# Structural HMA Overlays for PCC Pavement

HMA structural overlays are used to increase rigid pavement structural capacity. Therefore, they are considered rehabilitation, although they typically have some maintenance-type benefits as well.

- Canonical URL: https://pavementinteractive.org/reference-desk/design/structural-design/structural-hma-overlays-for-pcc-pavement/
- Last updated: 2026-11-01
- Review: reviewed by licensed professional engineers on the previous Pavement Interactive site, where reviewers were not recorded by name

HMA structural overlays are used to increase [rigid pavement](https://pavementinteractive.org/glossary/rigid-pavement/) structural capacity. Therefore, they are considered rehabilitation, although they typically have some maintenance-type benefits as well. Although the specific constants used may be different, flexible overlays of rigid pavement are designed in the same basic manner as flexible overlays of [flexible pavement](https://pavementinteractive.org/glossary/flexible-pavement/).