Like other Port Jefferson Branch interlockings, the two different parts of POST used to be known by different names. From December 1963 until October 1977, the interlocking to the west of the station platforms was designated HARE interlocking, named after retired LIRR conductor James Hare.
When doing some research for this post, I noticed that there were two sets of "in service" dates listed for HARE interlocking. The interlocking was in service from December 20, 1963 to August 26, 1981, then it was in service again from September 14, 1971 until it was renamed POST 1 on October 3, 1977. For some strange reason or another there was a 20-day period in the late summer of 1971 where the interlocking was not in service. I haven't a clue why the interlocking would have been taken out of service just to be put back in a couple weeks later, but I'll see if I can track down some answers and report back.
Nonetheless, on October 3, 1977, HARE interlocking fell victim to simplification, and the two minor interlockings to either side of the station were renamed POST 1 and POST 2.
POST interlocking, which originally went into service on December 20, 1963 along with HARE, was originally to the east of the station. POST interlocking is named after retired signal department circuit engineer Howell B. Post.
The pair of interlockings themselves are simple in form. On the west side of the station POST 1 contains a switch that allows trains from Kings Park and points west to come off a single track and go onto either of the station tracks. POST 2 does the exact opposite and takes trains from the two station tracks and shoves them down into one track for the trip further east.
From the very beginning of POST and HARE's existence on the LIRR their switches were remoted to DIVIDE tower in Hicksville where the movements through the interlocking are controlled there.
The signals at POST interlocking are still the older-style position light signals that are slowly fading away on the railroad. To the west of the station in POST 1, the signals are on gantries. To the east of the station I think they are dwarf signals (due to the proximity of the crossing), but I cannot be sure, it's been quite a while since I've been up this way on the LIRR. You can see the signals that control POST 1 interlocking in the photo above.
That just about wraps up this week's interlocking walkthrough. Join us again next week when we unravel the crazy and hectic QUEENS interlocking!