Data Quality

U.S. Dept. of Transportation, Motor Carrier Safety Advisory Council, Federal Motor Carrier Safety Administration

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State Safety Data Quality (SSDQ)

States are rated on a monthly basis on the completeness, timeliness, accuracy, and consistency of State-reported crash and roadside inspection data in MCMIS.

*Announcement* February 23, 2012: The SSDQ methodology has been changed. It now includes a modified calculation for determining the non-fatal crash completeness measure's rating. Review the SSDQ methodology and the evaluation results for your State.

	Methodology Compares the data quality of State-reported crash and roadside inspection data to standards set by FMCSA.
	Mapping Tool Allows users to query, display, print and download maps and data tables. For every query, results are provided in both map and table format.
	Evaluation Reports Evaluates the completeness, timeliness, accuracy and consistency of the State-reported crash and roadside inspection data in the MCMIS.
	Historical Report Provides a historical review of a State's safety data quality performance over the past five quarters.

The FMCSA uses safety event data provided by the States to evaluate their safety programs. Since there is variability among States in the reporting of crash and roadside inspection data, a State Safety Data Quality (SSDQ) evaluation has been developed to evaluate the completeness, timeliness, accuracy and consistency of this State-reported data in the Motor Carrier Management Information System (MCMIS). The evaluation consists of nine performance measures and one overriding performance indicator. Each State will have a rating of "Good", "Fair" or "Poor" for each measure and rating. This evaluation will be updated monthly to reflect improvements in crash and roadside inspection reporting.

The criteria for reporting crashes to FMCSA is included in the following letter from the FMCSA Administrator:

Administrator's Letter (June 2004)
	Enclosure 1: Which Truck and Bus Crashes Does FMCSA Want
	Enclosure 2: Frequently Asked Questions
	Enclosure 3: Procedures for Entering Crashes without Carrier Identification into SAFETYNET

Federal Motor Carrier Safety Administration
1200 New Jersey Avenue SE, Washington, DC 20590 • 1-800-832-5660 • TTY: 1-800-877-8339 • Field Office Contacts