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Discussion of the past and present operations of the Long Island Rail Road.

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 #1522682  by MattAmity90
 
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.
 #1522698  by MattAmity90
 
Backshophoss wrote: Wed Oct 16, 2019 7:16 pm A link to the pics please!
Flickr.com and in the search box type in "LIRR".
New BRENT 41.3-41.7 by Edward Hand.
New BRENT 41.3-41.7 by Edward Hand.
48907213616_1b6b5a23da_c.jpg (199.93 KiB) Viewed 3515 times
 #1522729  by MACTRAXX
 
MA90: NO Ronkonkoma Branch trains regularly originate/terminate at Brentwood.

Trains have originated or terminated at Brentwood during track work programs affecting Central Islip
and Ronkonkoma - this was done at times for example during the Second Track Program construction.

One AM Peak train originates at Central Islip (#2017 at 6:54 AM) which is the only train that does not begin
at either Ronkonkoma or Farmingdale. For the record #2017 deadheads west to CI from Ronkonkoma Yard.

MACTRAXX
 #1522734  by MattAmity90
 
They also haven't specified whether this siding will be a permanent or temporary installation, or whether it will be electrified or not. All that is evident are the two switch points, and the rails laid out on the ground between Track 1 and the power lines.
 #1522841  by gamer4616
 
This will be Brentwood Double Ended Freight Track.

It will be a non electrified freight siding. It will not be a part of an interlocking. Switches will be electric lock switches.
 #1522853  by MattAmity90
 
When you say electric lock switches and the fact that this is going to be a non-electrified freight siding, are talking about what we have near Pilgrim just to the East of Deer Park under the Sagtikos Parkway bridge? I know that electric lock switches are not controlled by a dispatcher, and are not computer programmed like the crossover switches we are used to talking about.
 #1522864  by krispy
 
MattAmity90 wrote: Fri Oct 18, 2019 9:51 pm When you say electric lock switches and the fact that this is going to be a non-electrified freight siding, are talking about what we have near Pilgrim just to the East of Deer Park under the Sagtikos Parkway bridge? I know that electric lock switches are not controlled by a dispatcher, and are not computer programmed like the crossover switches we are used to talking about.
Not quite true, as EL switches are tied into the signal system. Some may be directly controlled by the tower, others indirectly. If there's a route displayed into the block where the EL switch is, the switch will NOT unlock. Usually the operator has to do certain things in the tower before giving someone permission on the unlock, or it won't work. If the switch is tampered with or has an issue it will drop the code and alert both signal and the operator. Even in manual block Uncle Sam wants something to alert the engineer as to the condition of a switch and may require something like a DSI (distant switch indicator) in systems with commuter operations or high MAS. This is different from an interlocked switch which are directly controlled by the operator.
 #1522947  by Backshophoss
 
That will be in the ETT if the EL is uncontrolled,with the amount of time that must pass to get the unlock.
 #1523115  by Kelly&Kelly
 
Even in manual block Uncle Sam wants something to alert the engineer as to the condition of a switch
Krispy touches on a serious point. There have been a few monumental wrecks and lives lost due to vandalized switches on high speed portions of main track. When an electric lock switch isn't controlled by an interlocking, it often has a time delay, to prevent it from being opened immediately after being unlocked. Unlocking the switch will drop the signal and/or the speed control code. A time delay starts which delays when the points can be thrown. That time delay gives a train that passed a controlled signal or entered the ASC block the necessary time to slow before encountering the switch.

Some electric lock switches require a train to be on a very short approach circuit before the time delay can run. This assures that a train has stopped before the switch points can be opened.
 #1523166  by Backshophoss
 
If there's an island circuit that must be active,that would be noted in the ETT as well,if any of the mainline blocks are shunted,NO unlock!
 #1523903  by MattAmity90
 
Saw Little Giants and TC equipment on Track 1 in Hand's photos. CWR has been sitting there for a while, and I'm pretty sure that once again Track 1 is out of service from CI to JS. I haven't seen any ballast dumpers yet.
 #1524209  by PeteJP
 
I jsut saw a few youtube videos from the cab going thru here. It looks like they have interlockings and signal between Pilgram and Pine-Aire (not sure of the official name here) Also what is the name of the freight yard that straddles the Sagtikos Parkway.

Thank you
 #1524314  by ExCon90
 
Technical question: if trains are permitted to clear at an EL, non-interlocked siding, can Rules 251, 261, or 562 be in effect in that territory? And if so, how does the train get authority to leave the siding later?
 #1524328  by MACTRAXX
 
Everyone:

On Saturday and Sunday November 9-10 all Ronkonkoma Branch trains will originate and terminate at
Brentwood for track work between Brentwood, Central Islip and Ronkonkoma. Bus service will operate
between Brentwood, Central Islip and Ronkonkoma. Expect up to 40 minutes of additional travel time.

Ronkonkoma-Greenport train service will operate with bus transfers to/from Brentwood at Ronkonkoma.

MACTRAXX