FMCSA · Safety Measurement System register · Illinois

Controlled Substances/Alcohol in Illinois

• 252Violations recorded
• 50,233Registered carriers in the state
• 132,919State inspections addressing it

Driving under the influence of drugs or alcohol. Illinois carries 252 violations in this category, out of 14,736 recorded nationally, which places it 24 of 51 jurisdictions the register covers. Its share of the national figure is 0.017 as a fraction, banked by the build rather than turned into a ratio here. Nationally, a violation in this category carries an average severity weight of 8.55.

The state’s carriers by fleet size

• 1 power unit 24,267
• 2 to 5 power units 15,696
• 6 to 20 power units 5,285
• 21 to 100 power units 2,170
• 101 to 1,000 power units 459
• 1,000 or more power units 45

Other categories recorded in Illinois

• Crash Indicator 8,643
• Driver Fitness 5,149
• Hazardous Materials Compliance 675
• Hours-of-Service Compliance 10,558
• Unsafe Driving 10,122
• Vehicle Maintenance 36,714

Controlled Substances/Alcohol across every jurisdiction → Every category in Illinois →

Figures from the federal source files: EPA’s ECHO downloads, CMS provider files and the FMCSA census.

Counts from FMCSA SMS input files on data.transportation.gov: kjg3-diqy (Motor Carrier Census, 2,122,441 rows), rbkj-cgst (Inspection, 5,834,148), 8mt8-2mdr (Violation, 6,808,260), 4wxs-vbns (Crash, 255,582), p2mt-9ige (Out of Service Orders, 399,600); SoQL aggregates fetched 2026-09-16. The rank is taken over the jurisdictions this desk publishes, and the national figure beside it is the register’s own total for the category.