Overview

Theory review for Class B CDL holders upgrading to Class A, covering combination vehicle operation, coupling, and HOS.

When Is This Useful?

Helps drivers expand from heavy single vehicles into tractor-trailers and other combination vehicle work.

Who Is This For?

Current Class B CDL holders upgrading to Class A.

Topics Covered

Combination Vehicle Dynamics

Moving from Class B to Class A means operating vehicles with very different handling: longer wheelbase, trailer swing, and off-tracking on turns. This module explains the physics behind combination vehicle behavior as tested on the Combination Vehicles knowledge exam.

Coupling and Uncoupling

Proper coupling procedure is a primary topic on the Combination Vehicles written test and a required demonstration during the Class A skills test. You will learn the sequence that must be followed correctly to pass both the written and practical portions.

Air Line Management

Connecting and managing the service and emergency air lines between tractor and trailer is a skill Class B drivers do not typically practice. The exam tests both the correct connection procedure and what happens when those connections fail at speed.

Hours of Service Basics

Class A drivers commonly operate in interstate commerce, where federal Hours of Service rules govern maximum drive time, required rest periods, and logging requirements. This section covers the limits, exceptions, and logging concepts that appear on the CDL knowledge exam.

Class B to A Upgrade Theory

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Get Class B to A Upgrade plus more, for less than buying separately.

Combination Vehicles · Air Brakes · Class B to A Upgrade
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