<p><p><strong>References:<br></strong><em>Al-Qadi et al. (1996)<br>Brandon et al. (1996)<br>Tsai et al. (1996)</em></p><p><strong>Method Summary</strong></p><p>Strain gages are used for measuring vertical strains throughout the cross section. Various types of strain gages can be selected to use in the field.</p><p><strong>Accuracy and Precision</strong></p><p>The gages must be protected from moisture and physical damage while maintaining flexibility to accurately measure small strains.</p><p><strong>Adequacy of Coverage</strong></p><p>Instruments are installed in several locations in the field.</p><p><strong>Implementation Requirements </strong></p><p>Instrument failure occurs during pavement construction or within a few weeks after construction.</p><p><strong>General Comments</strong></p><p>The strain gauges are placed as close as possible to the bottom of the base and asphalt concrete layers, and the top and bottom of the geosynthetics. Instruments are placed directly beneath the truck wheelpath and between the wheelpath and the roadway edge.</p></p>