The AASHTO Guide for Accommodating Utilities within Highways and Freeways, First Edition (2024), provides guidance on accommodating utility facilities within highway and freeway rights-of-way. The guide merges and updates two former AASHTO publications on utility accommodation, one covering freeway rights-of-way and one covering highway rights-of-way, both last issued in 2005. In doing so, it reflects the changes and developments in utility accommodation practice that have taken place since those documents were published. The guide was prepared for the AASHTO Committee on Right of Way, Utilities, and Outdoor Advertising Controls with research support from the Texas A&M Transportation Institute. Its coverage addresses both highway and freeway settings, where utility accommodation requirements differ. It serves agency staff, utility coordinators, and utility owners involved in approving and managing utilities along highway and freeway corridors.