Guidance for Implementation of Traffic Incident Management Performance Measurement

Welcome to the NCHRP 07-20, Guidance for Implementation of Traffic Incident Management Performance Measurement website.  This website, which was developed directly from the project’s guidance document, provides concise guidance on the consistent use and application of TIM performance measures in support of the overall efforts of TIM program assessment.

The guidance incudes two major sections: a section on Performance Measurement for TIM Programs and a Model Database section. The Performance Measurement for TIM Programs section provides an overview of TIM performance measurement, including:

  • Descriptions and consistent definitions of the three nationally-recognized TIM performance measures, as well as how to calculate the performance measures.
  • Descriptions/examples of how to use incident characteristics (e.g., incident severity, injury severity) to put TIM performance measures into context to provide meaningful comparisons of TIM performance within and between agencies.
  • The most common sources of TIM data, including traffic management centers, law enforcement, and freeway service patrols.
  • A discussion of the most prevalent issues facing many TIM programs, including inconsistent definitions; data availability, sharing, and exchange; data quality and completeness; and data timeliness.
  • Example TIM performance graphics and reports, as well as examples of the analysis of TIM performance data from different perspectives and the use of data visualization techniques.
  • A discussion of the legal and institutional issues that may affect both TIM performance measures and the tactical elements of TIM during response to an incident.
  • Examples of current agency practices with respect to TIM performance measurement.
  • Key points for success.

The Model Database section presents an in-depth discussion surrounding the development, implementation, and application of a model TIM performance measurement database, including:

  • A dictionary of data elements pertaining to TIM performance measurement.
  • A model TIM performance measurement database schema that logically groups individual data elements into related areas.
  • A script that can be used to generate an empty TIM performance measurement database from the model schema.
  • A script that will populate the look-up tables of the TIM performance measurement database.
  • Example analyses of performance objectives or strategic questions that might be of interest to an agency or TIM program, as well as a link to the corresponding data elements in the model database.
  • Detailed example applications of the model TIM performance measurement database.
  • Database scripts/queries associated with the example applications.
  • Database outputs, analyses, and visualizations associated with the example applications.
  • The model TIM performance measurements database in this guidance is intended to be used by an agency or group of agencies to download and apply to a database software package to quickly generate their own TIM performance measurement database.

The model TIM performance measurement database developed for this project is intended to be downloaded, applied to a database software package, and used by agencies as a starting point for a TIM performance measurement database or as supplemental or supporting information to an existing TIM database.

This website is organized so that an agency or TIM program can identify the most relevant sections to its program using the drop down menus under the major section tabs. If an organization is just getting started, the user should start with the section on Performance Measurement for TIM Programs to learn about various TIM performance measures and how to calculate them.  If an organization has already begun to collect and analyze TIM performance measures, but does not have a formal TIM performance measurement process or database, the user might want to start by reviewing the information in the Model Database section relevant to establishing a formal process or database, although information in the section on Performance Measurement for TIM Programs may also be insightful. If an organization already has a formal TIM performance measurement program, database, and reporting system, the user may be able to glean information about the analysis of performance measures on specific incident characteristics, as described in the Analysis page and/or the pages detailing the Example Organization Objectives.

Regardless of where an organization or TIM program currently is with respect to TIM performance measures, this guidance presents pertinent information that can be used by any organization to further advance their TIM program.