Performance Measurement Framework for Highway Capacity Decision Making (2009) / Chapter Skim
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Executive Summary
Executive Summary
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The work completed for the performance measurement framework was based on several key supporting research efforts, each of which is detailed in the final report, including: • Development of the overall performance measurement framework, based on the broad application of performance management at transportation agencies in the United States; • A review of the literature on performance measurement, with a focus on ‘nontraditional' areas such as the environment, community, and travel time reliability; • Interviews with transportation agencies to determine the extent to which they are using performance measures in various areas identified in the literature; and • Targeted case studies to identify performance measures and applications at specific transportation and other agencies. Collaborative Decision Making Context The CDMF defines specific key decision points in project development.
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These performance factors capture the key areas that may be impacted by a potential project. Table ES.1 identifies the planning factors identified by topic.
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Although transportation projects often focus exclusively on safety, the focus in this framework is on the safety impacts of highway capacity expansion projects. Table ES.2 summarizes the measures identified in each of the transportation areas.
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Considering the effects of highway capacity on water resources can help protect water resources and also ecosystems, biodiversity, wildlife habitat, and endangered or sensitive species that rely on healthy aquatic ecosystems. Water quality protection has historically been considered after project sites have been selected, but there is growing support for considering water quality protection much earlier in the planning process, before environmental and permitting processes are required.
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Losses of Riparian and Floodplain Areas – Impact of transportation construction on the quality, quantity, location, and functioning of the areas adjacent to the affected water bodies that strongly influence water quality. Water Resource Plan Consistency – Consistency between water resources and watershed management plans and transportation project plans.
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This factor includes productivity effects driven by supply chain improvements, accessibility benefits, and more general macroeconomic impacts such as regional economic output and employment. The SHRP 2 Capacity focus area is conducting research into economic factors and potential performance measures as part of the C03 project, Interactions between Transportation Capacity, Economic Systems, and Land Use merged with Integrating Economic Considerations in Project Development.
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Therefore, these measures tend to be similar to those found in other factor areas, but are analyzed specifically with respect to these disadvantaged groups to ensure they are not carrying a disproportionate load of the negative impacts of capacity projects. Table ES.4 summarizes the measures identified in each of the community factors.
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Local/Regional Match – Percent of project costs absorbed by local or regional agencies. Private Investment – Private investment in complementary infrastructure.High-Value Opportunities for Data Improvement In addition to identifying potential measures, the SHRP 2 C02 identified potential data gaps and data gathering opportunities within the environment and community factors.
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Links to Decision Making The fundamental purpose of SHRP 2 Capacity research is to improve decision making regarding major capacity projects. This can help improve the environmental and community outcomes of major transportation projects and also speed up the process of project development and potentially reduce costs.
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• Goals should be consistent with those developed in 202; and • Goals for the corridor study define the universe of performance factors considered. • Measures are selected from within the factors identified in 403; and • Reasonable range of expectations set for each measure (i.e., what is the best that can be done for congestion or what is the worst allowable impact)
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These linkages provide the mechanism for performance measurement to support a collaborative process for selecting and developing major transportation capacity projects.
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