DataQs
FMCSA's online data quality challenge system that carriers and drivers use to dispute inaccurate crash reports or roadside inspection violations in the MCMIS database.
A successful DataQs challenge corrects the underlying MCMIS record, which then reduces the CSA BASIC score at the next monthly SMS update. Challenges are reviewed by the state agency that submitted the original record. Only factual errors can be challenged — disputes over correct records or fault determinations are not valid DataQs grounds. Access the system at dataqs.fmcsa.dot.gov.
Last updated: May 29, 2026