<p><p><strong>References:<br></strong><em>Christopher et al. (2010)<br>Elfino et al. (2000)<br>Koerner et al. (1996)</em></p><p><strong>Method Summary</strong></p><p>The verticality of the drain panel (e.eg. geocomposite) in the trench during the backfill operations can be maintained by utilizing a drain panel-positioning wheel or plate. Positioning of the drain panel against the shoulder side or pavement side of the trench must be addressed before installation based on the prevailing trench wall conditions. Proper spacing and installation of the drain outlets and outlet pipes should be made to enhance performance and reduce maintenance of geocomposite pavement edge drains. Clear and concise specifications for edge drains and their installation techniques are essential to the contractor, engineer, inspector, and the manufacturer to produce a well performing drainage system. Edge drains should be properly inspected by the engineers using mini cameras and/or borescope and feedback should be given to the contractors. Long-term performance of geosynthetic highway drainage systems can be demonstrated by exhuming several field sites and/or monitoring outflow rates from the drainage system.</p><p><strong>Accuracy and Precision</strong></p><p>Field evaluation of performance of geosynthetics for pavement drainage is accurate and precise.</p><p><strong>Adequacy of Coverage</strong></p><p>Field evaluation is often performed at selected sections or areas. The finding may not necessarily represent the overall performance. However, if critical sections can be identified and evaluated satisfactory, the performance of other sections can be guaranteed.</p><p><strong>Implementation Requirements </strong></p><p>Experienced personnel are required to for proper installation of the drain panel and special equipments are needed for proper inspection of the edge drains. Exhuming field sites to verify the long-term performance of drainage systems is time consuming and requires appropriate equipments. Hence, implementation requirements (cost, personnel, training, equipment, and time) for field evaluation are somewhat greater than desired.</p><p><strong> </strong><strong>General Comments</strong></p><p>This QC/QA method is applicable to both method approach and performance-related specification. The field control is proper installation and positioning of the geocomposte pavement edge drain systems to improve the long-term performance of the pavement. The field evaluation is verification of the performance of geosynthetics for pavement drainage.</p></p>