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CHAPTER 1 Project Rationale and Approach Background The CAPTA effort is a continuation of efforts begun following the attacks of September 11, 2001. That event prompted a series of risk assessment and management projects initiated through the cooperative research programs managed by the Transportation Research Board of the National Academies. Several risk management guides were prepared independently and were aimed at either state transportation agencies that own or operate specific assets, or at specific asset classes within the transportation system. They included guides to assess risk and vulnerability for highway assets, ferries, tunnels, and bridges. These asset-specific guides pro- vide valuable, current information to owners and operators. This multimodal guide builds upon these prior mode-specific efforts. Much of the transportation-focused risk assessment and risk management guidance avail- able today is asset or threat specific. These approaches to risk management have the following characteristics: The analysis focuses on a specific asset or a select group of assets. The approaches assume or require substantial knowledge of likely threat/hazard scenarios. The approaches consider many possible scenarios that might disrupt transportation assets. These guides often require knowledge that the user may not possess or easily obtain and are typically specific to one transportation mode or asset class, such as bridges or tunnels. They are not designed to compare transportation assets across transportation modes, such as would be the case with vehicle fleets and tunnels. CAPTA, a strategic tool used to compare modes on an equitable basis for budgetary decisions, expands the tools available to transportation agencies to define their needs and determine an optimal distribution of funds. The CAPTA methodology provides a foundation for capital requests based on objective, transparent, defensible data and analysis. These well-thought-out requests made to a legislature or in response to a federal request for grant proposals will help transportation agencies acquire additional funding on the merits of the argument for assets that need resources. The CAPTA methodology helps manage internal resource allocation deci- sions among multiple modes by providing a means for analyzing needs through an equitable and transparent process that is applied consistently to all assets. The CAPTA methodology is designed primarily to be applied by practitioners at the state level. The spreadsheet through which CAPTA is implemented may be used separately, apart from this document. Part I of this report provides an overview of why this product was developed and the development process. The model is expected to be tested and improved through use. 7