Bridge Structural Health Monitoring (SHM) is becoming a pressing concern due to the aging and degradation of the population of long- and short-span bridges and viaducts built in Italy over 40 years ago along more than 3,000 km of the national road network. The knowledge of the modal parameters and their eventual change in time can be used as indicators of the presence of potential structural damage, allowing also for the prediction of the remaining operational life of the bridge itself. This can increase the efficiency of the infrastructure management framework. In this context, traditional vibration-based SHM is implemented through the use of a costly network of fixed sensors on the structure, such as accelerometers, to acquire vibration data under operating conditions, falling into the Operational Modal Analysis framework.