Trucking Compliance, Made Simple
Plain-English articles on DOT drug testing, the FMCSA Clearinghouse, and program management for owner-operators and small fleets.
49 CFR Part 40 Explained in Plain English
49 CFR Part 40 is the federal rulebook behind every DOT drug and alcohol test. Here's what it covers, who it applies to, and the parts owner-operators must actually follow.
DOT Alcohol Testing Explained: Breath Tests, Limits, and Consequences
How DOT alcohol testing works, the 0.02 and 0.04 BAC thresholds, when a breath alcohol test is required, and what happens if you fail or refuse.
DOT Post-Accident Drug and Alcohol Testing: When It's Required
When a DOT post-accident drug and alcohol test is required, the 8-hour and 32-hour deadlines, what happens if you miss the window, and consequences of a positive result.
Reasonable Suspicion Drug Testing: A Supervisor's Guide for Small Fleets
How reasonable suspicion drug and alcohol testing works under DOT rules, the required supervisor training, what qualifies as reasonable suspicion, and how to document it correctly.
FMCSA Clearinghouse: A Driver's Guide
The complete driver's guide to the FMCSA Clearinghouse — what it is, how to register, queries, consent, violations, and how to keep your record clean.
What Is a DOT Drug Test? A Plain-English Guide
What a DOT drug test actually is, who needs one, what's on the panel, how the collection works, and what the results mean — explained without the regulatory jargon.
New DOT Drug Testing Requirements (2026 Update)
Clearinghouse-II downgrade enforcement, the DOT oral-fluid testing rule, fentanyl discussions, and what owner-operators and small fleets must do in 2026.
How to Get Your CDL Back After a Failed Drug Test
A step-by-step return-to-duty roadmap: SAP evaluation, education or treatment, observed RTD test, follow-up testing, and Clearinghouse cleanup so you can legally drive again.
Do CDL Schools Drug Test? What to Expect Before Day One
Most CDL schools require a DOT drug test before you start behind-the-wheel training. Here's how it works, what gets reported, and what to do if you're worried.
What Drugs Are on a DOT Drug Test?
The DOT 5-panel test screens for marijuana, cocaine, opiates, amphetamines/meth, and PCP. Here's exactly what's tested and what isn't.
DOT Physical vs DOT Drug Test: What's Included?
Does a DOT physical include a drug test? Here's how the DOT physical and the DOT drug test differ, and when each one is required.
How Far Back Does a DOT Drug Test Go?
Detection windows for marijuana, cocaine, opiates, amphetamines, and PCP on a DOT 5-panel urine drug test — what truckers need to know.
What Happens If You Fail a DOT Drug Test?
Failing a DOT drug test triggers a Clearinghouse violation and the SAP-led return-to-duty process. Here's exactly what happens, step by step.
Do Owner-Operators Need a DOT Drug Testing Program?
If you hold a CDL and operate under your own DOT authority, you likely need to be enrolled in a DOT drug and alcohol testing program. Here's how it works.
What Is a DOT Drug Testing Consortium?
A plain-English explanation of how a DOT drug testing consortium works, who runs it, and why owner-operators need one.
DOT Random Drug Testing Explained for Truckers
How random selections work, who's in the pool, how often you'll be selected, and what to do when you are.
Pre-Employment Drug Testing for CDL Drivers
What CDL drivers and trucking companies need to know about DOT pre-employment drug testing and Clearinghouse queries.
FMCSA Clearinghouse Queries Explained
Pre-employment vs annual queries, full vs limited queries, and what owner-operators must do with the FMCSA Clearinghouse.
Ready to get your DOT drug testing program set up?
Enroll today or talk to us about your fleet. We help owner-operators and small trucking companies get set up quickly.