The newly approved European standard contributes to the spreading of ITS in public transport. CEN/TS 15531-5:2022 focusses on ‘Public transport - Service interface for real-time information relating to public transport operations - Part 5: Functional service interfaces situation exchange: Situation exchange’ and has been developed by CEN/TC 278 WG 3 - ‘Public Transport'. 

This new TS provides guidelines for the SIRI Situation Exchange service (SIRI-SX) for public transport. This service allows the efficient exchange of data about situations consisting of actual or potential perturbations to the normal operation of a transport network. SIRI-SX relies on an extensive database of situation models, allowing a structured description of all aspects of multimodal travel situations, including cause, scope, and effects. The structured values enable computer-based distribution through various channels and the presentation of data in different formats for different devices and audiences.