Transportation agencies across the country are deploying pavement preservation strategies to extend pavement service life, keep road networks in good repair, and save money.
Elmore County, AL, for example, uses a 100-point scale to grade its 800 miles of paved roads every 2 years and applies preservation treatments such as fog seal, slurry seal, microsurfacing, and cape seals to improve the road network over time. In 2018, 80 percent of the county’s paved roads were graded at 80 or above, compared to 45 percent in 2004.
The Puerto Rico Highway and Transportation Authority (PRHTA) developed a pavement preservation plan, which included new pavement preservation specifications. The plan will help PRHTA determine when and where to apply preservation techniques versus major pavement rehabilitation based on the level of traffic, pavement condition, and environmental aspects.
The Tennessee Department of Transportation (TDOT) is loading pavement construction project segment data into its pavement management system, including historical project locations, costs, and types, such as mill and inlay, microsurfacing, and thin lift overlay. TDOT developed deterioration models for each major pavement construction and pavement distress. The agency built project selection decision trees to use with deterioration models to predict future pavement conditions at various funding levels.
Read the Missouri Department of Transportation’s “Concrete Repair Best Practices,” a report consolidating case studies from several States on six concrete pavement restoration techniques. Also see technical briefs for each technique: cross-stitching, dowel bar retrofit, diamond grinding, full depth repair, partial depth repair, and slab stabilization.
For information and technical assistance on pavement preservation, contact Jason Dietz of the Federal Highway Administration Resource Center, Thomas Van of the FHWA Office of Infrastructure, or Antonio Nieves of the FHWA Office of Asset Management, Pavements, and Construction.