Cold Chain & Freight Glossary
Your comprehensive guide to cold chain logistics, reefer transportation, and freight shipping terminology. 127 terms and counting.
A
Accessorial Charges
Additional fees beyond the base freight rate for extra services such as lift-gate delivery, inside delivery, detention, or temperature monitoring.
CostsAdverse Driving Conditions
An HOS exception that grants drivers up to two additional hours of driving time when they encounter unexpected weather, road, or traffic conditions.
HOSAll-In Rate
A single quoted price that includes the base freight rate plus all surcharges and accessorial fees, showing the total cost to ship.
CostsAPI Integration
The connection of different software systems through programming interfaces, enabling automated data exchange between logistics platforms.
TechnologyB
Backhaul
A return trip freight load that a carrier picks up at or near their delivery destination, reducing empty (deadhead) miles on the way back.
OperationsBase Rate
The core transportation charge for moving freight from origin to destination, before any surcharges or accessorial fees are added.
CostsBill of Lading (BOL)
A legal document issued by a carrier to a shipper that details the type, quantity, and destination of goods being transported.
DocumentationBill of Lading (BOL)
A legal document issued by a carrier to a shipper that details the type, quantity, and destination of goods being transported.
DocumentationBlockchain in Supply Chain
A distributed ledger technology that creates tamper-proof records of supply chain transactions and product movements.
TechnologyBobtail
A tractor unit operating on the road without a trailer attached, typically when repositioning to pick up or drop off a trailer.
OperationsBroker-Carrier Agreement
A contract between a freight broker and carrier defining the terms, responsibilities, and liabilities governing their business relationship.
DocumentationC
Calibration
The process of verifying and adjusting measurement instruments against a known standard to ensure accurate readings.
ComplianceCargo Insurance
Insurance coverage that protects the value of freight against loss or damage during transportation, beyond the carrier's standard liability.
DocumentationCarrier Packet
A collection of documents a carrier must submit to a broker for approval before being authorized to haul freight.
DocumentationCDL (Commercial Driver's License)
A specialized driver's license required to operate large, heavy, or hazardous material commercial motor vehicles on public roads.
DriverCertificate of Insurance (COI)
A document issued by an insurance company verifying that a carrier has active insurance coverage meeting specified minimum requirements.
DocumentationCold Chain
The unbroken series of refrigerated production, storage, and distribution activities that maintain a product within a specified temperature range.
LogisticsCold Chain Validation
The documented process of proving that a shipping method consistently maintains required temperatures under defined conditions.
ComplianceCommodity Classification
The process of categorizing freight by product type to determine applicable shipping rates, handling requirements, and regulatory obligations.
LogisticsConsolidation
Combining multiple smaller shipments from one or more shippers into a single larger shipment for more efficient transportation.
OperationsContinuous Move
A logistics strategy that chains multiple loads together in sequence to keep a truck continuously loaded, minimizing empty miles between shipments.
OperationsContract Rate
A pre-negotiated freight rate between a shipper and carrier, typically valid for 6 to 12 months, offering price stability and capacity assurance.
CostsCross-Docking
A logistics practice where inbound freight is unloaded and directly transferred to outbound trucks with minimal or no warehousing time.
OperationsCSA Score (Compliance, Safety, Accountability)
A safety measurement system used by FMCSA to identify high-risk carriers and prioritize them for interventions such as inspections and investigations.
ComplianceCubic Capacity
The total interior volume of a trailer or container measured in cubic feet, representing the maximum space available for freight.
LogisticsD
Data Logger
A small electronic device placed inside shipments to continuously record temperature, humidity, or other conditions throughout transit.
EquipmentDeadhead
Miles driven by a truck with an empty trailer, generating no revenue for the carrier while still incurring fuel and operating costs.
OperationsDeadhead Miles
Miles driven by a truck without any revenue-generating freight, typically when repositioning to pick up the next load.
OperationsDeconsolidation
The process of breaking down a consolidated shipment into individual orders for delivery to multiple final destinations.
OperationsDetention Time
The time a truck is held at a facility beyond the agreed-upon free time for loading or unloading, usually resulting in additional charges.
CostsDigital Freight Matching
Technology platforms that use algorithms to automatically match available freight loads with available carrier capacity.
