Evaluations are critical to ensuring progress toward the vision of integrated intelligent transportation systems and achieving ITS deployment goals. Evaluations are also critical to an understanding of the value, effectiveness, and impacts of the National ITS Program activities, and allow for the program's continual refinement. The National ITS Program has undertaken assessment activities to satisfy these needs, and to use the spirit behind the Government Performance and Results Act (GPRA) to help ensure that the program is effective in meeting DOT's transportation goals.