Interlocking Walkthrough: STONY

(Photo: Railfanning Meteorologist Productions)

Since it’s time for school to start up and namesake STONY interlocking is located in Stony Brook near Stony Brook University, I thought this was an ideal time to checkout STONY interlocking on the eastern edge of the Port Jefferson Branch. Like many Port Jefferson Branch interlockings, instead of there being a siding before the station, the station itself is a siding which makes for much more efficient use of time, therefore, STONY is divided into two parts on both sides of the station.

Switches

STONY Interlocking is a very simple interlocking, with STONY 1 splitting the line into 2 tracks west of the station platform, then STONY 2 doing the same to the east. It's located 53 miles away from LIC, making it the second to last interlocking on the Port Jefferson Branch.

STONY 1 (Photo: Tri-State Rail NOW)

Signals

STONY has the old style position light signals, as seen in this photo.

And that's about it for STONY interlocking, which is actually a fairly new interlocking, one that came in service in 1992. I know we've hit a roadbump of some pretty boring programming recently, but we will be getting to more interesting things soon!

Photos: Stony Brook (8/2025)