Community Research and Development Information Service - CORDIS

Infrastructure based road transport informatics systems

The functional requirements of infrastructure based road transport informatics (RTI) systems have been examined using a general systems architecture with 5 layers. This structure has been used to analyse the functional requirements of a number of RTI systems grouped into 7 application areas. The formal description technique developed is particularly suited to the analysis of integration scenarios. Although concentration has been on physical functions, the analysis has remained technology neutral.

The functional analysis has been supported by the TARSIM simulation model, which simulates processing and communication within the RTI application. Processing is represented by the reception and production of information packets. Processing and transmission rates are specified by the user, who can then study queues and bottlenecks in the system. Traffic is represented as a random process, which results in the generation of messages with exponentially distributed gaps at detectors and beacons. TARSIM therefore complements the analysis based on the formal description technique. TARSIM therefore supports evaluation, system comparison, prediction, sensitivity analysis, design optimisation, bottleneck identification and the establishment of hardware requirements and costs.

Reported by

Ian Catling Consultancy
Ash Meadow Bridge Way Chipstead
CR5 3PX Croydon
United Kingdom
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