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Following discussions with Transport for Wales (TfW), we are running a project to develop a protocol / interface to allow easier integration between content management systems and passenger information displays. 

This project arrises because TfW would like to specify a standard interface between the Content Management System and RTI Displays, that suppliers would need to comply/work with to enable TfW to procure a single CMS that can interface to multiple displays from a number of suppliers. A number of other public bodies have similar requirements are interested in specifying a standard in forthcoming procurements.

The standard should specify the minimum capability that is to be expected of all displays supported through the interface (i.e. be able to represent real time vehicle arrival/departure information, text based messages and hold the scheduled timetable for at least that day's services).

We would like the interface to cater for the following:

  • Basic text based displays
  • Graphical displays - in addition to the minimum capability, also be able to provide additional information such as weather, news feeds, advertising, information videos etc.
  • Off grid displays - these will not have ready access to power and may not have significant data bandwidth available to show graphical content.

The interface should also cater for fault management data to be passed back to the CMS to enable monitoring and fault rectification.

The detail of the protocol is currently being developed and the latest draft documents can be viewed here, there are currently three parts available:

Part 1 - Architecture (Published) v1.1

Part 2 – Core Content Messages (Published) v1.1 

Part 3 - Message Types for Graphical Displays (Draft) v0.5

The latest draft of part 3 is available to download further down the page.

If you would like to get involved in the group please contact 


A working group has been setup to develop the protocol and has held a number of workshops so far, the recordings and mural boards (interactive white boards) for these can be found here:

11 August



16 & 23 September



22 October



13 December