This document constitutes a Part of the CEN 16157 DATEX II series of standards and technical specifications. This series specifies and defines component facets supporting the exchange and shared use of data and information in the field of traffic and travel. The component facets include the framework and context for exchanges, the modelling approach, the data content, the data structure and relationships and the communications specification. Part 8, this document, specifies additional data model structures that are applicable for traffic management applications in the urban environment. This Part addresses data concepts to support the exchange of traffic management plans, rerouting, extensions of the existing DATEX II core model to better support application to the urban environment. It establishes specifications for data exchange between any two instances of the following actors: — Traffic Information Centres (TICs), — Traffic Control Centres (TCCs), — Service Providers (SPs). Use of this document may be applicable for use by other actors.