本文件描述了公共交通服务账户系统（CTSA）的特点。它介绍了公共运输服务账户框架和相关用例。CTSA角色模型的目标是涵盖相关的交通服务、支付方式、服务用户对服务收费的账户类型，这需要一个更全面的角色和责任模型。该模型还定义了影响和限制该模型的外部利益相关者，即一般金融（银行）系统。该框架假设一个基于账户的系统，在该系统中计算并收取服务费用。CTSA框架背后的主要思想是为运输服务用户提供一个好处，即多个服务/运营商经理通过一个公共运输账户无缝获取对多个运输服务的访问权。 该框架假设支付媒体和阅读设备的前端与技术无关。该框架的重点是后台/账户管理系统，作为整合多种交通服务和管理人员的工具。 本文件中引入了一组新术语，以区分交通服务支付的通用方法与使用“智能卡”或电子机票的更传统模式的趋同。该模型描述了向通用或链接移动账户的转变，以满足所有旅行者的支付需求，无论是停车、通行费、公共交通还是其他破坏性模式选项（如自行车、汽车共享、微交通、微移动），包括商业支付和福利模式。

This document describes the characteristics of a Common Transport Service Account System (CTSA). It presents the common transport service account framework and associated use cases. The objective of the CTSA role model is to cover relevant transport services, the payment methods, the account types where the user of the service is charged for the service and that requires a more overall role and responsibilities model. The model also defines external stakeholders that impact and border the model, that is, the general financial (banking) system. The framework assumes an account-based system where charges for services are calculated and charged in the account system. The main idea behind the CTSA framework is to provide a transport service user with the benefit of seamless acquisition of access rights to multiple transport services by multiple service / operator managers through a common transport account. This framework assumes a technology-agnostic front end with respect to the payment media and reading equipment. The focus of this framework is the back-office / account management system as a vehicle to integrate multiple transport services and managers. A new set of terms are introduced in this document to distinguish the convergence of a common approach for payment for transportation services from more traditional models using "smart cards" or electronic tickets. The model describes a move towards common or linked mobility accounts for all traveller payment needs, whether for parking, tolls, public transport and other disruptive mode options (e.g., bikeshare, carshare, microtransit, micromobility), inclusive of commercial payment and benefit models.