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State departments of transportation (DOTs) and other local and regional agencies must invest public resources—funds, land, staffing, and others—to develop and operate a transportation system that will provide mobility—efficiently, safely, and with the least possible environmentally adverse impact—to support the economy and enhance quality of life. These investments are made to construct, maintain, preserve, enhance, rehabilitate, or replace a diverse portfolio of physical assets such as pavement, traffic signals, guardrails, bridges, signs, and drainage structures. Deciding how best to allocate inevitably limited resources across these various types of assets to provide acceptable transportation system performance poses a persistent and difficult challenge for agency managers, elected officials, and the public. This report presents guidance for state transportation agencies on allocating limited resources among asset classes and organizational units to provide optimal system performance. The guidance includes discussion of analytical tools to support decision making and is supplemented by a prototypical spreadsheet-based implementation of the guide’s analysis framework.
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