Geotechnical instruments are essential for monitoring the structural health and stability of BRIDGES. These tools provide real-time data on various parameters to assess performance and detect potential issues. Common instruments include strain gauges for deformation, tilt meters for inclination, load cells for force distribution, inclinometers for lateral displacements, and vibrating wire strain gauges for high-precision strain measurements. Piezometers monitor water pressure, crack meters measure crack development, and settlement markers track ground movements. Acoustic emission sensors detect structural issues, and weather stations monitor environmental conditions. Regular analysis of this data ensures the safety and integrity of the bridge structure over time.