Frequently Asked Questions
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Clear allWhat Is Entry-Level Driver Training (ELDT), and Who Needs It?
ELDT is federal minimum training from a Training Provider Registry provider. It is required for first-time Class A or B CDL applicants, upgrades, and first-time P, S or H endorsements.
Read moreWhen Does a Motor Carrier Need a USDOT Number, and How Is It Kept Current?
Interstate motor carriers file Form MCS-150 and FMCSA issues the USDOT Number. Intrastate hazmat Safety Permit carriers file MCS-150B and intermodal equipment providers file MCS-150C (49 CFR 390.19T).
Read moreWhat Triggers an FMCSA Compliance Review, and How Is a Safety Rating Assigned?
A compliance review may follow a carrier's request to change its safety rating, or an investigation of potential violations or complaints (49 CFR 385.3). It tests safety management controls.
Read moreWhat Hazmat Employee Training Must Trucking Companies Provide under PHMSA Rules?
Hazmat employers must train and test each hazmat employee, including owner-operators who haul hazardous materials, and no one may perform a regulated function until instructed (49 CFR 172.702).
Read moreDo FAA Drug and Alcohol Testing Rules Apply to Foreign Repair Stations?
Partly. Part 145 repair stations outside the U.S. whose staff do safety-sensitive maintenance on Part 121 aircraft are covered. It took effect January 17, 2025; compliance is due December 20, 2027.
Read moreHow Does FTA Random Drug and Alcohol Testing Work for Transit Employers?
Transit agencies must randomly test FTA safety-sensitive employees. The 2026 minimum rates are 50 percent for drugs and 10 percent for alcohol, unchanged per FTA's January 15, 2026 notice.
Read moreHow Do PHMSA Drug and Alcohol Testing Rules Apply to Pipeline Contractors?
Contractor employees who perform covered functions are covered employees. The operator can contract out testing but remains responsible for compliance (49 CFR 199.3, 199.115, 199.245).
Read moreWhat Is an Invalid Drug Test Result?
An invalid result means a lab could not establish a positive, negative, adulterated or substituted result. The HHS criteria and what the MRO does next.
Read moreWhat Does a pH Invalid Result Mean in a Urine Drug Test?
HHS treats urine pH from 4 to under 4.5, or 9 to under 11, as invalid. How pH 9.0 to 9.5 is reviewed and what HHS has proposed changing.
Read moreWhat Is Specimen Validity Testing?
Specimen validity testing checks whether a urine or oral fluid specimen is consistent with a normal human specimen. What DOT laboratories must test.
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