The 5GCroCo project conducted large-scale trials of 5G technologies for Connected and Automated Mobility (CAM) in two road corridors along the border areas in France-Germany and Luxembourg-Germany. In this context, this paper provides a succinct description of a subset of the key 5G technologies that have been trialed and highlights representative experimental results that have been obtained for three CAM use cases with a clear focus of achieving seamless service continuity along cross-border and showing the benefits of 5G in comparison to 4G. The trial results provide an experimental validation of the feasibility of the technical solutions proposed, developed, and used in the project. © 2022 IEEE. ; ACKNOWLEDGMENT This work has been funded from the European Union's Horizon2020research andinnovationprogrammeundergrant agreementNo.825050 – 5GCroCo. © 2022, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.