The cost of repairing faults in a large structure once the fault starts to approach criticality, is enormous. If damage is prevented at an early stage, maintenance works will be carried out in a planned way and before the bridge can become damaged beyond repair. Deployment of Structural Health Monitoring(SHM) system brings challenges and the continuous nature of SHM generates vast quantities of sensor measurements which must be processed in order to extract some measure of these structures’ current state of health. Long distance communication and local processing of data require higher power, the trade-off among the higher data processing, longer communication range, and lower power consumption for long time reliable operation, become one of the critical challenge for designing a wireless sensor system for SHM. This PhD will aim to assess bridge condition using low energy sensors and is part of a larger USA Ireland project with UAB (USA) and UCD (Ireland).