ISO TR 21724-1-2020 PDF

Full title and description

ISO/TR 21724-1:2020 — Intelligent transport systems — Common Transport Service Account Systems — Part 1: Framework and use cases. This technical report defines the Common Transport Service Account (CTSA) concept and role model intended to enable account-based, multi-service payment and access across transport modes (tolls, public transport, parking, micromobility, carshare, charging, etc.).

Abstract

This document describes the characteristics of a Common Transport Service Account System (CTSA), presents a CTSA framework and a set of use cases, and introduces terms to support convergence of payment for transportation services into common or linked mobility accounts. The framework is account-based (back-office focused), technology-agnostic at the front end, and addresses roles, responsibilities, actors, data flows, privacy and security considerations for integrating multiple transport services and operators.

General information

• Status: Published.
• Publication date: 21 July 2020.
• Publisher: ISO — International Organization for Standardization (prepared by ISO/TC 204, Intelligent transport systems).
• ICS / categories: 03.220.20 (Road transport); 35.240.60 (IT applications in transport).
• Edition / version: Edition 1 (2020).
• Number of pages: 32.

Scope

Defines the CTSA concept and framework for account-based integration of transport services and describes relevant actors, data flows, functional requirements and illustrative processes/use cases (e.g., user registration, secureID handling, multimodal journeys, point of sale, fee/fare calculation, validation and open-payment interactions). The document focuses on the back-office/account-management perspective and on enabling seamless acquisition of access rights and consolidated charging across multiple service providers.

Key topics and requirements

• Definition of CTSA and role-model for account-based multimodal transport payments and access.
• Functional requirements for CTSA back-office systems (account management, secureID management, privacy and security controls).
• Actors/entities and framework data flows between transport service managers, payment systems, banks and users.
• Comparison and integration considerations with existing Electronic Fee Collection (EFC) and other charging systems.
• Use cases and process descriptions: registration, secureID onboarding/sharing, multimodal journeys, point-of-sale and open-payment transactions, validation and hot-list handling.
• Technology-agnostic front-end assumption with emphasis on centralized validation and account reconciliation in the back-office.

Typical use and users

Primary users include public transport authorities, tolling agencies, mobility service operators, payment service providers, ITS system integrators, solution architects and consultants working on multimodal payment, account-based ticketing, and regional mobility platforms. The report is intended to guide planners and implementers who are designing back-office account systems, open-payment integrations and cross-operator billing/clearing arrangements.

Related standards

Closely related ITS and electronic fee-collection work from ISO/TC 204, including standards and technical specifications on Electronic Fee Collection (EFC) system architecture and personalization of on-board equipment, as well as ITS application and identification standards. Examples of related deliverables from the same technical committee include ISO/TS and ISO documents addressing EFC architectures, personalization of on-board equipment, and ITS application requirements.

Keywords

Common Transport Service Account, CTSA, account-based ticketing, back-office, secureID, electronic fee collection (EFC), open payment, multimodal, ITS, payment integration, tolling, public transport, micromobility.

FAQ

Q: What is this standard?

A: A technical report (ISO/TR 21724-1:2020) that defines a framework and use cases for Common Transport Service Account Systems (CTSA) to enable account-based, cross-service payment and access across transport modes.

Q: What does it cover?

A: It covers the CTSA role model, actors and responsibilities, functional requirements for account/back-office systems, data flows, privacy and security considerations, and detailed use cases such as registration, secureID management, multimodal journeys, fee/fare calculation and open-payment processes.

Q: Who typically uses it?

A: Transport authorities, toll operators, mobility service providers, payment operators, ITS integrators, and planners responsible for designing account-based payment and billing/clearing solutions across multiple transport services.

Q: Is it current or superseded?

A: ISO lists ISO/TR 21724-1:2020 as published (Edition 1, July 2020). There is no record on the ISO catalogue entry indicating it has been superseded as of the ISO catalogue information retrieved; users should check ISO or national standards bodies for any subsequent amendments or related newer documents.

Q: Is it part of a series?

A: Yes — it is "Part 1" (framework and use cases) within the CTSA topic as developed by ISO/TC 204; other ISO/TC 204 deliverables on electronic fee collection, personalization of on-board equipment and ITS application requirements are complementary and relevant. Further parts or related deliverables may be published under ISO/TC 204.

Q: What are the key keywords?

A: CTSA, account-based, back-office account management, secureID, multimodal payment, open payment, electronic fee collection, ITS, tolling, public transport.