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NEC milepost designations

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Posted by timz on Saturday, July 23, 2011 8:21 PM

Dayliner
I'm just a little surprised, from a safety point of view, that there is not a straightforward way of identifying every inch of line along the NEC.

Say they completed the railroad in 1870 or whenever it was. They measure it as best they can and record the milepost location of everything. But we wouldn't be surprised if they were off by ... several inches or a foot per mile, just because they couldn't do better than that. And they're measuring... along the centerline of the double track? So add another track or two on the same side, now the centerline isn't where it used to be-- are they going to recalculate the milepost location of everything along the new centerline? They elevate the railroad above street level-- likely they've shifted the centerline again, not to mention destroying all their fixed survey points in the area.

So before they get around to broadening any curves they've already lost the exact distance. Then they do broaden some curves (or maybe just lengthen spirals, which will have the same effect). Then they rearrange the whole railroad between Zoo and Arsenal (which shifts the mileposts)-- then they rearrange it again a few decades later. That's all before Penn Central comes along-- maybe PC didn't change the RR much, but who knows how much old paper they dumped. Then Amtrak comes along and makes more changes to the railroad.

Some railfans like to think all the information is naturally all on paper in a vault somewhere. There may be a vault, and if we're lucky it's stuffed with bales of info, some up to date and some not, and some unknown percentage that was never right in the first place. The hopefully up to date info doesn't quite agree with the old info-- do we know why? Whoever knew the answer to that retired fifty years ago.

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Posted by henry6 on Saturday, July 23, 2011 2:54 PM

Deggesty

 henry6:

 Deggesty:

Henry, are you sure you want go back to Harold after passing through there on the way from Boston?Smile

 

As a railfan, probably yes.  As a traveler my goal would be Hudson..we H's have to stay together even if not in order.

 

 

Oh Henry! Very good.Big Smile

 

Didn't you ever wonder where the phrase "where the 'H' are we?" came from?

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Posted by henry6 on Saturday, July 23, 2011 7:44 AM

Well every inch of every right of way is registered, designated, and otherwise accounted for, including the Northeast Corridor.  This information is in employee timetables, schedules, books of rules, track diagrams, property and tax maps,  etc. and are for the eyes of employees of the railroads only.  There is no reason to(and many reasons to not) allow the general public to have access to that information. That being said, there is a lot  of this information out there in the hands of railfans.  The information is in a form for the benefit of railroads and their employees; fans want the same information for other reasons than which it is presented.

RIDEWITHMEHENRY is the name for our almost monthly day of riding trains and transit in either the NYCity or Philadelphia areas including all commuter lines, Amtrak, subways, light rail and trolleys, bus and ferries when warranted. No fees, just let us know you want to join the ride and pay your fares. Ask to be on our email list or find us on FB as RIDEWITHMEHENRY (all caps) to get descriptions of each outing.

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Posted by Dayliner on Saturday, July 23, 2011 12:59 AM

Thanks again--the question may not be answered, but I sure learned a lot!  Complicated trackage with a complicated history means there is no simple track designation, obviously.  I'm just a little surprised, from a safety point of view, that there is not a straightforward way of identifying every inch of line along the NEC.

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Posted by Deggesty on Friday, July 22, 2011 11:05 AM

henry6

 Deggesty:

Henry, are you sure you want go back to Harold after passing through there on the way from Boston?Smile

 

As a railfan, probably yes.  As a traveler my goal would be Hudson..we H's have to stay together even if not in order.

 

Oh Henry! Very good.Big Smile

Johnny

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Posted by henry6 on Friday, July 22, 2011 8:52 AM

Dayliner

Thanks so much!  This is certainly filling in some of the gaps in my knowledge.  But my original question is still unanswered--viz., what are the names of the various segments?

There is no real answer, at least not one honed the way you wish. Overall, it has been answered according to Amtrak official operating procedures and documents.  Still there are leftovers from Conrail, Penn Central, New Haven, and PRR offical procedures and documents coupled with coloquialisms and other unoffcial designations.  Each segment has gone through many physical changes since being built plus railroads were prone to move segments on paper from one division or sub or branch or whatever to another...but as I said it was on paper, could have lasted a week or never changed.  A lot is probably simplified for operations sake instead of the NHNR division from New Haven to New Rochelle and NR to HGW from New Rochelle to Hell Gate West and HFWH Hell Gate West to Harold, say, it is just New Haven to Harold on whatever the designation is (not having an Amtrak employees timetable handy). 

