Trucking & Logistics Terms Every Shipper Should Know
Quick answer: The most important trucking terms for shippers to know are dry van, reefer, full truckload (FTL), less-than-truckload (LTL), BOL, detention, and accessorial charges — because these show up on nearly every quote and invoice. Knowing them prevents billing surprises and helps you compare carriers accurately. Below is a complete reference of the terms shippers run into most, organized by category, with a quick-lookup table and a section on the actual numbers behind the jargon.
Key takeaways
- Detention and layover fees are two of the most disputed line items on freight invoices — knowing the difference helps you challenge a charge that's wrong.
- A standard 53-foot dry van holds up to roughly 26 standard pallets and a maximum payload near 45,000 lbs, per typical dry van trailer specifications used across the industry.
- FTL and LTL are not just size categories — they change your transit time, your damage risk, and how the freight is priced.
- Reefer loads require specific temperature language in the rate confirmation (setpoint, continuous vs. cycle-sentry) — vague instructions are the top cause of temperature disputes.
What do FTL, LTL, and dry van actually mean?
Full truckload (FTL) means your freight fills an entire trailer, and the truck runs from your dock straight to the destination with no other shippers' freight on board. Less-than-truckload (LTL) means your shipment shares trailer space with other shippers' freight, gets consolidated at terminals along the way, and typically takes longer because of multiple stops and handling.
Dry van refers to a standard enclosed 53-foot trailer with no temperature control — the workhorse of general freight trucking, used for palletized goods, boxed products, and floor-loaded freight that doesn't need climate control.
Here are the terms that describe equipment and load types:
- Reefer — a refrigerated trailer that maintains a set temperature range, commonly used for produce, dairy, and frozen goods; setpoints on most reefer units run from about -20°F to 70°F.
- Flatbed — an open trailer with no walls or roof, used for oversized, heavy, or irregularly shaped freight like steel or machinery.
- Intermodal — freight that moves across multiple modes (rail and truck, for example) using the same container, often to cut long-haul costs on distances where rail is competitive.
- Drayage — the short-distance trucking move that takes a container from a port or rail yard to a nearby warehouse.
- Palletized freight — goods stacked and secured on pallets for forklift handling, as opposed to floor-loaded freight, which is hand-stacked directly on the trailer floor.
If you're trying to decide which of these fits your shipment, Understanding Freight Class and Shipping Rates walks through how freight class and density affect which option makes financial sense.
What does "BOL" mean and why does every shipment need one?
A BOL (Bill of Lading) is the legal document that accompanies every truckload shipment — it lists the shipper, consignee, carrier, freight description, weight, and piece count, and it's the paperwork that proves the freight was picked up and in what condition. Without a signed BOL, there's no record of what was tendered to the carrier or what condition it was in at pickup, which becomes a problem fast if there's a claim.
Other paperwork terms shippers run into:
- POD (Proof of Delivery) — the signed document confirming freight arrived and in what condition; it's the receiving version of the BOL.
- Rate confirmation — the written agreement locking in the price, pickup/delivery windows, and any special instructions before the truck moves.
- NMFC (National Motor Freight Classification) — the standardized system, published by the National Motor Freight Traffic Association, that assigns freight a class number based on density, handling, and liability, primarily used for LTL pricing.
- Certificate of insurance (COI) — proof of a carrier's liability and cargo coverage, often requested by shippers or their customers before freight moves.
Don't skip this: always get a signed BOL at pickup and check that the piece count, weight, and any damage notes match what's actually on the trailer. A mismatch here is the single biggest reason freight claims get denied later.
What's the difference between detention, demurrage, and layover charges?
These three terms get confused constantly, and each one refers to a different kind of delay charge. Detention is a fee charged when a driver is held at a shipper's or receiver's dock beyond the agreed free time (commonly two hours) for loading or unloading. Demurrage is a similar concept but applies specifically to containers sitting at a port or rail yard past the free time allowed. Layover is a fee for a driver forced to wait overnight or across a weekend, unrelated to dock time — usually tied to appointment scheduling problems.
| Term | What it covers | Who typically charges it |
|---|---|---|
| Detention | Driver held at dock past free loading/unloading time | Carrier, to shipper or receiver |
| Demurrage | Container sitting at port/rail yard past free time | Port or rail terminal, to shipper |
| Layover | Driver stuck waiting overnight/weekend | Carrier, to shipper or broker |
| Accessorial | Any extra service beyond standard pickup/delivery | Carrier, itemized on invoice |
| Deadhead | Miles driven empty with no freight | Absorbed by carrier, sometimes billed |
Accessorial charges is the umbrella term for any add-on fee beyond the base linehaul rate — liftgate service, inside delivery, residential delivery, driver assist, or extra stops all fall under this category. Reading a quote without understanding accessorials is how shippers get surprised at invoice time; we cover this in more detail in How to Vet a Freight Carrier and Avoid Hidden Costs.
