This project proposes the design and prototyping of a low-cost, 3D-printed triboelectric nanogenerator (TENG) to harvest vibrational energy from bridges and simultaneously serve as a structural health monitoring sensor. The system leverages contact-separation mode TENG principles using materials with differing electron affinities to generate electricity from bridge vibrations caused by vehicular movement or wind loads. The 3D-printed enclosure and modular internal design allow for scalable deployment on bridge girders or support beams. In addition to powering low-energy sensors or IoT modules, the voltage signals from the TENG will be analyzed to detect anomalous vibration patterns, enabling predictive maintenance.