As composite components age, the ability to detect progressive failure events becomes a critical reliability issue. This study investigates the nondestructive characterization of fiber-reinforced-polymeric (FRP) materials that are being subjected to accelerated load tests as part of a program to determine the long-term behavior of these materials for potential use in highway structures. The application of these materials to large scale highway systems will be radically different from those in other industries. FRP materials are subjected to a variety of mechanical loads (such as creep, impact, and fatigue) in different environmental conditions. Nondestructive evaluation techniques are used to establish material base-lines and are used to monitor damage progression. The fundamental goal of this study is to develop models that can predict the long term behavior of FRP materials and structures.