<p><p><strong>Reference(s):</strong></p><p><em>Al-Qadi and Hughes (2000)<br>Han et al. (2011)<br>Henry et al. (2005)<br>Pokharel (2010)<br>Thakur (2011)<br>Webster (1979)<br>Yang (2010)</em></p><p><strong>Method Summary</strong></p><p>Al-Qadi and Hughes (2000) visually inspected the roadway over three years after reconstruction revealed no sign of pavement distresses such as excessive rutting, cracking, or base failure. They confirmed that the geocell, in combination with a geosynthetic layer, provides a significant improvement to the pavement structure capacity when built over a weak subgrade.</p><p>Han et al. (2011), Pokharel (2010), Thakur (2011), Webster (1979), and Yang (2010) evaluated the rutting deformations of unreinforced and geocell-reinforced roads under different trafficking tests or laboratory plate loading tests and verified the benefits of geocell confinement. The test sections were exhumed after each test to examine deformed profiles of the subgrade and geocells.</p><p>Henry et al. (2005) monitored the road sections during spring thaw in 2002 and 2003 using visual inspection, measurements of rutting, photographic documentation, and written description. They evaluated the rutting deformation and pot holes formation in the unreinforced and geocell reinforced roads and verified the benefits of geocell confinement.</p><p><strong> </strong><strong>Accuracy and Precision</strong></p><p>The verification method has been successfully used to evaluate the roadway distresses. The accuracy and precision of this method for unreinforced and geocell-reinforced roadways have been confirmed.</p><p><strong>Adequacy of Coverage</strong></p><p>Roadway distresses can be evaluated by conducting reasonable tests. Visual observations and rut measures on pavement surfaces are quick and can have a large coverage. However, Rutting profiling takes significant time and effort; therefore, it cannot be done in a large area. There is a potential for newly developed equipment to expedite these measurements (i.e., see SHRPII programs, http://www.camsys.com/pubs/SHRP2_S2-S03-RW-1.pdf).</p><p><strong>Implementation Requirements </strong></p><p>Implementation requirements (cost, personnel, training, equipment, and time) can be minimal to excessive.</p><p><strong>General Comments</strong></p><p>The method is not applicable to a method approach specification but highly applicable to a performance-based specifications. The method can be used for several applications, such as pavement foundation stabilization, construction working platforms, thickness reduction of pavement section, and prolonging pavement service life.</p></p>