By Luis Lopez, AI transportation consultant, CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast
Most of the attention in an import container move goes to the front half: clearing customs, getting the box out of the terminal, and delivering it to the warehouse. Once the container is unloaded, many shippers consider the job finished. The ocean carrier does not. Until the empty container is back where the carrier wants it, the move is still open, and charges can still accrue.
The back half of the move, returning the empty, is where a surprising share of drayage cost and friction lives. This article explains how empty returns work, how terminals schedule them, what dual transactions and street turns are, and how detention and dry runs fit in.
Where Empties Go
An empty container does not automatically return to the terminal where it was picked up. Ocean carriers decide where they want their empty equipment based on where they need it next. The return location might be the original terminal, a different terminal in the same port, or an off-dock container yard or depot.
Return instructions can change, sometimes daily. A carrier that has too many empties at one terminal may redirect returns to another location. A terminal that is congested may stop accepting empties for a particular carrier or container size for a period of time. For the trucker, that means checking the current return location before every return trip, not relying on what was true when the container was picked up.
Return Appointment Systems
Many container terminals require appointments for both pickups and returns, including empty returns. Truckers book a time window through the terminal’s appointment system, and the gate will generally process the return only if the appointment, the container number, and the equipment details match. The guide to port terminal appointments explains how these systems work in more detail.
Empty return appointments can be scarce during busy periods. When a trucker cannot get a return appointment, the empty sits at the customer’s facility or in the trucker’s yard, and the container clock keeps running. That delay is not always anyone’s fault, but someone usually ends up paying for it, so it helps to document every attempt to book a return.
Dual Transactions
A dual transaction means doing two things in one terminal visit: returning an empty and picking up a load, or dropping an export and pulling an import. Instead of a truck entering the terminal empty-handed to pick up a container and leaving the terminal empty-handed after a return, both legs carry equipment.
Dual transactions save time and reduce empty miles. They also depend on coordination. The trucker needs an empty return appointment and a pickup appointment that line up, the returned container must be accepted at that terminal, and the next load must be available. When everything aligns, the cost per move drops. When it does not, the trucker may need to make separate trips.
Street Turns
A street turn takes the dual-transaction idea one step further. Instead of returning an import empty to the terminal and having an exporter pick up a different empty, the import empty goes directly from the importer to a nearby exporter, who loads it and sends it back to the port as an export.
The benefits are clear:
- One fewer trip to the terminal for the empty return.
- One fewer trip to pick up an empty for the export.
- Less congestion at terminal gates and fewer empty truck miles.
- Potentially less detention exposure for the importer, depending on how the carrier treats the reuse.
Street turns require approval from the ocean carrier that owns or controls the container. The carrier needs to agree that its empty can be used for that export booking, and the container must be suitable for the exporter’s cargo. Container type, size, condition, and the carrier on the export booking all have to match. Many carriers process street turn requests through electronic interchange platforms, and the equipment interchange between the parties still has to be properly documented.
Before loading, the exporter should inspect the container just as they would one picked up from a depot. The guide on export container inspection before loading lists what to check. An import empty that arrives dirty, damaged, or with leftover odors is not a good candidate for food or sensitive goods.
Street turns do not happen unless someone actively matches import empties with export bookings. That takes visibility into both sides, which is why they are more common among truckers and logistics providers that handle both import and export freight in the same market.
Per Diem and Detention Exposure
Detention, often called per diem in drayage, is charged for the time a carrier’s container is out of the terminal beyond the free days allowed. For an import, the clock typically runs from the time the full container leaves the terminal until the empty is returned or, in an approved street turn, until the carrier records the reuse.
Several things on the back half of the move extend per diem:
- Slow unloading at the consignee’s facility.
- Waiting for a trucker to pick up the empty from the customer.
- No available empty return appointments.
- A terminal refusing empties for that carrier or size.
- Return location changes that send the trucker to a different facility.
If the container sits on a chassis while it waits, chassis charges usually run alongside per diem. Shippers who want to dispute charges caused by terminal refusals or unavailable appointments need records. The guide on demurrage vs. detention covers how these charges are calculated and how to avoid them.
Dry Runs
A dry run happens when a trucker arrives to complete a move and cannot, through no fault of their own. On the empty return side, common causes include a terminal that refuses the empty, a return location that changed after the truck was dispatched, or an appointment that does not match the system. The trucker has spent time, fuel, and a driver’s hours with nothing to show for it, so a dry run charge is common.
Dry runs are often avoidable with better information. Confirming the return location and terminal acceptance status before dispatch, rather than after the truck is already in line, prevents most of them.
How Shippers Can Help
Shippers have more influence over the back half of the move than they might think:
- Unload containers promptly and tell the trucker the moment the empty is ready.
- Know the free time on each container and plan unloading around it.
- Ask your trucker whether street turns are possible in your market and lanes.
- Keep records of return attempts, refusals, and appointment availability.
- Review detention invoices against the actual timeline of each container.
Where AI Helps
The empty return problem is largely an information problem. AI tools can monitor return location notices, terminal acceptance updates, and appointment availability, then alert dispatchers before a truck is sent to the wrong place. Matching tools can compare import empties with export bookings by carrier, size, and location to suggest street turn candidates. Document extraction tools can assemble the timeline of each container, including gate times and refusal notices, to support detention disputes. The value depends on accurate data feeds and on a person confirming the match before equipment moves.
The front half of a container move gets the attention, but the back half often decides whether the move was profitable. Treat the empty return as part of the job, not an afterthought.
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About the author: Luis Lopez is a Miami-based AI transportation consultant and logistics entrepreneur, the CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast.
