This document defines the enumerations used to encode events at a 100 millisecond resolution that occur on a traffic signal controller with high resolution data loggers. The enumerations definitions were developed as part of a multi-state pooled fund study, TPF-5(377), conducted in 2018-2019 that conducted a series of stakeholder engagements and panel meetings.


This work enhancing the signal performance measures was organized through the United States Department of Transportation’s Pooled Fund Program TPF-5(377) sponsored by the following state Departments of Transportation: California, Connecticut, Georgia, Indiana, Minnesota, North Carolina, Ohio, Pennsylvania, Texas, Utah, Wisconsin, the Federal Highway Administration and the City of College Station. This document is intended to replace the enumeration document developed in 2012.

Sturdevant, J. R., T. Overman, E. Raamot, R. Deer, D. Miller, D. M. Bullock, C. M. Day, T. M. Brennan, H. Li, A. Hainen, and S. M. Remias. Indiana Traffic Signal Hi Resolution Data Logger Enumerations. , Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 2012.

A summary of past high-resolution traffic signal performance measures can be found at:

Day, C. M., D. M. Bullock, H. Li, S. M. Remias, A. M. Hainen, R. S. Freije, A. L. Stevens, J. R. Sturdevant, and T. M. Brennan. Performance Measures for Traffic Signal Systems: An Outcome-Oriented Approach. Purdue University, West Lafayette, Indiana, 2014.

Day, C. M., D. M. Bullock, H. Li, S. Lavrenz, W. B. Smith, and J. R. Sturdevant. Integrating Traffic Signal Performance Measures into Agency Business Processes. Purdue University, West Lafayette, Indiana, 2015.


hi resolution data logger, enumerations, traffic signal controllers

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