With millions of dollars being spent each year to maintain nearly 24,000 lane-miles of pavement in Montana, it is critical to know the effectiveness of maintenance techniques, given climate and traffic conditions. Although studies have been conducted to evaluate timely and cost-effective treatments, it is not known how these treatments enhance or extend pavement performance under Montana’s climate, traffic loads, and soil conditions. This project will result in the review and synthesis of past and present research data, identifying the adequacy of existing data and methodologies in terms of: 1) establishing appropriate preventive maintenance treatments, 2) evaluating the effectiveness of these treatments, and 3) examining the reported life-cycle cost of various alternatives.