TEMPERATURE-CONTROLLED TRANSPORT
Reefer Drayage Carriers
Reefer drayage refers to the short-haul trucking of refrigerated (reefer) containers that require continuous temperature control during transport. These containers carry perishable food products, pharmaceuticals, temperature-sensitive chemicals, and other cargo that must remain within defined temperature ranges from the moment it leaves the vessel to the moment it arrives at a temperature-controlled warehouse or processing facility. Reefer drayage is a specialized segment of the port drayage market that requires carriers with the right equipment, monitoring systems, and operational expertise to protect the cold chain throughout the move.
What is reefer drayage and what cargo does it cover?
A refrigerated container (commonly called a reefer) is an intermodal container with a built-in refrigeration unit powered by a generator or connected to shore power. Reefer containers maintain temperatures ranging from well below freezing (for frozen seafood, ice cream, or frozen meat) to just above freezing (for fresh produce) to above-ambient cooling (for some pharmaceuticals and chemicals). The cargo categories that move in reefer containers through US ports are diverse. Tropical fruit is the largest segment by volume: bananas from Ecuador and Colombia, pineapples from Costa Rica and the Philippines, mangoes and avocados from Mexico and Peru, and citrus from Spain and South Africa all arrive at US ports in reefer containers. Meat and seafood (frozen beef from Australia and New Zealand, shrimp from Southeast Asia, salmon from Chile) require below-freezing temperatures. Pharmaceuticals and medical products represent a smaller but high-value and highly regulated segment. Wine and premium beverages require controlled temperature to avoid oxidation and spoilage during transit. Dairy products including cheese, butter, and specialty ingredients round out the major categories. Reefer drayage differs from standard drayage in several ways. The carrier must have a truck with a compatible power take-off (PTO) or generator connection to maintain the container's refrigeration unit while the container is on the chassis. Monitoring equipment to track container temperature during transit is increasingly required by cargo owners. Drop-yard capabilities with shore power connections are essential when a reefer container needs to wait before its appointment or delivery window. Drivers must understand how to connect and verify the reefer unit, check temperature readings, and recognize malfunction indicators.
Why temperature control during drayage is critical
For perishable cargo, the drayage move is one of the most vulnerable points in the cold chain. The total transit time from vessel discharge to distribution center may be 4 to 12 hours for a port drayage move, but this window is enough for temperature excursions to occur if the carrier lacks proper equipment or procedures. A temperature excursion during drayage can result in partial or total cargo rejection at the destination warehouse, with costs borne by the shipper or the drayage carrier depending on the contract terms. For pharmaceutical cargo, a single temperature excursion can render an entire container load of product unsuitable for sale. Regulatory requirements for pharmaceutical cold chain transport (GDP guidelines, FDA 21 CFR requirements) specify that temperature monitoring records must be maintained throughout the supply chain, including the drayage segment. A reefer carrier without monitoring equipment cannot provide the required documentation. For food safety compliance under the FDA Food Safety Modernization Act (FSMA), importers are required to maintain control over the cold chain for temperature-sensitive food shipments, which extends to their drayage carriers. Shippers cannot fully delegate cold chain responsibility to the drayage carrier and remain compliant: they must verify that the carrier has appropriate equipment and procedures in place. Using a carrier that specializes in reefer drayage, maintains monitoring records, and can provide temperature data upon request is not just best practice: for regulated cargo categories, it is a compliance requirement.
Reefer Drayage Carrier Requirements
- Reefer-Compatible Equipment: Carriers must have chassis and trucks capable of powering the container's refrigeration unit during transport, either through a power take-off (PTO) connection or a separate generator unit.
- Temperature Monitoring: Responsible carriers maintain continuous temperature monitoring during transit and can provide temperature logs upon delivery, as required by pharmaceutical GDP standards and increasingly by food safety regulations.
- Shore Power Drop Yards: Carriers handling reefer containers that need to stage before delivery must have access to a yard with shore power connections to maintain refrigeration without running a generator.
- Driver Training: Drivers must know how to connect and verify reefer units, check temperature controller setpoints and readings, and respond appropriately to reefer alarms or malfunctions during transit.
How to find reefer drayage carriers on DrayLocator
DrayLocator lists drayage carriers across all major US container ports. For reefer-specific drayage, focus your search on carriers in port regions with high perishable volumes: Miami (tropical produce from Latin America), Seattle/Tacoma (seafood and produce exports, Asian produce imports), Los Angeles/Long Beach (largest overall reefer volume), and the Northeast (European dairy and wine imports). When evaluating a carrier for reefer work, confirm that their trucks are equipped with reefer power connections, that they have shore power drop-yard capability, and that they can provide temperature monitoring records. Use DrayLocator to identify carriers in your port region, then qualify them directly for reefer-specific capabilities before booking.
Carriers in This Category
View all 3,519 ›Frequently Asked Questions
What equipment does a reefer drayage carrier need?
A reefer drayage carrier needs trucks equipped with a power take-off (PTO) or a separate generator ("genset") to power the container's built-in refrigeration unit while the container is in transit. They also need chassis rated for reefer container weight and length. Ideally, they will have access to a drop yard with electrical shore power connections for containers that need to stage before delivery. Temperature monitoring equipment and logging capabilities are increasingly required by cargo owners for documentation purposes.
Which US ports handle the most reefer container volume?
The Port of Los Angeles and Long Beach collectively handle the largest reefer container volume in the US, driven by produce imports from Latin America and Asia and produce exports from California agriculture. PortMiami handles a high concentration of tropical fruit and flower imports from Central and South America. The Port of Seattle/Tacoma handles significant seafood and agricultural product volumes. Port of New York/New Jersey handles European dairy, wine, and seafood imports.
What is a temperature excursion and why does it matter?
A temperature excursion occurs when a reefer container's cargo temperature goes outside the specified range during transport. For frozen cargo, this may mean partial thawing. For fresh produce, it can accelerate ripening, mold growth, or chilling injury. For pharmaceuticals, even a brief excursion outside the specified range can render product unsaleable under FDA and cGMP standards. Temperature excursions during drayage are often caused by equipment failure, improper connection of the reefer unit, or delays that extend transit beyond the cargo's tolerance.
Do reefer containers need to be connected to power during drayage?
Yes. A reefer container's refrigeration unit must be powered continuously during transport to maintain the required temperature. On a truck, this is done through a power take-off (PTO) connection from the truck engine or through a separate genset unit that runs independently. When a container is staged at a drop yard between pickup and delivery, it must be connected to shore power to maintain temperature. Allowing a reefer container to sit without power causes the temperature to drift toward ambient, risking cargo damage.
Related Services
Find Carriers by Port