## Turn Table (current)

*<updated 5/24/2016 for new schedule>*

Outbound trains 'turn' at Framingham or Worcester to become inbound trains. Knowing this, we can use the lateness of a outbound train to predict the lateness of an inbound train. Or worse yet, we can understand which inbound train will be cancelled if an outbound train is cancelled. The entire explanation with more detail is below this table.

The current "Turn Table:"

500, 502, 504 & 508 originate in Worcester from layover yard (see explanation below)

501 becomes 506 (Worcester turn, 24 minutes)

581 becomes 580 (Framingham turn, 15 minutes)

583 becomes 582 (Framingham turn, 32 minutes)

503 becomes 510 (Worcester turn, 23 minutes)

552 uses the equipment from 500. After arriving in Boston, 500 'deadheads' back to Worcester to become 552

585 becomes 584 (Framingham turn, 18 minutes)

505 becomes 512 (Worcester turn, 16 minutes)

587 becomes 586 (Framingham turn, 30 minutes)

507 becomes 514 (Worcester turn, 23 minutes)

509 becomes 516 (Worcester turn, 20 minutes)

511 becomes 518 (Worcester turn, 51 minutes)

515 becomes 522 (Worcester turn, 15 minutes)

517 becomes 524 (Worcester turn, 36 minutes)

589 becomes 588 (Framingham turn, 15 minutes)

519 becomes 526 (Worcester turn, 13 minutes)

591 becomes 590 (Framingham turn, 13 minutes)

521 goes to the layover yard in Worcester (becomes 508 next morning)

593 becomes 592 (Framingham turn, 58 minutes)

523 becomes 528 (Worcester turn, 15 minutes)

525 goes to the layover yard in Worcester (not sure about this one. Either 525 or 551 deadheads back to Boston)

527 becomes 530 (Worcester turn, 15 minutes)

529 becomes 532 (Worcester turn, 16 minutes)

551 deadheads back to Boston (not sure about this one. Either 525 or 551 deadheads back to Boston)

531 becomes 534 (Worcester turn, 20 minutes)

533 goes to the layover yard in Worcester

535 becomes 536 (Worcester turn, 15 minutes)

537 becomes 538 (Worcester turn, 20 minutes)

539 goes to the layover yard in Worcester

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Explanation:

First of all, we need to get some definitions out of the way:

"Set" (as used in this post) = one train set, consisting of a locomotive and coach cars. Also known as a "consist."

"Turn" = the process of changing one set from an outbound to an inbound (or vice versa) train.

"Non-revenue" (also known as "deadhead") = movement of a set from one place to another, BUT without passengers. A non-revenue move is a regularly 'scheduled' move with specific times, but isn't on the public MBTA schedule (it IS on the employee timetable). Non-revenue moves also don't show up on the GPS tracking apps.

"Layover" = overnight 'parking' for a set on a dedicated siding where it can be plugged into ground power. At the current time, the Worcester MBTA yard has capacity to layover 4 sets. No sets currently layover in Framingham or anywhere else on the line.

With the new 5/23/2016 schedule, the Framingham-Worcester line has been assigned eight sets. Those eight sets stay on the line throughout the day. However, due to the complexities of mid-day set storage (as well as inspection & maintenance), it isn't really possible to figure out which sets turn for which at South Station.

However, at Framingham and Worcester, the turns are very predictable and can help us understand delays. The list above notes the location of the turn and the duration of the turn (the difference between the scheduled arrival time of the outbound train and the scheduled departure time of the inbound train). The duration of the turn can help us understand the impact of a delay. For example, if train 515 is only delayed 5 minutes, it might not delay the schedule of 522. But if 515 is delayed 30 minutes, it will almost certainly delay the schedule of train 522.

