Definition
A device that restrains a trailer at a loading dock to reduce unintended movement or early departure.
Practical example
Example: The driver confirms the dock-restraint signal before loading begins.
Why it matters
Dock locks supplement, but do not replace, established parking and communication procedures.
Dock Lock 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 Dock Lock mean in trucking?
A device that restrains a trailer at a loading dock to reduce unintended movement or early departure.
Why should a commercial driver understand Dock Lock?
Dock locks supplement, but do not replace, established parking and communication procedures.
This glossary is educational. Always follow current federal and state rules, the vehicle manufacturer’s instructions, and your motor carrier’s procedures.