Weighted Mean Annual Pavement Temperature

Austroads has published an  interactive map  of the latest Weighted Mean Annual Pavement Temperature (WMAPT) data for Australia and New Zealand. This resource is designed to aid the design of asphalt pavements, reflecting the most recent changes in local temperatures due to climate change.

The performance of asphalt pavements, including aspects such as stiffness, rutting resistance, and fatigue life, is dependent on temperature. An accurate understanding of the temperatures that asphalt materials are subjected to in the field is essential for effective pavement design.

Austroads’  Guide to Pavement Technology Part 2: Pavement Structural Design  uses WMAPT data to estimate asphalt moduli at in-service temperatures, a factor in ensuring the durability and effectiveness of pavement structures.

The below map is a visual representation of the Weighted Mean Annual Pavement Temperatures in the Guide to Pavement Technology Part 2: Pavement Structural Design.

Looking ahead, Austroads is launching a new project aimed at estimating long-term projections of WMAPT.

Once completed, these projections will be incorporated into the interactive map, providing an even more robust tool for future-proofing pavement design against the impacts of climate change.