What do dispatch and compliance terms like ELD and HOS mean?
HOS (Hours of Service) is the set of federal rules limiting how many hours a truck driver can drive and work before a mandatory rest period, enforced by the Federal Motor Carrier Safety Administration (FMCSA). ELD (Electronic Logging Device) is the hardware required under FMCSA regulation that automatically records a driver's engine hours and HOS compliance, replacing paper logbooks.
Terms shippers hear from dispatch and safety departments:
- DOT number — the identification number issued by the U.S. Department of Transportation to every commercial carrier, used to track safety records and inspections.
- MC number — the operating authority number issued by FMCSA that allows a carrier to legally transport freight for compensation across state lines.
- CDL (Commercial Driver's License) — the license required to operate a commercial truck, with classes and endorsements depending on vehicle type and cargo.
- Preventive maintenance (PM) — scheduled inspection and servicing of a truck and trailer before a breakdown happens, not after.
- DOT inspection — a mandated safety inspection of the vehicle, driver, and paperwork, which can happen roadside or annually at a carrier's terminal.
Compliance has been a live issue industry-wide this year — FMCSA has publicly moved to shut down CDL schools swept into fraud investigations and has faced court challenges over its non-domiciled CDL policy. None of that changes what these terms mean day to day, but it's a reminder that carrier compliance records are worth checking before you book, not after.
What's the difference between "carrier," "broker," and "3PL"?
A carrier is the company that physically owns or operates the truck and moves your freight — this is the entity with the DOT number, the insurance, and the driver. A broker does not own trucks; a broker arranges freight movement by matching shippers with carriers and taking a cut of the rate. A 3PL (third-party logistics provider) is a broader term for a company that manages some or all of a shipper's logistics — which can include brokering freight, warehousing, or coordinating multiple carriers.
This distinction matters more than it sounds like it should, because it determines who's actually accountable if something goes wrong with your load. We broke down how to decide between the two in Trucking Company vs. Freight Broker: Who Should You Hire?
A few related terms:
- Asset-based carrier — a trucking company that owns its own trucks and trailers, as opposed to relying entirely on outsourced capacity.
- Owner-operator — an independent driver who owns their own truck, sometimes leased to a larger carrier, sometimes running under their own authority.
- Dedicated freight — an arrangement where a carrier commits specific trucks and drivers to one shipper's lanes on a recurring basis, rather than running spot freight.
- Spot rate — the price for a single, one-time shipment, negotiated at the time of booking rather than under a standing contract.
- Cross-docking / transloading — moving freight from one trailer to another (or through a warehouse) mid-route, rather than keeping it on the same truck for the entire run.
Quick-reference checklist for reading a freight quote
Before you sign a rate confirmation or accept a quote, run through this list:
- Confirm the equipment type matches your freight — dry van vs. reefer vs. flatbed.
- Check the free time allowed before detention charges apply (commonly two hours, but confirm with the carrier).
- Ask whether the quote includes accessorials like liftgate, inside delivery, or extra stops, or if those are billed separately.
- Verify the carrier's DOT and MC numbers are active before booking, especially with an unfamiliar carrier.
- Request a certificate of insurance if your customer or receiving dock requires proof of coverage.
- For temperature-controlled freight, confirm the setpoint and whether monitoring is continuous or cycle-sentry.
- Get the BOL signed and checked against actual piece count and condition at pickup.
Full truckload dry van and reefer freight is exactly what a general freight carrier in Illinois like PST Logistics runs day in and day out — one truck, one driver, from pickup to delivery, with no cross-docking or transloading in between. If you're comparing quotes and the jargon on one of them doesn't add up, that's usually the first sign worth asking about.
Book a load or get a straight answer on your freight
Understanding the terms is half the job — the other half is working with a carrier who doesn't hide behind them. PST Logistics runs dry van and temperature-controlled truckload freight across all 48 states from Naperville, Illinois, with 24/7 dispatch and the same truck and driver for the entire run. Get a rate quote or request an insurance certificate the same day you call.