Overview
IEC 63536:2025 - "Railway applications - Signalling and control systems for non UGTMS urban rail systems" defines the minimum functional requirements for signalling and control systems used on urban guided passenger transport lines and networks that:
- operate by line-of-sight (TOS/GOA0) or automatic interlock with intermittent supervision (NTO/GOA1a),
- are not covered by the UGTMS (IEC 62290) series, and
- do not form part of an urban traffic control system, although they may interface with one.
This standard provides a top-level framework so users can specify more detailed requirements. It is explicitly not applicable to continuous supervision/continuous data transmission systems already covered by IEC 62290.
Key topics and technical requirements
IEC 63536 focuses on functional safety and operational safeguards tailored to urban rail/tramway contexts. Key technical topics include:
- Functional requirement scope: Minimum functions for signalling and control (route setting, securing, display of movement authority).
- Operational modes: Coverage of on‑sight operations (TOS/GOA0) and non‑automated intermittent supervision (NTO/GOA1a).
- Control areas and boundary conditions: Independent point control, single‑track section control, level crossing control, and route control.
- Hazard analysis: Identification of hazards for each control area (independent points, single‑track sections, level crossings, routes).
- Interface requirements: Interaction with external devices and road traffic controllers (signalling of crossings, exchange of requests/demands).
- Minimum signalling functions: Request, set and secure operations for points, single‑track sections and level crossings; signalling aspects for rail traffic; display of movement authority.
The document emphasizes functional definitions and boundary conditions rather than prescriptive architectures or operational rules.
Applications and who uses it
IEC 63536 is intended for professionals involved in urban rail systems that require more capability than standard traffic signal controllers but do not require full rail OCS/continuous supervision. Typical users:
- System owners and operators of tramways, metro extensions, and light rail systems
- Signalling engineers and integrators designing point control, route control and level crossing interfaces
- Procurement teams specifying minimum functional requirements for signalling equipment
- Safety assessors and regulators evaluating conformity and hazard mitigation for non‑UGTMS urban rail
- Traffic planners coordinating interfaces between rail signalling and urban traffic controllers
Related standards
- IEC 62290 series (UGTMS) - covers continuous supervision and train protection profiles; IEC 63536 is complementary and applies where IEC 62290 is not applicable.
- Developed by IEC Technical Committee 9 (Electrical equipment and systems for railways).
Keywords: IEC 63536:2025, urban rail signalling, non UGTMS, TOS/GOA0, NTO/GOA1a, line‑of‑sight signalling, intermittent supervision, level crossing control, single‑track section control, independent point control.