TD Berths

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A train describer 'berth' usually, but not always, represents a signal. Train descriptions pass from berth to berth to show the movement of trains through a train describer area. Berths are referenced by four-character alphanumeric names:

Berth Name Description
[0-9][0-9][0-9][0-9] Numeric berths usually represent specific signals within a train describer area. Depending on the coverage of the TD area, these may also include signals from fringe boxes to show a queue of trains approaching an area. If a fringe signal shares a number with a signal within the TD area, it may be given a different first character (for example, if the fringe signal is 0453 and this is already allocated to a signal within the TD area, the berth may be named Q453)
[A-Z][A-Z][A-Z][A-Z] Text berths represent sidings, fringe boxes or other special berths. These will be specific to the TD area, and are not found on signalling diagrams. They often represent trains waiting to enter a TD area, or trains sent to another area.
A***, B***, C*** A, B and C berths are often found on permissive platforms or bay platforms. They represent the first, second (and optionally, third) train descriptions waiting in the platform.
R*** R (Rear) berths usually represent a train arriving into a bay platform
F*** F (Front) berths usually represent a train departing from a bay platform. The front berth often shows the first outbound train of the associated A, B and C berths.
LS** or **LS LS berths (Last Sent) represent the last train descriptions sent to a fringe box or area. This is the most recent train to have been passed to that area's control.
STIN Strike In: a train entering a train describer's area
COUT Clear Out: a train leaving a train describer's area
TR**/SMT* Train Reporting (TR) or SMART (SMT) link status. SMT1/2 or TRT1/2 are usually links to SMART, and other values are links to train describers at fringe signalboxes
DATE Contains the current date in DDMM format (optional)
TIME/CLCK Contains the current time in HHMM format (optional)

Network Rail Open Data Feeds
Data Feeds About the Feeds Account States Durable Subscriptions Example Code ( PHP / C# / Java / Ruby / Node.js) • Advanced UsesFAQ Release Notes
Train Movements Train Movements Feed Train Activation Train Cancellation Train Movement Train Reinstatement Change of Origin Change of Identity Change of Location TSPEED Field Planned Cancellations Cancellation Codes
TD TD Feed C-Class Messages S-Class Messages Train Describers TD Berths
TSR TSR Feed Route Codes
SCHEDULE SCHEDULE Feed Schedule and Location Records Association Records CIF Codes How Scheduling Works Allowances
Reference Data Reference Data Feed TOC Codes CIF Codes Delay Attribution Codes Identifying Locations (STANOX, TIPLOC, NLC and 3-Alpha Codes) STANOX Geographical Areas Train Planning data