TU Braunschweig



Assessment of safety requirements of GNSS / GALILEO based train locators on low traffic density lines

Projectworker: Jan Poliak, Frank Hänsel
Sponsor: international Union of Railways (UIC)

With the ongoing development of the European satellite based localisation system GALILEO, the demand of dependable position information in the field of railways is also rising.

The UIC Expert Group "GALILEO applications for rail" has elaborated the strategic actions aiming at securing the efficient implementation of GNSS/GALILEO based technologies in the railway system. The actions have been approved by the UIC Infrastructure Forum and the UIC Executive Board has mandated the Expert Group to carry out the priority actions in order to implement the strategy of the railways.

The UIC Expert Group "GALILEO applications for rail" has identified, among the priority actions to be realised and completed within the work programme 2006, the elaboration of operational, functional and system representative (architecture) requirements of the train operations on low traffic density lines with GNSS/GALILEO support.

Within this specification, the trains? location function with the GNSS/GALILEO support has an important role, is relevant to safety and may be applied within a variety of technical solutions, depending on the selected adaptations to an optimised intended application case. In the same time the low-cost characteristic of applications may be considered within an optimisation process which would efficiently balance the use of technology and staff to comply with the operational requirements and global safety target.

Within this context the objectives of the work are:

  1. To assess the safety requirements of the train location function (realised by means of the train locator in combination with the other elements on board and in the traffic control centre), within a representative application scenario which involves a representative system architecture
  2. To provide an economic evaluation model of representative applications scenarios based on scalability and flexibility of utilisation of technology in train operation on low traffic density lines. The model will consider the low-cost considerations of applications on low traffic density lines (as assessed in the objective 1) and will be exemplified by an intended application scenario and compared with other (classical and standard signalling) solutions
The final aim of the work is to provide solid elements of analysis and decision in order to enable the Expert Group to elaborate optimised harmonised requirements to be recommended to the railways and to the profile industry.