RIDEWITHMEHENRY is the name for our almost monthly day of riding trains and transit in either the NYCity or Philadelphia areas including all commuter lines, Amtrak, subways, light rail and trolleys, bus and ferries when warranted. No fees, just let us know you want to join the ride and pay your fares. Ask to be on our email list or find us on FB as RIDEWITHMEHENRY (all caps) to get descriptions of each outing.

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Posted by henry6 on Friday, July 22, 2011 8:41 AM

Deggesty

Henry, are you sure you want go back to Harold after passing through there on the way from Boston?Smile

As a railfan, probably yes.  As a traveler my goal would be Hudson..we H's have to stay together even if not in order.

 

RIDEWITHMEHENRY is the name for our almost monthly day of riding trains and transit in either the NYCity or Philadelphia areas including all commuter lines, Amtrak, subways, light rail and trolleys, bus and ferries when warranted. No fees, just let us know you want to join the ride and pay your fares. Ask to be on our email list or find us on FB as RIDEWITHMEHENRY (all caps) to get descriptions of each outing.

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Posted by Deggesty on Wednesday, July 20, 2011 9:35 PM

Dayliner

Thanks so much!  This is certainly filling in some of the gaps in my knowledge.  But my original question is still unanswered--viz., what are the names of the various segments?

Don't hold your breath; I am afraid that you are going to be disappointed. According to the April 5, 1987 Amtrak timetable: Boston to Washington is the Main Line (the track between New Haven and Division Post (mp 18.8 out from Penn Station over the Hell Gate) is Metro North (formerly NH)), and Philadelphia to Harrisburg is also the Main Line. The names may have changed since 4/5/87.

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Posted by Dayliner on Wednesday, July 20, 2011 9:00 PM

Thanks so much!  This is certainly filling in some of the gaps in my knowledge.  But my original question is still unanswered--viz., what are the names of the various segments?

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Posted by Deggesty on Wednesday, July 20, 2011 5:17 PM

Timz, I at last pulled an Amtrak tt out, to see what it (not my"quick reference," which is a listing of my miles) says.

The lower level of 30th St. is 1.5 miles from Zoo, which is at mp 88.0 on the line from Jersey City. Now, just where on Zoo is not stated--it just notes "Zoo." Penn is also 1.5 miles from Zoo. The next point shown after Penn is Civic--which is 2.3 miles from the suburban station. After Civic is Phil (3.6 mi.), which apparently is a connection to the Harrisburg line for C. R. C. (8-25-86 tt), and then Brill (4.2 mi.), and Darby (6.1 mi.)

The PRR always irritated me because it did not show the distance between stations.

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Posted by timz on Wednesday, July 20, 2011 4:17 PM

Deggesty
As well as I can tell, 30th St. (on the NYC-Washington track) is mp 89.2, and it is mp 1.5 from Broad Street.

You remember we can't have a Broad St milepost on the NEC at 30th St. Upper level 30th St is somewhere around MP1.0 from Broad St, but the River Line downstairs has to be mileposted from either Zoo or Manhattan-via-Jersey City, and it's not clear which it is. Broad St mileposts can't take over until Arsenal or Phil or someplace.

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Posted by Deggesty on Wednesday, July 20, 2011 3:07 PM

timz

Starting from Boston I think the mileposts go like this--

Counting down to Milepost Zero at 42nd St in Manhattan (i.e. a bit south of the end of track at GCT) as far as the junction just west of New Rochelle, then

Counting down to Milepost Zero At NY Penn-- hopefully the same Milepost Zero as they used going west from NY Penn, but who knows. It seems westward Milepost Zero isn't quite midway between 7th Ave and 8th Ave; maybe it was the center of the waiting room?

West from NY Penn the mileposts shift at about 8.6 from NY Penn, jumping back to about 7.2 from downtown NY. There was no actual Milepost Zero downtown; end of track at Jersey City was set at MP 1 exactly.

Hard to say where the next change is-- maybe Zoo, maybe Arsenal-- probably not 30th St. In any case, Arsenal to somewhere near Washington (Washington Union Terminal limits?) is mileposted from Zero at Broad St Philadelphia.

 

 

Timz, I should have given the mileposts at the various places. CP 216 (junction of Hell Gate Bridge line with NY-Boston line) is 16.3 miles from Grand Central, and 18.9 miles from Penn Station. Coming out from Penn Station, Hudson is mp 8.6, and the original line is mp7.1. As well as I can tell, 30th St. (on the NYC-Washington track) is mp 89.2, and it is mp 1.5 from Broad Street. At least there was no change at the point at which you move from the Philadelphia Wilmington and Baltimore to the Baltimore and Potomac, but Broad Street is still the zero mp all the way to the Potomac River.

