Filstal Bridge

The bridges are located 85 meters above the ground and represent an engineering achievement, but also a complex structural entity with data from eleven thematic information categories. These originate from various data sources and calculation models and include condition data, loads, sensor measurements, and environmental impact.

We have developed a solution that unifies all these layers and provides a single comprehensive overview to understand and work with the information. There was a need for a system that could both handle the complexity and remain intuitive to use.

The solution is a digital twin system, built as a web-based application with fully synchronized 2D and 3D frontend. The application allows users to navigate through different data layers, each representing a part of the bridge’s condition and structure.

The system is based on open data standards, enabling information sharing with external stakeholders and third-party providers. The user interface is simple, with intuitive navigation that allows users to explore the structure in depth and retrieve specific information with just a few clicks.

For the first time, we implemented a semi-automated BIM-to-Unity import, enabling the transformation of complex building models into a user-friendly digital experience. This made visualization easier and created an architecture where all data flows between individual models and interfaces.

A key element of the solution is the special "points-of-interest" concept, which presents condition indicators, defects, and data feeds directly in the 3D model. This gives users realistic and clear access to data without losing technical depth.

To realize the vision, we assembled a broad team of specialists: structural engineers, sensor and measurement technicians, developers, UX designers, and front- and back-end architects. In addition, operations staff, maintenance managers, and representatives from authorities have all contributed with knowledge, testing, and feedback.

An early testing phase ensured that both the user interface and data models could be adapted in line with new requirements and insights. The iterative development process made it possible to work in a focused and efficient way, maintaining high quality from the first version.

The digital twin of the Filstal Bridges is both a visualization and an active tool for modern asset management. With access to real-time updated measurements and analyses, maintenance plans can be optimized, and necessary interventions predicted well in advance.

The system also ensures transparency and documentation, enabling cross-disciplinary collaboration. By transforming data into decision support, the future operation of the bridge has become smarter, safer, and more sustainable.