Train Movements

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Revision as of 11:01, 22 February 2013 by PeterHicks (talk | contribs) (→‎Message types: Note that DA messages aren't available)
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Overview

What is this feed?

The Train Movements feed contains data from Network Rail's TRUST system. This reports on the progress of trains along their journey.

Topics

Messages are available on TOC-specific topics, as well as an 'ALL TOCs' topic.

Individual TOC topics are named TRAIN_MVT_XX_TOC, where 'XX' represents the Network Rail 'business code' from the TOC Codes page. For example, CrossCountry has business code 'EH', and its topic is TRAIN_MVT_EH_TOC.

There are other topics which contain aggregated data from multiple TOCs:

Topic name Description
TRAIN_MVT_ALL_TOC All train operating companies
TRAIN_MVT_PASSENGER_TOC All passenger train operating companies
TRAIN_MVT_GENERAL Change of Identity messages for freight trains

Message types

The feed contains eight message types, all in JSON format:

Delay Attribution-related messages are not available.

NOTE - A Train Activation message will always be the first message to be received for a train, after which any of the other message types may be received.

Format

Each message is represented as a JSON hash with two keys - 'header' and 'body'. Zero or more of these messages is sent out in a JSON list, either every five seconds or when there are 32 messages to be sent. It is perfectly legitimate to receive an empty array.

All timestamp values are in milliseconds since the UNIX epoch.