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*Old turn table for the 12/14/15 schedule below. No idea why I'm saving it but I couldn't just delete it...*

500, 502, 506, and 508 originate in Worcester after 'laying over' through the night

501 becomes 504 (Worcester turn, 10 min)

581 (non-revenue) becomes 582 (Worcester turn, 12 min ***SEE NOTE BELOW)

503 becomes 512 (Worcester turn, 22 min)

505 becomes 516 (Worcester turn, 13 min)

507 becomes 510 (Framingham turn, 11 min)

509 becomes 514 (Framingham turn, 12 min)

511 becomes 518 (Worcester turn, 16 min)

513 becomes 520 (Worcester turn, 19 min)

515 becomes 522 (Worcester turn, 24 min)

517 becomes 524 (Worcester turn, 24 min)

519 becomes 526 (Worcester turn, 37 min)

521 becomes 528 (Worcester turn, 12 min)

523 becomes 532 (Worcester turn, 25 min)

525 becomes 530 (Framingham turn, 52 min)

527 terminates in Worcester (lays over, usually becomes 508 equipment next AM)

529 becomes 534 (Framingham turn, 32 min)

583 goes back into Boston as 584 (non-revenue)

531 terminates in Worcester (lays over, usually becomes 506 equipment next AM)

533 becomes 536 (Worcester turn, 10 min)

535 becomes 538 (Worcester turn, 13 min)

537 becomes 540 (Worcester turn, 35 min)

539 terminates in Worcester (lays over)

541 becomes 542 (Worcester turn, 10 min)

543 becomes 544 (Worcester turn, 10 min)

545 terminates in Worcester (lays over)

***581 is a non-revenue move that departs Boston at 4:45 AM and arrives in Worcester at 5:53 AM. These times can be helpful for us...theoretically, if it is after 4:45 AM and MBTA / Keolis has NOT cancelled 582, there is a good chance it will operate, since the equipment has probably left Boston en route to Worcester. That theory is only partially true since the following things could happen:

1) MBTA / Keolis decides to delay sending out the cancellation notice for 582.

2) 581 might break down somewhere between Boston and Worcester or in Worcester.

3) If some other layover equipment in Worcester is dead, MBTA / Keolis may decide to use the 581 / 582 equipment from Boston as a different train. I'm not sure that this has or would ever happen, but it is a possibility.

500, 502, 506, and 508 originate in Worcester after 'laying over' through the night

501 becomes 504 (Worcester turn, 10 min)

581 (non-revenue) becomes 582 (Worcester turn, 12 min ***SEE NOTE BELOW)

503 becomes 512 (Worcester turn, 22 min)

505 becomes 516 (Worcester turn, 13 min)

507 becomes 510 (Framingham turn, 11 min)

509 becomes 514 (Framingham turn, 12 min)

511 becomes 518 (Worcester turn, 16 min)

513 becomes 520 (Worcester turn, 19 min)

515 becomes 522 (Worcester turn, 24 min)

517 becomes 524 (Worcester turn, 24 min)

519 becomes 526 (Worcester turn, 37 min)

521 becomes 528 (Worcester turn, 12 min)

523 becomes 532 (Worcester turn, 25 min)

525 becomes 530 (Framingham turn, 52 min)

527 terminates in Worcester (lays over, usually becomes 508 equipment next AM)

529 becomes 534 (Framingham turn, 32 min)

583 goes back into Boston as 584 (non-revenue)

531 terminates in Worcester (lays over, usually becomes 506 equipment next AM)

533 becomes 536 (Worcester turn, 10 min)

535 becomes 538 (Worcester turn, 13 min)

537 becomes 540 (Worcester turn, 35 min)

539 terminates in Worcester (lays over)

541 becomes 542 (Worcester turn, 10 min)

543 becomes 544 (Worcester turn, 10 min)

545 terminates in Worcester (lays over)

***581 is a non-revenue move that departs Boston at 4:45 AM and arrives in Worcester at 5:53 AM. These times can be helpful for us...theoretically, if it is after 4:45 AM and MBTA / Keolis has NOT cancelled 582, there is a good chance it will operate, since the equipment has probably left Boston en route to Worcester. That theory is only partially true since the following things could happen:

1) MBTA / Keolis decides to delay sending out the cancellation notice for 582.

2) 581 might break down somewhere between Boston and Worcester or in Worcester.

3) If some other layover equipment in Worcester is dead, MBTA / Keolis may decide to use the 581 / 582 equipment from Boston as a different train. I'm not sure that this has or would ever happen, but it is a possibility.