Project snapshot. More details below.
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Products
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Impact on Practice
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Product Status
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PRESERVATION APPROACHES FOR HIGH-TRAFFIC-VOLUME ROADWAYS AND GUIDELINES FOR PRESERVATION OF HIGH-TRAFFIC-VOLUME ROADWAYS (R26)
Guide clarifies key factors that affect preservation treatment decisions. It includes preliminary and final feasibility matrices for hot mix asphalt and portland cement concrete-surfaced pavements that engineers can use to quickly determine if a particular treatment type is recommended for particular distress types and severity levels. Example decision matrices simplify the complex factors involved and give steps for weighing technical inputs.
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These are the first systematic and comprehensive documents to provide the technical background and decision-making framework needed to bring proven preservation strategies widely into play for high-volume roads. By helping engineers to quickly and confidently select the right treatment at the right time for a given pavement, the guide can help transportation agencies embrace preservation instead of rehabilitation or reconstruction to realize significant savings.
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Staff Responsibility: James Bryant
For several years, pavement preservation has been an important strategy to extend the life of roadways. As transportation agencies grapple with decreased capital budgets, pavement preservation will continue to be an important strategy. Relatively small investments for preservation activities, if properly timed and applied, can significantly increase infrastructure life. Several transportation agencies apply preservation strategies on lower-volume roadways; however, the application of these strategies on high-volume roadways has lagged behind.
The application of preservation strategies to high-traffic-volume roadways presents a complicated set of challenges. Many of the products and approaches have been accepted for use on lower-traffic-volume roadways have not been accepted for use on high-traffic-volume roadways. Often the perception is that the use of a particular product or application has too great an impact on traffic, or the treatment has not been successfully applied under high-traffic conditions.
The objective of this project was to provide guidance for more effectively matching the pavement condition and other considerations with suitable treatments for high-traffic-volume roadways.
The final report documents the state of the practice for preservation treatment on asphalt and concrete pavements. Although the focus of the project was on treatments suitable for application on high-volume roadways, this report also discusses current practices for low-volume roadways. The information presented is derived from a detailed survey of transportation agencies and a review of national and international literature. In addition, the report provides a general framework for how best practices are identified. General guidelines were also developed on the application of preservation treatments on high-volume roadways. Presented as a separate document, the guidelines consider traffic volume, pavement condition, work-zone requirements, environmental conditions, and expected performance.
Status: The project is complete. SHRP 2 Report S2-R26-RR-1: Preservation Approaches for High-Traffic-Volume Roadways is available as an Adobe PDF and in hardcopy through the TRB bookstore. The guidelines, S2-R26-RR-2: Guidelines for the Preservation of High-Traffic-Volume Roadways, are also available online as a PDF and in hardcopy through the TRB bookstore.
