PD CEN TS 15531-4-2021 PDF

Full title and description

STB PD CEN TS 15531-4:2021 — Public transport — Service interface for real-time information relating to public transport operations — Part 4: Functional service interfaces: Facility monitoring. This Technical Specification (SIRI‑FM) defines a machine-readable service interface and data model for exchanging real‑time information about the availability, condition and monitored counts of passenger facilities (e.g. lifts, escalators, toilets, ticket machines, waiting rooms) between monitoring systems, operator control centres and passenger information systems.

Abstract

CEN/TS 15531-4:2021 (SIRI Facility Monitoring) specifies the Facility Monitoring functional service as an extension to the SIRI real-time information framework. It defines the business context, core data model elements (Facility, FacilityCondition, FacilityStatus, Remedy, MonitoringInfo, Counting, UpdatedPosition), message patterns, common use cases (manual updates, automatic sensor-originated events, verification workflows) and interoperability guidance to support operational monitoring, dissemination to passenger information services and onward system integration.

General information

• Status: Technical Specification (CEN/TS) — current (provisionally adopted).
• Publication date: December 2021 (CEN approval: 22 November 2021; national adoptions and publications January–February 2022; noted valid from 31 December 2021).
• Publisher: Comité Européen de Normalisation (CEN) — national adoptions published by respective national bodies (PD / STB / UNE / BSI / NBN, etc.).
• ICS / categories: 35.240.60 — IT applications in transport (real‑time information exchange for public transport).
• Edition / version: CEN/TS 15531-4:2021 — supersedes CEN/TS 15531-4:2011.
• Number of pages: Approximately 60–62 pages (varies slightly by national publication and PD/TC tracked-change editions).

Scope

This Technical Specification defines the SIRI Facility Monitoring (SIRI‑FM) functional service for exchanging information about changes to the availability and condition of passenger facilities used in public transport operations. SIRI‑FM covers: the logical data model for facilities and conditions; messages for reporting, updating and querying facility condition and monitored counts; use cases for manual and automatic origination, verification and remediation workflows; and integration/interoperability guidance for producers, data hubs and consumers. The scope explicitly applies to traditional public transport and to new mobility modes (for example shared vehicles) where facility monitoring information is relevant.

Key topics and requirements

• Definition of the Facility Monitoring service within the SIRI family and its relationship to other SIRI profiles (Stop/Vehicle/Connection monitoring, Situation Exchange).
• Core data model elements: Facility, FacilityCondition, FacilityStatus, Remedy, MonitoringInfo, Counting, FacilityUpdatedPosition.
• Message types and exchange patterns: requests/deliveries, subscriptions, notifications and acknowledgements suitable for real‑time operational flows.
• Use cases: manual operator entry, automatic sensor/device events (e.g. lift failure), verification and editorial workflows, passenger guidance and remedial actions.
• Interoperability rules and conformance recommendations for producers, data hubs and consumers, including capability advertisement and subscription handling.
• Reference to XML schema and example payloads consistent with the SIRI framework (implementation guidance for vendors and integrators).
• Recommendations on auditability, timestamps, versioning, and basic operational roles (producer, data hub, consumer/broadcaster).

Typical use and users

Primary users are public transport operators, control/operations centres, ITS integrators, passenger information service providers, real‑time data hubs and system vendors that produce, aggregate or consume live information about facility availability and condition. Typical uses include informing passengers about out‑of‑order lifts/escalators, reporting toilet availability, sharing remedial action status, integrating sensor alarms into control systems, and feeding digital displays and mobile apps with up‑to‑date facility status and counting information.

Related standards

CEN/TS 15531-4 is part of the SIRI family and should be used alongside the other SIRI parts (EN 15531-1 Context & framework; EN 15531-2 Communications infrastructure; EN 15531-3 Functional service interfaces; CEN/TS 15531-5 Situation Exchange). It is commonly implemented together with Transmodel (EN 12896 series) and NeTEx profiles for scheduled data exchange, and with national SIRI profiles and implementation guides. Implementers should also consult the SIRI XML schema and the SIRI management/implementation guidance for example payloads and interoperability notes.

Keywords

SIRI, Facility Monitoring, SIRI‑FM, real‑time information, public transport, facility condition, accessibility, monitoring, Transmodel, NeTEx, ITS, subscription, XML schema.

FAQ

Q: What is this standard?

A: It is CEN/TS 15531-4:2021 — the SIRI Facility Monitoring Technical Specification, which defines a functional service for exchanging real‑time information about the availability and condition of passenger facilities in public transport.

Q: What does it cover?

A: It covers the business context, data model, message patterns and use cases for reporting and distributing facility condition and counts (e.g. lifts out of service, toilet availability, monitored passenger counts), plus interoperability guidance for producers, hubs and consumers within the SIRI framework.

Q: Who typically uses it?

A: Public transport operators, control/operations centres, ITS vendors and integrators, passenger information providers, data hub operators and authorities deploying real‑time passenger information and operational monitoring systems.

Q: Is it current or superseded?

A: The 2021 Technical Specification supersedes the 2011 edition. It was approved by CEN on 22 November 2021 and published in December 2021; national adoptions followed in early 2022. The CEN/TS was issued for provisional application with an initial limited validity period (members were invited to comment within the provisional period).

Q: Is it part of a series?

A: Yes — it is part of the SIRI (Service Interface for Real‑time Information) series (EN/TS 15531 parts). Use it together with EN 15531 parts 1–3 and other CEN/TS parts (for example Part 5 Situation Exchange) and with Transmodel / NeTEx standards for full scheduled + real‑time interoperability.

Q: What are the key keywords?

A: SIRI, Facility Monitoring, facility condition, accessibility, real‑time information, public transport, ITS, Transmodel, NeTEx, subscription, XML.