About CDL Workbook
CDL Workbook is an independent, free study aid for the learner's permit knowledge test. It is not a DMV, is not affiliated with any licensing agency, and sells nothing.
The site carries 41 practice questions on the meaning of standard US road signs, 41 pages describing those signs, and 12 pages on general driving rules. All of it follows the federal Manual on Uniform Traffic Control Devices and general driver-education rules; none of it quotes a state handbook.
On 2026-09-13 the state-specific material was removed: the 1,200 state practice questions and the per-state speed limits, alcohol limits and licensing ages had been generated from a template after the intended handbook source could not be reached, and no source stood behind them. Each state page now links to the official agency instead.