Carrier-level Safety Measurement System (SMS) results for every USDOT carrier with an inspection record — 694,566 rows. Per carrier: total inspections, driver/vehicle out-of-service inspection counts, and all five BASIC categories (Unsafe Driving, Hours-of-Service Compliance, Driver Fitness, Controlled Substances/Alcohol, Vehicle Maintenance) — each with its measure, inspections-with-violations, and FMCSA alert flag (over the intervention threshold). ~1,526 carriers are currently flagged in one or more BASIC. This is the 'is this carrier flagged unsafe' signal FMCSA uses to prioritize enforcement — normally viewable only one DOT# at a time through a clunky ASPX SPA. Joins fmcsa_carriers + fmcsa_crashes by dot_number. Powers the safety section on /carrier/{dot_number} canonical pages and the /api/v1/carriers/flagged list. Refreshed monthly on the SMS recompute cadence.
Every record in this dataset can be traced back to its primary source at https://ai.fmcsa.dot.gov/SMS/. Underlying content is a US federal government work (public domain under 17 USC §105); our derived data is licensed CC0 1.0.