Welcome to TRB’s SHRP 2 Capacity Performance Measures web resource. This web resource is designed to help you select performance measures to support the evaluation of major highway capacity projects. The resource allows you to both browse individual planning factors (i.e., key issues you may want to address with performance measures) and to generate a report with a set of measures that are relevant to your project.
The web resource provides a framework for picking measures organized around five areas of concern – transportation, environment, economic, community, and cost – and 18 specific factors. Within each of the factors at the left, you will find descriptive information about that factor, a set of performance measures developed to support the SHRP 2 capacity framework, and case studies that illustrate the use of many of these measures. There are several ways to access this information:
- The factor area navigation at the left is the primary means to access descriptions of each factor, measures, and related case studies. Within each factor page, users can read about the factor, individual measures, and case studies, or select measures for inclusion in a report.
- The Measures Checklist link at the top of the page allows a user to directly select measures for inclusion in a report. Measures selected through the factor area navigation will be selected in this checklist.
- The Diagnostic Tool may be useful if you are not sure where to begin and you have a specific transportation project in mind. The tool provides a short set of questions that will select a potential, though not complete, set of measures for consideration and populate the measures checklist.
- Finally, the Project Development Stages provides information about using measures at various stages of the planning and project development process, from long-range planning through project design.
The measures in the framework are grouped by objective. These were chosen to reflect common objectives in use at transportation agencies, but most agencies will want to adapt these objectives to suit their own purposes. The web resource provides a description of each measure, data that may be required to calculate the measure, and the scale at which the measure is typically applied. The case studies offer examples of recent efforts by agencies to employ measures in the specific factor areas.