Now consider the practice followed on other roads, the SP and the Hill roads in particular. If there was a change in actual mileage on the SP, you would find two different mp's at a station--the first one is the new mp after the change, and the second one is the original mp. It's easy to spot these in the employee tt. The Hill roads (NP, GN, & Q, in particular) will show the distance from station to station in the station column--and the sum of these distances is not always the same as the distances indicated by the mile posts; for instance, the distance from Chicago Union Station to Pacific Junction is 475.7 miles--but Pacific Junction is at mp 475.5 (there are many differences along the way, but my quick reference shows the overall, and not the individual differences).

And, you will have an interesting note in a tt, such as the one in the CSX tt with the line from Jacksonville to Tampa that tells you that it is so many feet (0.1 mile is the closest in miles) from mp 768 to mp 771, and the one in the Rio Grande tt that tells you that it is so many feet (0.7 mile is the closest in miles) from mp 393 to 395.

By the way, remember that the NE Corridor does not go through Grand Central, but uses the Hell Gate Bridge, so you have the change near New Rochelle.

While considering lines other than the NE Corridor, I find it interesting that Penn Station is closer to the junction (CP12) with the Grand Central-Rensselaer line than Grand Central is--CP12 is only 10.2 miles from Penn Station, but is 11.8 miles from Grand Central.

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Posted by timz on Wednesday, July 20, 2011 12:57 PM

Starting from Boston I think the mileposts go like this--

Counting down to Milepost Zero at 42nd St in Manhattan (i.e. a bit south of the end of track at GCT) as far as the junction just west of New Rochelle, then

Counting down to Milepost Zero At NY Penn-- hopefully the same Milepost Zero as they used going west from NY Penn, but who knows. It seems westward Milepost Zero isn't quite midway between 7th Ave and 8th Ave; maybe it was the center of the waiting room?

West from NY Penn the mileposts shift at about 8.6 from NY Penn, jumping back to about 7.2 from downtown NY. There was no actual Milepost Zero downtown; end of track at Jersey City was set at MP 1 exactly.

Hard to say where the next change is-- maybe Zoo, maybe Arsenal-- probably not 30th St. In any case, Arsenal to somewhere near Washington (Washington Union Terminal limits?) is mileposted from Zero at Broad St Philadelphia.

 

 

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Posted by Deggesty on Monday, July 18, 2011 3:57 PM

From the Amtrak operating timetable, the mileage segments for the NE Corridor are Boston South Station to CP 216 (near New Rochelle) , CP 216 (via Hell Gate) to Penn Station, Penn Station to Hudson, Hudson to 30th St (Philadelphia), 30th St. through Washington Union Station to Virginia Ave. Even though Metro North owns the track from Grand Central to New Haven, and Amtrak uses Metro North between New Haven and CP216, the mileposts have not been changed.

Henry, are you sure you want go back to Harold after passing through there on the way from Boston?Smile

Johnny

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Posted by henry6 on Monday, July 18, 2011 8:32 AM

You actually are missing several "segments" that make up the Corridor...I believe there is a Boston to New Haven, New Haven to New Rochelle, New Rochelle to Sunnyside, Sunnyside to Penn Sta, Penn Sta to Harold, Harold to Trenton, Trenton to Philadelphia, Philadelphia to Wilmington and Wilmington to Ivy City.  These are different divisions of different railroads of different eras.  I am sure an Amtrak employee or Employees timetable can put them all together for you.  Good Luck!

RIDEWITHMEHENRY is the name for our almost monthly day of riding trains and transit in either the NYCity or Philadelphia areas including all commuter lines, Amtrak, subways, light rail and trolleys, bus and ferries when warranted. No fees, just let us know you want to join the ride and pay your fares. Ask to be on our email list or find us on FB as RIDEWITHMEHENRY (all caps) to get descriptions of each outing.

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NEC milepost designations
Posted by Dayliner on Sunday, July 17, 2011 10:01 PM

I'm learning something about the complex history and ownership of the line we usually refer to as the "Northeast Corridor", that it wasn't built as such and is a knitting-together of many former lines.  I understand that the mileposts on the route do not run consecutively from one end of the line to the other.  As far as I can determine, the NEC is divided (in terms of milepost numbering) into four sections: Boston-New York (the former NYNH&H and predecessors); and New York-Philadelphia, Philadelphia-Landover and Landover-Washington (the former PRR and predecessors).  What is the designation of each of these line segments today?

Thanks in advance!

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