TechnologyDimensional Weight
A pricing method that calculates shipping cost based on package volume rather than actual weight when the package is large but lightweight.
LogisticsDOT Inspection
A roadside or facility safety inspection conducted by federal or state enforcement officers to verify compliance with commercial vehicle regulations.
ComplianceDrop Trailer
A logistics arrangement where the carrier leaves a trailer at a facility for loading or unloading and returns later to retrieve it.
OperationsDry Van
An enclosed, non-refrigerated trailer used for shipping goods that do not require temperature control during transit.
EquipmentDVIR (Driver Vehicle Inspection Report)
A mandatory report completed by commercial vehicle drivers at the end of each driving day documenting the condition of the vehicle and any defects found.
ComplianceDwell Time
The total time a truck spends at a facility for loading or unloading, including wait time before and after the actual loading process.
OperationsE
EDI (Electronic Data Interchange)
A standardized electronic format for exchanging business documents like orders, invoices, and shipping notices between trading partners.
TechnologyELD (Electronic Logging Device)
A federally mandated device that automatically records a truck driver's hours of service, replacing paper logbooks.
EquipmentEutectic Plates
Reusable metal plates filled with a solution that freezes and releases cold energy slowly, providing passive refrigeration for deliveries.
EquipmentF
First-Mile Pickup
The initial leg of a shipment's journey from the point of production or storage to the first transportation hub or carrier terminal.
LogisticsFlatbed Trailer
An open trailer with no sides or roof, used for transporting oversized or heavy freight that cannot fit in enclosed trailers.
EquipmentFleet Management Software
A technology platform that helps carriers manage their vehicles, drivers, compliance, maintenance, and operations from a centralized system.
FleetFMCSA Part 395
The section of federal motor carrier safety regulations that specifically governs hours of service for commercial vehicle drivers.
ComplianceFood-Grade Trailer
A trailer that meets sanitation and safety standards for transporting food products, with cleanable surfaces and no contamination risk.
ComplianceFreight Audit
The process of reviewing and verifying carrier invoices against shipping contracts and actual service delivered to ensure billing accuracy.
OperationsFreight Claim
A formal demand for financial reimbursement filed against a carrier when freight is lost, damaged, or delayed during transportation.
DocumentationFreight Class
A standardized classification system from 50 to 500 that categorizes commodities for LTL pricing based on density, handling, stowability, and liability.
LogisticsFreight Consolidator
A logistics company that combines shipments from multiple shippers into full truckloads for more efficient and cost-effective transportation.
LogisticsFreight Density
The weight per cubic foot of a shipment, calculated by dividing total weight by total volume, used to determine freight class and pricing.
LogisticsFSMA (Food Safety Modernization Act)
The most sweeping reform of US food safety law in over 70 years, signed in 2011, shifting the focus from responding to contamination to preventing it.
RegulationsFTL (Full Truckload)
A shipping mode where a single shipper fills an entire trailer with their freight, contracting for the full capacity of the vehicle.
Shipping ModesFuel Surcharge
A variable charge added to freight rates that adjusts based on current diesel fuel prices, separate from the base transportation rate.
CostsG
Genset (Generator Set)
A portable diesel generator mounted on a trailer chassis that provides electrical power to a refrigerated container during road transport.
EquipmentGeofence
A virtual geographic boundary created using GPS technology that triggers automated alerts or actions when a vehicle enters or exits the defined area.
TechnologyGMP (Good Manufacturing Practices)
Regulations and guidelines ensuring products are consistently produced and controlled according to quality and safety standards.
ComplianceGPS Tracker
A satellite-based tracking device mounted on trucks or trailers that provides real-time location and often temperature data to shippers.
EquipmentGross Vehicle Weight (GVW)
The total weight of a truck including the tractor, trailer, fuel, driver, and all cargo, which must not exceed legal limits.
LogisticsH
HACCP (Hazard Analysis Critical Control Points)
A systematic preventive approach to food safety that identifies physical, chemical, and biological hazards in production and designs measures to reduce risks.
RegulationsHACCP Plan
A written food safety document that identifies hazards, critical control points, and corrective actions specific to a company's operations.
ComplianceHOS (Hours of Service)
Federal regulations that limit the number of hours a commercial motor vehicle driver may operate to prevent fatigue-related accidents.
