This document specifies requirements and recommendations for the planning, design, development and provision of communication services related to passenger transport so that this information can be accessed, understood and used by the widest range of users, including persons with disabilities and older persons. These requirements and recommendations enable an organization to extend its range of users by identifying diverse characteristics, capabilities, and preferences. The requirements set out in this standard are applicable to but not limited to passenger transport service providers including air-, bus, rail-, and waterborne passenger transport services.