Federal Motor Carrier Safety Administration regulations govern commercial driving across the United States. From hours of service rules to drug testing requirements, understanding these federal regulations is essential for every CDL holder to avoid disqualification.
Hours of Service Regulations
The FMCSA's Hours of Service (HOS) regulations are among the most important rules for commercial drivers. Property-carrying drivers may drive a maximum of 11 hours after 10 consecutive hours off duty, may not drive beyond the 14th consecutive hour after coming on duty, and must take a 30-minute break after 8 hours of driving. They may not drive after 60 hours on duty in 7 consecutive days or 70 hours in 8 consecutive days. Violations of HOS regulations are serious traffic violations that can trigger CDL disqualification.
Drug and Alcohol Testing Requirements
The FMCSA requires commercial motor carriers to implement drug and alcohol testing programs for CDL holders. Testing is required in six circumstances: pre-employment, post-accident, random, reasonable suspicion, return-to-duty, and follow-up. CDL holders who test positive for controlled substances or alcohol at or above 0.04% BAC face immediate removal from safety-sensitive functions and must complete the return-to-duty process before resuming driving. The violation is recorded in the FMCSA Drug and Alcohol Clearinghouse, affecting future employment opportunities.