The regular annual meeting of the Technical Committee TO524 (Intelligent Transport Systems) of the Croatian Standards Institute was held on September 30, 2021. Prof. Sadko Mandžuka, as a regular member of the Committee, introduced the participants to the project “OJP4DANUBE – Coordination mechanisms for multimodal cross-border traveler information network based on OJP for Danube Region” and related standardization in the field of providing travel information services for cross-border travel planning. One of the key document is CEN / TS 17118: 2017, Intelligent transport systems – Public transport – Open API for distributed journey planning, and it will be published in the HZN newsletter 10/2021. The Faculty of Transport and Traffic Sciences of the University of Zagreb, as a partner in the project, will organize a special workshop on this topic and will invite members of TO524 to participate.