Urban-ITS Traffic Management Systems - Status, Fault and Quality



Traffic management in urban environment differs significantly from traffic management on highways. The major reason for this is the multiplicity of traffic participants and transport carriers, including pedestrians, bicycles, motorised private and commercial vehicles, public transportation by means of buses, trams, trains (metro), that either share transport paths, or of which the transport paths partly overlap. In addition to this complexity, self-driving vehicles, once introduced, will add further challenges for traffic management, including the need for electronic management of regulations and policies.

Regardless of how traffic management is being implemented, it is essential that reliable information on the status of the traffic and its traffic management tools, including various levels of potential faults, is available within due time by means of appropriate detection and reporting facilities in order to perform necessary counter-measures. The quality of traffic management is primarily determined by the design of traffic management systems, making use of trustable information on the actual status and potential faults of the traffic management system.

Monitoring and reporting of statuses and faults of a traffic management system requires appropriate communication means between the various entities of the traffic system, e.g. control centres and field devices. Considering the various traffic participants in an urban environment, a harmonized approach towards status, fault and quality in traffic management is necessary, and will become a pre-requisite once self-driving vehicles are introduced in a large scale. In future, high quality urban traffic management systems will not just be composed of control centres and field devices, but also of components installed in or carried by traffic participants. This leads directly to the need of standardized data and messages, and the concept of ITS stations introduced in ISO 21217. Such ITS station units, performing the exchange of data (including status and fault information) between each other, may become part of or even constitute the components of traffic management systems.

It is to be noted that ITS technologies developed in ISO TC204 and CEN TC278 under the acronym of C-ITS (Cooperative ITS) are applicable in the urban environment; i.e. U-ITS is not a new silo beside a C-ITS silo.



The objective of the project is expressed by the High Level Recommendation "HLRd: Traffic Management System status, fault and quality standards" presented in the Final report of PT1701. It is twofold:

  • to identify quality and performance criteria, i.e. service level agreements in terms of ITS performance e.g. availability, timeliness of data transactions or key performance indicators in terms of safety, efficiency and environmental impact, for the validation and assessment of traffic management services from suppliers, and
  • specify system status and fault information (particularly for the sub-systems in the field level), in order to support system monitoring and (semi-automated) fault clearance.

Further on, this project aims on contributing to the METR project of CEN TC278/WG17. METR is about "Management of electronic traffic rules".



The objectives result in a CEN Technical Specification

Intelligent transport systems — Traffic management systems — Status, fault and quality requirements

With the scope: Specify quality and performance criteria, and approaches to their evaluation, for the operation of traffic management systems, including factors affecting the effective integration of field and centre systems and services. To support this, specify a data model for system status and faults of components of traffic management systems. Present as informative annex a series of example use cases for the use of the quality and performance criteria, including design, procurement, and performance management.

Note that this scope excludes criteria and modelling of the status of the traffic itself, except insofar as this is related to the traffic management system performance.



This project of CEN TC 278/WG 17 mainly is performed by the project team PT1704 on "Urban ITS - Traffic management systems, status, fault and quality". PT1704 is funded by the European Commission under Grant Agreement SA/CEN/GROW/EFTA/546/2016-08 as response to the EC Standardization Request M546 on U-ITS.

PT1704 is guided by CEN TC 278/WG 17. The leader of PT1704 reports directly to the chairman of WG17.

PT1704 is composed of four members:

  • Dr. Hans-Joachim Fischer, Germany, acting as project leader and editor
  • Dr. Mark Cartwright, United Kingdom, acting as a technical expert on UTMC traffic management systems
  • Mr. Jörg Freudenstein, Germany, acting as a technical expert on OCA/OCIT traffic management systems
  • Mr. Dave Parkins, United Kingdom, acting as an expert on urban administration procedures.

The PT1704 team as a whole can be contacted via email using the address This email address is being protected from spambots. You need JavaScript enabled to view it..

PT1704 members maintain an informative web site.


Method of work

PT1704 members agreed on a precisely specified share of work. Most of the work is done as homework, and by web meetings.

The work of PT1704 initially was announced in a letter to stakeholders via TC278/WG17, inviting them for contributions. An informal liaison with a representative from the DATEX II group is established. Additionally, links from PT members to a wide range of stakeholders, including POLIS, TISA, UTMC, DIASER, ODG, RSMP, will be used to gather information and get feedback on preliminary results. Further on informative liaisons are maintained with CEN TC278 and ISO TC204 via the PT leader.

Standard development in PT1704 recognizes the rules:

  • Aiming on harmonized global applicability.
  • Recognizing national / regional existing solutions and smooth migration possibilities.
  • Not "re-inventing the wheel" but using what is available and useful.
  • Not interfering with responsibilities of others.



Related projects

Several projects are currently in development in response to the EC Standardization Request M546

Work under development:

Call for tender started (until 5 November 2017, see www.cen.eu)

  • Intelligent Transport Systems - Urban-ITS - Mixed vendor environments Methodologies & Translators
  • Intelligent Transport Systems - Urban-ITS - Mixed Vendor Environment Standards
  • Intelligent Transport Systems - Urban-ITS- Mixed Vendor Environment Guide
  • Intelligent Transport Systems - Traffic Management Systems -TM Data Models
  • Intelligent Transport Systems - Traffic Management Systems - TM interfaces and information
  • Intelligent Transport Systems – Urban ITS - Models and Definitions For New Modes