How long are pavements constructed of asphalt binder typically designed to support traffic projections?

Pavements constructed with asphalt binder are typically designed to support traffic projections for a duration of 20 years. This design life is based on the expected wear and stress imposed by traffic loads, environmental conditions, and maintenance practices over time.

The 20-year timeframe allows for planning and engineering to ensure that the pavement will remain functional and safe for its intended use, accommodating friction, deformation, and other structural demands. This design consideration is crucial for maintaining roadway safety and longevity, as well as for minimizing future repair costs and disruptions.

In contrast, shorter design lifespans such as 10, 15, or 25 years may not align with the standard practices for asphalt pavements, as these either underrepresent or overrepresent the expectations for durability and maintenance in typical traffic environments.