The application of the concept of sustainability by transportation agencies is often limited by agencies' understanding of what sustainability means and how it can be integrated into the regular functions of the agencies. This paper presents a flexible approach and framework that can equip transportation agencies with the tools required to understand what sustainability means and incorporate sustainability into the organizational culture. This approach and method can also help agencies lay the groundwork for the use of performance measures so the agencies can progress toward sustainability goals and outcomes. The framework development process was an extension of findings from literature review, case studies, and interviews conducted as part of ongoing research under the NCHRP project Sustainability Performance Measures for State Departments of Transportation and Other Transportation Agencies. The proposed framework can be applied or adapted for use in a range of transportation agencies, including state departments of transportation and metropolitan planning organizations. A key feature of this framework is that it moves away from the traditional sustainable transportation perspective and instead promotes the consideration of transportation from a holistic sustainable development perspective. The framework defines broadly applicable transportation goals that can be broken down into a menu of objectives and performance measures to cover various transportation contexts. The framework is also designed to direct an agency's strategic planning toward the practical implementation of sustainability through performance measurement

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The goal of this paper was to develop a performance measurement-based approach for transportation agencies, such as state departments of transportation, to evaluate and enhance sustainability. This research proposes a performance measurement-based framework and evaluation methodology for sustainable transportation, linked to agency strategic planning goals. The methodology was applied and tested for the Texas Department of Transportation (TxDOT). This sustainability enhancement methodology is implemented within the highway-corridor planning process. The research identified 12 performance measures, including measures of congestion, safety, alternative modes, and air quality, to address the goals and objectives in TxDOT's strategic plan. The multiattribute utility theory (MAUT) decisionmaking approach was applied to quantify and normalize the selected performance measures and calculate sustainability index values for current and predicted future corridor conditions. This paper also presents the results from a pilot application of the methodology for a section of US-281 in San Antonio, Texas. The findings made it possible to identify specific performance measures and specific portions of the corridor that needed improvement to enhance the overall sustainability. This research provides a useful tool to assess the relative sustainability of transportation corridors now and in the future.

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