This commercial driver study guide covers relevant Federal Motor Carrier Safety Administration (FMCSA) Entry-Level Driver Training (ELDT) concepts and Illinois commercial driver knowledge topics. Review the regulations, procedures, and safety checklists below as part of your CDL and commercial learner permit (CLP) preparation.
Dimensions
The general maximum width is 8 feet 6 inches and maximum height is 13 feet 6 inches; route class and vehicle configuration control length.
Axle weights
The handbook lists 20,000 pounds for a single axle, 34,000 for a tandem, and up to 80,000 for a five-axle combination depending on spacing.
Safety inspections
Many Illinois second-division and passenger vehicles require safety inspection every six or twelve months; specified heavier trucks, buses, school buses, tow trucks, and limousines are in the semiannual group.
Devices
Hand-held cellphone use and texting are prohibited; CMVs may not be equipped with an operating police-radar detector.
Exam focus
Apply the rule to the vehicle, credential, trip, or testing situation described. Do not substitute another state’s procedure for the Illinois rule.
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.