The paper presents the study carried out as part of the Gerico Project, which aims to provide bridges managers with insights on their bridges’ health thanks to a calibrated numerical model. Modal parameters identification as well as load tests are used to update a numerical finite element model. This model is then used to simulate structural health disorders. The Gerico (Gestion des Risques par ponts Connectés / Risk management with smart bridges) Project is part of a larger group of projects, financed by the French state and managed by the CEREMA (French public establishment) as part of the call for project “Ponts Connectés / Smart bridges”. Two steel bridges are under study: the Haut Village bridge and the Grand Pont de Mauves. This paper focuses on the Haut Village bridge. The Haut Village was instrumented for a period of several months, in order to evaluate the sensitivity of the measurements to seasonal evolution. An identification of modal parameters of the bridge (natural frequencies and mode shapes) was conducted using operational modal analysis. Accelerometers as well as optical cords were used to measure vibrations. Optical cords were also used during the load-tests-based calibration of the model. The mode shapes and natural frequencies retrieved from the operational modal analysis were compared to those extracted from a modal analysis conducted with the FEM software. The Modal Assurance Criterion was used to form pairs between experimentally and numerically identified natural modes of the structure. Another approach was explored for the calibration of the model, based on the exploitation of load tests performed on the bridge. In this approach, strains measured with the optical cords were compared to results obtained with the model. A semitrailer-type vehicle weighing 10 t was used for the tests. A total of 16 passages were performed, providing a large amount of data.