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Traffic Records

Good data is essential to creating effective highway safety programs. Traffic crash and fatality data is collected and maintained at the local, state and national levels in a variety of databases.


The Model Minimum Uniform Crash Criteria (MMUCC) is a minimum, standardized data set for describing motor vehicle crashes and the vehicles and persons involved. By providing a "minimum" set of data elements, MMUCC helps states collect reliable crash data, effectively guide enforcement planning, and shape sound traffic safety policy. This data set, originally published in 1998, has been revised three times, most recently in the 4th Edition (2012), in response to emerging highway safety issues. GHSA has helped manage these updates with funding from the National Highway Traffic Safety Administration (NHTSA).

GHSA and NHTSA have embarked on a project to update MMUCC. With new vehicle technologies being developed rapidly, the transition to MMUCC’s 5th edition offers an important opportunity to move the standard forward, streamlining frontline data collection and providing flexibility for data collectors and managers alike as vehicles and the driving environment continue to evolve. Highway safety professionals are encouraged to provide input on these proposed changes via an online forum developed by GHSA and NHTSA.

MMUCC Resources

GHSA worked with NHTSA to help states determine how well each state's Police Accident Report (PAR) and crash database aligns with the Model Minimum Uniform Crash Criteria (MMUCC) 4th edition and to develop a new tool to help states map their state PARs and crash databases to the 77 MMUCC data elements and attributes collected at the scene of a crash and the 33 data elements and attributes that are linked with other databases or derived from MMUCC data elements.

The resulting document, Mapping to MMUCC, was piloted in two states, New Jersey and Utah, and feedback was incorporated into the final version of the document. The results from this mapping process, along with additional feedback received from states during the development process, will be used to revise the existing MMUCC elements and the mapping process methodology will be incorporated into the Fifth Edition of the MMUCC Guideline.

Traffic Records Training for State Highway Safety Office Leadership

"Traffic Records Training for State Highway Safety Office Leadership" is a course that provides new Governor’s Representatives for Highway Safety (GRs) and Highway Safety Coordinators with an understanding of the critical role traffic records data plays in a State Highway Safety Office's planning and evaluation efforts, their data-related responsibilities under MAP-21, and additional resources.

NHTSA logoCambridge Systematics developed the course and executive briefing in collaboration with an expert panel of GHSA members and traffic records managers. The project was funded by NHTSA.

Download Course Modules and Materials

Traffic Records Course cover

The course is comprised of two modules: Overview of Traffic Records and Getting Help with Traffic Records. They are available for download below as one PDF file or as separate standalone sessions. States are encouraged to use the executive briefing outline to prepare for conversations with new agency executives to explain why traffic records are worth their attention and support.