Was looking at Edward Hand's photo documentation. While the rails and ties have been replaced from Pond Road Westward, two switch heads were installed on Track 1 just before a WB train enters Brentwood. Both are located in between the station and Islip Avenue, and it looks like the heads are half a mile apart. They are calling it NEW BRENT. There is enough room between Track 1 and the power lines. I'm guessing that this will be a siding perhaps for freight or even an electric? I mean some trains do originate and terminate at Brentwood.
This station is Babylon, this is the train to Penn Station. Stopping at: Lindenhurst, Copiague, Amityville, Massapequa Park, Massapequa, Seaford, Wantagh, Bellmore, Merrick, Freeport, Baldwin, Rockville Centre, Lynbrook, Valley Stream, Jamaica, Kew Gardens, Forest Hills, Woodside, Penn Station.