This summary report highlights the history and most recent accomplishments or the Long-Term Pavement Performance Program (LTPP). Over the past 20 plus years of data collection, LTPP has produced a wide array of accomplishments and benefits and has created a variety of innovative products for highway agencies and researchers to utilize. Through partnership with key program stakeholders, the LTPP program has worked to fulfill each of its original objectives, with the ultimate goal of extending pavement life through better understanding of the factors that affect performance.