This document specifies data elements and data frames for messages
exchanged between roadside modules and:
signal controllers;
traffic management centres, and/or;
other roadside modules.
exchanged between traffic management centres and signal controllers.
This document addresses the data in the application layer of the OSI (Open Systems Interconnection) reference model.
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.