The AASHTO Guide for Pavement Friction, Second Edition (2022), provides recommendations for designing and managing highway pavements for surface friction. The guide explains the role of pavement friction in safety and describes how friction is measured through field testing. Friction is discussed from the management standpoint, covering the development of agency friction policy and program decisions. A design chapter guides users through the surface friction design process, including the development of friction demands for new and existing pavements. This second edition updates the material on friction testing and safety, including how risk factors enter friction management decisions. It is intended for highway materials, design, pavement management, safety, and research engineers concerned with pavement surface characteristics.