The AASHTO Guide for Interlocking Pavements, First Edition (2024), synthesizes research and practice on interlocking and permeable concrete pavements for highway and municipal applications. The guide addresses the materials used in interlocking concrete pavement systems and the design of pavements constructed with them. Coverage extends to construction practices and to maintenance and preservation measures that keep these pavements serviceable over time. Sustainability and resilience considerations are treated alongside the design and construction guidance. The content reflects decades of accumulated experience with interlocking pavement installations. It is intended as a resource for state departments of transportation and municipal public works departments that design, specify, or maintain interlocking and permeable concrete pavements.