Bridge structures are very critical elements within a complex transportation system. Movable bridges (i.e., bascule bridges, lift bridges and swing bridges) are especially important elements because they allow to the traffic to cross active waterways granting passage to ships that would otherwise be blocked by the structure. Therefore, the reliability assessment as well as the health monitoring of bridge structures are challenging issues for all industrialized countries. If a finite element model is elaborated to these purposes, then experimental and analytical technologies can be successfully integrated to obtain a field-calibrated model. In this perspective, the paper addresses the optimal sensors placement for the dynamic monitoring of a historical swing bridge in Taranto (Italy). After a brief description of the bridge, both CAD and FE models are illustrated. Subsequently, the considered strategies for sensors positioning are presented. Finally, these techniques are employed in order to identify the best locations for the available sensors. Comparative analyses are performed to evaluate advantages and drawbacks of the obtained results in the aim to support the experimental design for this special structure.