Definition
A converter dolly has an axle, fifth wheel, and drawbar used to connect semitrailers in a multiple-trailer combination.
Practical example
Example: A doubles driver inspects the dolly coupling, safety chains, air lines, and lights.
Why it matters
Dollies add articulation points and require careful coupling and inspection.
Dolly in CDL training
CDL students should be able to recognize this term, explain it in plain language, and connect it to safe vehicle operation, inspection, licensing, or freight work as applicable. Review the term in context and practice using it during classroom study and hands-on training.
Frequently asked questions
What does Dolly mean in trucking?
A converter dolly has an axle, fifth wheel, and drawbar used to connect semitrailers in a multiple-trailer combination.
Why should a commercial driver understand Dolly?
Dollies add articulation points and require careful coupling and inspection.
This glossary is educational. Always follow current federal and state rules, the vehicle manufacturer’s instructions, and your motor carrier’s procedures.