Container dwell time is the number of days a container spends at a port or rail terminal between being unloaded from the ship and leaving by truck or train. Short dwell times mean cargo flows smoothly; rising dwell times signal congestion, and they often lead to storage charges, demurrage and delays for shippers.
Key takeaways
- Two kinds of dwell: truck dwell (containers leaving by road) and rail dwell (containers leaving by train).
- Rail dwell at West Coast ports is watched closely because most imports go inland by train.
- Causes of high dwell: rail capacity, labour disruptions, weather, customs holds and slow pick-ups.
- Shippers can cut their own dwell by clearing customs early and booking drayage in advance.
Where to find dwell-time data
- Transport Canada publishes supply chain performance indicators, including container dwell times at major ports.
- Port authorities (Vancouver Fraser Port Authority, Port of Montreal, Halifax and others) share operational updates.
- Terminal operators and railways post service advisories.
What drives dwell time at each port
| Port | Main drivers |
|---|---|
| Vancouver | Rail capacity to inland Canada, terminal density, weather in the mountains |
| Prince Rupert | Almost all cargo leaves by rail, so rail performance dominates |
| Montreal | Truck and rail balance, winter conditions, labour stability |
| Halifax | Rail connections to Central Canada, vessel bunching |
| Saint John | Equipment and system availability, rail connections |
Read more about rail congestion at Vancouver terminals and vessel congestion at the Port of Vancouver.
Why dwell time matters to shippers
- Costs: longer dwell means more storage and demurrage. See demurrage and storage fees.
- Inventory: delayed containers mean stock-outs or expensive expedited freight.
- Surcharges: sustained congestion can trigger port congestion surcharges.
How to reduce your containers' dwell time
- Pre-clear customs and have your CARM account and security in place.
- Release freight early by paying charges before arrival.
- Book drayage before the vessel arrives. Carriers in Vancouver, Montreal, Halifax and Prince Rupert can plan pick-ups.
- Use pre-pulls and off-dock yards when terminal appointments are scarce.
- Choose the right routing: truck-destined boxes clear faster when your warehouse is near the port.
- Keep a backup port for peak season.
Frequently asked questions
What is a good container dwell time?
It varies by port, but shorter is better. A dwell time of a few days is generally considered healthy for truck-bound containers.
What is rail dwell time?
The time an import container waits at the port before leaving on a train to an inland destination.
Who publishes Canadian port dwell times?
Transport Canada publishes supply chain indicators, and port authorities and terminal operators share operational updates.
Why do dwell times rise in winter?
Cold weather slows rail operations, especially through the mountains, and can reduce terminal productivity.
How can I avoid delays when dwell times are high?
Clear customs early, book drayage in advance and consider pre-pulling containers to a carrier's yard.