California Commercial Learner's Permit & CDL Preparation California CDL Commercial Handbook
All applicants

General Knowledge

Vehicle control, inspections, communication, speed, space, hazards, emergencies, railroad crossings, fatigue, and safe driving.

Inspect before movement

A commercial driver's first defense is finding defects before traffic and speed increase the consequences.

Control speed and space

Stopping distance, following distance, curves, grades, weather and visibility require early adjustment.

Communicate and keep an escape path

Signals, mirrors, horn and lane position help other road users understand a large vehicle.

Module progressNot completed