One of the most promising fields of finite element model updating involves using data obtained from the modal response of a structure to update a finite element model. The University of Central Florida (UCF) has constructed a scale model of a two span bridge. Using an impact hammer and accelerometers mounted on the structure, the first 17 natural frequencies and mode shapes were identified. Using two different residual error functions, a subset of the measured modal data was used to verify and update a finite element model of the structure so that it better reflects the behavior of the system. The results of the updating process are presented.