In the summer of 2002, under a new transparatation pooled fund study TPF-5(019), 12 full-scale lanes of pavements with various modified asphalts were constucted at the federal Highway Administration's (FHWA) Pavements Testing Facility (PTF) in virginia. The primary goal of the study is to use FHWA's two Accelerated Loading Facility (ALF) machines to validate and refine changes being proposed in…