ComplianceHub-and-Spoke
A distribution model where freight flows through a central hub before being distributed to outlying spoke locations.
LogisticsI
IFTA (International Fuel Tax Agreement)
An agreement among U.S. states and Canadian provinces that simplifies fuel tax reporting for carriers operating across multiple jurisdictions.
FleetInsulated Container
A shipping container with insulated walls that slows heat transfer, used with or without active cooling for temperature-sensitive cargo.
EquipmentIntermodal Container
A standardized shipping container designed to transfer between truck, rail, and ship without unloading the cargo inside.
EquipmentIoT Sensors
Internet-connected devices that monitor environmental conditions like temperature, humidity, and location throughout the cold chain.
TechnologyL
Last-Mile Delivery
The final leg of a shipment's journey from a distribution hub to the end customer, often the most complex and costly segment.
LogisticsLayover Charge
A fee charged when a driver must wait overnight or for an extended period before a pickup or delivery appointment can be completed.
CostsLiftgate
A hydraulic platform attached to the rear of a truck that raises and lowers freight between ground level and the trailer floor.
EquipmentLive Loading
A loading arrangement where the driver and truck wait at the dock while the trailer is loaded or unloaded, as opposed to drop trailer.
OperationsLoad Board
An online marketplace where brokers and shippers post available freight and carriers search for loads that match their equipment and routes.
TechnologyLoad Planning
The strategic arrangement of freight within a trailer to maximize space utilization, maintain proper airflow, and ensure safe transport.
OperationsLoad-to-Truck Ratio
A market indicator measuring the number of available freight loads relative to the number of available trucks, reflecting supply-demand balance.
MarketLot Tracking
The practice of assigning unique identifiers to production batches and following them through the supply chain for quality and recall purposes.
ComplianceLTL (Less Than Truckload)
A shipping mode where multiple shippers share trailer space, each paying for only the portion of the trailer their freight occupies.
Shipping ModesLumper Fee
A fee charged by third-party laborers at warehouses or distribution centers for loading or unloading freight from a truck.
OperationsLumper Fees
Charges paid to third-party laborers who load or unload freight at a warehouse or distribution center, rather than having the truck driver perform the work.
CostsM
Machine Learning in Logistics
AI systems that learn from historical logistics data to improve predictions, automate decisions, and optimize cold chain operations.
TechnologyMilk Run
A delivery route where a single truck makes multiple pickups or deliveries in a circular pattern, returning to the origin point.
OperationsMinimum Charge
The lowest amount a carrier will charge for a shipment, regardless of the calculated rate based on weight, distance, or volume.
CostsO
OBD-II (On-Board Diagnostics)
A standardized vehicle diagnostic system that provides access to engine data, fault codes, and emission monitoring through a universal connector port.
TechnologyOwner Operator
An independent truck driver who owns or leases their own truck and operates as an independent contractor rather than a company employee.
DriverP
Pallet Exchange
A system where the receiver provides an equal number of empty pallets to replace the loaded pallets being delivered, maintaining the shipper's pallet inventory.
OperationsPallet Jack
A wheeled tool used to lift and move palletized freight within trailers, warehouses, and loading docks.
EquipmentPayload Capacity
The maximum weight of freight a truck or trailer can legally carry, calculated by subtracting the vehicle's tare weight from the gross vehicle weight limit.
LogisticsPer-Mile Rate
A freight pricing method where the cost is calculated by multiplying a rate per mile by the total distance of the shipment.
CostsPersonal Conveyance
The movement of a commercial vehicle for personal use while off duty, which does not count against a driver's hours of service.
HOSPhase-Change Materials (PCM)
Substances engineered to absorb or release thermal energy at specific temperatures, used for passive temperature control in shipping.
EquipmentPool Distribution
A shipping strategy where a full truckload is sent to a regional hub, then broken into smaller deliveries for multiple nearby destinations.
LogisticsPre-Cooling
The process of lowering a product or trailer temperature to the required shipping temperature before loading, essential for maintaining cold chain integrity.
OperationsPre-Trip Inspection
A systematic check of a commercial vehicle's safety-critical components performed by the driver before operating the vehicle each day.
FleetPredictive Analytics
The use of historical data and statistical models to forecast future events like demand patterns, pricing trends, and potential disruptions.
