The KEYSTONE project aims to take a significant evolutionary step in the intermodal transport sector by creating an advanced digital ecosystem.

KEYSTONE stands for “Knowledgable comprEhensive and fullY integrated SmarT sOlutioNs for rEsilient, sustainable and optimized transport operations”. KEYSTONE is a HORIZON Research and Innovation Action (Call: HORIZON-CL5-2022-D6-02, Topic: HORIZON-CL5-2022-D6-02-03) and has received funding from the Horizon Europe research and innovation programme under grant agreement No 101103740. The project duration is 36 months, effective from 1st of June 2023 and the end date is 31st of May 2026. The Granting Authority is the European Climate, Infrastructure and Environment Executive Agency (DG CINEA1 ), under the powers delegated by the European Commission.

A significant focus of this project is the design of the software architecture. This includes a comprehensive low-level architecture that details the server configurations and the mapping of software deployment.

Deliverable 3.1 encompasses the app design, architecture, and development plan. This document is the output of Task 3.1, whose goal is to design an app architecture that ensures a secure and accessible application, based on the comprehensive research and guidelines provided by Work Package 2, and the gap analysis conducted in Task 1.3.

To ensure high usability across multiple devices for a limited-scale pilot, serve drivers, enforcement personnel, and logistics managers, ensure security, and enhance and foster collaboration with key logistics stakeholders, the app architecture presented in this deliverable includes a robust back-end platform where documents and data can be securely stored and exchanged. The KEYSTONE platform is designed to meet stringent security requirements, thus ensuring that all data is protected against unauthorised access and security breaches. The server infrastructure is meticulously planned to support, in a hypothetical future scenario, not only the application's requirements, but also a solid mechanism of load balancing, the possibility to add redundancy, and failover mechanisms to ensure uninterrupted service. The architecture is designed to ensure scalability and high performance, also after the end of the Project.

In addition to the architectural design, the document also establishes a clear roadmap for the development. This roadmap outlines the key milestones and deliverables, ensuring that the project stays on track and meets its deadlines.

In conclusion, the app architecture presented in D3.1 aims to provide a secure, accessible, and user-friendly solution that meets the needs of all stakeholders. By leveraging the research and guidelines from Work Package 2 and addressing the gaps identified in Task 1.3, we have created a comprehensive plan that will guide the development.