This commercial driver study guide covers relevant Federal Motor Carrier Safety Administration (FMCSA) Entry-Level Driver Training (ELDT) concepts and New Jersey commercial driver knowledge topics. Review the regulations, procedures, and safety checklists below as part of your CDL and commercial learner permit (CLP) preparation.
Endorsement authority
New Jersey uses T for doubles or triples, P for passengers, S for school buses, N for tanks, H for hazardous materials, and X for combined tank and hazardous-material authority. T requires Class A; S also requires P. An endorsement adds specialized authority but never substitutes for the correct base class.
Learner restrictions
A CLP may carry only P, S, and N endorsements. P or S learners may not carry ordinary passengers, and an N learner receives the no-cargo-in-tank restriction. The learner must be accompanied by a properly qualified CDL holder and must obey every class, brake, transmission, medical, and intrastate restriction shown on the permit.
Test-vehicle restrictions
Testing in an automatic CMV creates E, no manual transmission. Failure to demonstrate full-air-brake qualification can create L or Z. A Class A test without a qualifying tractor-trailer connection creates O. Testing in a smaller passenger group can create M, N, or New Jersey's Q restriction depending on the vehicle demonstrated.
New Jersey credential codes
K limits commercial operation to New Jersey intrastate commerce, V records a medical variance, and Q limits the driver to passenger vehicles designed for 15 passengers or fewer. New Jersey also lists T for a probationary driver who must obey supervision, night, and passenger limits when applicable.
Adding or removing authority
An endorsement, class upgrade, or restriction removal may require a new test receipt, knowledge test, ELDT record, representative vehicle, and skills test. A driver may voluntarily downgrade or remove an endorsement, but restoring it later requires the then-current qualification process.
Exam focus
Apply the rule to the exact New Jersey vehicle, credential, endorsement, age, commerce category, date, test stage, and operating facts. Current NJMVC instructions, controlling law, federal requirements, and the current official manual govern when an older form or brochure conflicts.
Commercial Driver License Exam Readiness: Achieving a passing grade of 80% or higher on state DMV commercial driver knowledge exams requires mastery of federal vehicle inspection procedures, gross vehicle weight ratings (GVWR / GCWR), braking mechanics, and road safety regulations.