TechnologyProof of Delivery (POD)
A signed document confirming that a shipment was delivered to the consignee in the specified condition at the noted date and time.
DocumentationR
Rate Confirmation
A written agreement between a broker and carrier specifying the rate, terms, and conditions for a specific shipment.
DocumentationReal-Time Tracking
Continuous monitoring and reporting of a shipment's location and condition as it moves through the supply chain.
TechnologyRecall Procedures
Documented protocols for quickly identifying, locating, and removing unsafe or contaminated products from the supply chain.
SafetyReconsignment Fee
A charge applied when a shipment's delivery destination is changed after the freight is already in transit.
CostsReefer Fuel Surcharge
An additional charge applied to refrigerated shipments to cover the cost of diesel fuel consumed by the trailer's refrigeration unit during transit.
CostsReefer Trailer
A semi-trailer with integrated refrigeration, typically 53 feet long, designed to be pulled by a tractor and maintain precise temperature control.
EquipmentReefer Truck
A refrigerated truck or trailer equipped with a built-in cooling unit to transport temperature-sensitive goods.
EquipmentReefer Unit
The self-contained refrigeration system mounted on a trailer or truck body that maintains controlled temperatures for transporting perishable goods.
EquipmentRoute Optimization
The use of algorithms and software to determine the most efficient delivery routes considering distance, time, capacity, and constraints.
OperationsS
Sanitary Transportation Rule
An FSMA regulation establishing requirements for vehicles, operations, training, and records in food transportation to prevent contamination.
ComplianceShipment Visibility
Real-time tracking and status information about a shipment's location, condition, and estimated arrival throughout the transportation process.
LogisticsShipper-Carrier Agreement
A direct contract between a shipper and carrier outlining transportation terms, rates, and service requirements without a broker intermediary.
DocumentationShort-Haul Exemption
An HOS exception that relieves qualifying short-haul drivers from ELD and detailed record-of-duty-status requirements.
HOSSleeper Berth
A compartment in a truck cab equipped with a bed, allowing drivers to rest and fulfill off-duty requirements without leaving the vehicle.
HOSSplit Sleeper Berth
An HOS provision that allows drivers to split their required 10-hour off-duty period into two separate rest periods using the sleeper berth.
HOSSpot Rate
The current market price for a one-time shipment, reflecting real-time supply and demand conditions in the freight market.
CostsStaging Area
A designated space in a warehouse or dock where freight is organized and prepared for loading onto outbound trucks.
OperationsStop-Off Charge
A fee charged for each additional pickup or delivery location beyond the standard single origin and single destination.
CostsStretch Wrap
Plastic film applied around palletized freight to secure and stabilize the load for safe handling and transportation.
EquipmentT
Tandem Axle
A pair of axles positioned close together on a truck or trailer that distributes weight more evenly and increases load-carrying capacity.
EquipmentTare Weight
The weight of an empty truck, trailer, and fuel without any cargo, used to calculate how much freight can be legally loaded.
LogisticsTelematics
Technology that combines GPS tracking, onboard diagnostics, and wireless communication to transmit real-time vehicle data to fleet managers.
FleetTemperature Certificate
A document recording the temperature conditions of a shipment at key points, used for compliance and quality assurance purposes.
DocumentationTemperature Excursion
Any deviation of product temperature outside its specified acceptable range during storage or transportation.
QualityTemperature Mapping
A study that measures temperature distribution at multiple points within a storage or transport space to identify hot and cold spots.
ComplianceThermal Blanket
An insulating cover placed over freight to provide passive temperature protection during transit without active refrigeration.
EquipmentTMS (Transportation Management System)
Software that helps shippers and logistics companies plan, execute, and optimize the movement of freight across their supply chain.
TechnologyTONU (Truck Ordered Not Used)
A fee charged when a carrier dispatches a truck for a scheduled pickup but the load is canceled or not ready, compensating for the wasted trip.
CostsTraceability
The ability to track a product's movement through all stages of the supply chain, from raw material to final consumer.
ComplianceW
W-9 Form
An IRS tax form that carriers provide to brokers and shippers for tax identification and 1099 reporting purposes.
DocumentationWMS (Warehouse Management System)
Software that controls and optimizes warehouse operations including receiving, storage, picking, packing, and shipping of goods.
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