Trucking Glossary

Learn what a steer axle is on a semi truck, how it works, why it’s important, and what CDL drivers should inspect before every trip.

Learn what a differential is on a semi truck, how it works, why it’s important, and how it helps commercial trucks turn safely and efficiently.

Learn what a Conestoga trailer is, how its rolling tarp system works, what it hauls, and how it compares to flatbeds, step decks, and dry vans.

Learn what bobtail means in trucking, why truck drivers bobtail, why it’s more dangerous, and how it differs from deadheading.

Learn what glad hands are, how they work, why they matter, how to connect them properly, and common mistakes every CDL driver should avoid.

Learn what a step deck trailer is, how it differs from a flatbed, what it hauls, and why it’s the best choice for taller freight.

Learn what brake shoes are on a semi truck, how they work with drum brakes, and why they’re one of the most important parts of your air brake system.

Learn what a kingpin is on a semi truck, how it works with the fifth wheel, why it matters, and how to inspect it for safe trailer connections.

Learn what a brake chamber is, how it works, why it’s essential for air brakes, and what every CDL driver should inspect before every trip.

Learn what a dry van trailer is, what it hauls, why it’s the most common trailer in trucking, and how it compares to reefer and flatbed trailers.