabin

Temporary “Y” Cabin that was moved west to Lincoln Ave crossing for the grade elimination of Montauk Hwy.  You can see the double track has been truncated and a switch installed just west of the cabin and the crossing.  Photo view is west 1930. Research: Dave Keller Collection: Art Huneke

The double track was reconnected after the project and placed back in service to its original location, and the original cabin was left in situ. Once the project was completed, the tracks placed back in service and the cabin moved to the south side of the tracks, it was re-manned. 

You’ll notice the temporary structure, which dates to the 1930 project is ALSO wearing the keystone call sign as is the original cabin in the c. 1929 view.  It is my opinion that the original cabin in photo #1 was given this sign sometime after the c. 1925 photo was taken.  It was removed and placed on the temporary cabin and, once the project was completed and the older cabin restored to duty, it was placed back on that structure to identify it.  The cabin was permanently placed out of service and removed on 6/7/1939 and a spring switch installed.  It was protected by “PD” signal #16 controlled from “PD” tower effective that date.

Research: Dave Keller/LIRR Historian  

"Y" Cabin east of Sayville c.1925
Photo: James V. Osborne
Collection: Dave Keller

Y" Cabin east of  Sayville c. 1929 prior to the grade elimination project.
Collection: Art Huneke

G.O. Placing temporary “Y” cabin and end of double track out of service and placing the original “Y” cabin and original location of end of double track back IN service  1930
Archive: Art Huneke

Train 4012 Sayville 1-5-80 
Photo: Bob Bender

End CP sign 12/31/07 Photo: Mike McDermet

CP is for crossing predictor, a different signal system being used at Sayville to help manage the length of time the gates are down. 

It provides consistent warning times for crossings under the conditions of varying train speeds. These were installed at several crossing in the Sayville area in the 90's. 

This simply alerts the engineer to the limits of this system in operation. When they had low platforms, the platform extended right up to the crossing. When you pulled in, if you stopped half way in the station, the gates would come up; when you started from the station, about 3/4 of the way through, you would trip the gate circuit and the gates would come down.

The term controlled point is not used on the LIRR, rather they use remote controlled interlocking, etc. For instance, east of Sayville is a point remotely controlled by PD tower where the 2 tracks merge into one, and that is simply called "Y"