AASHTO TAMGFI-2, the Second Edition (2020) of the transportation asset management guide, sets out how a transportation agency can build and mature a strategic asset management program. Seven core chapters move from introduction and TAM strategy and planning through organization and people, asset performance, resource allocation, monitoring and adjustment, and information and systems. Each chapter closes with a maturity scale that lets an agency rate its current practice and identify the next level of development, supported by its own reference list. The guide draws on national and international experience. It was developed under an NCHRP project with contributions from numerous state departments of transportation. It is written for state DOT executives and managers, as well as county and municipal transportation agencies, seeking to preserve highway assets and get more from available funding.