Relay logistics in long-haul trucking divides a long route into shorter segments. Different drivers or tractors handle successive legs, transferring the trailer, container or load at relay hubs or exchange points. The objective is to keep freight moving while reducing the need for one driver to stay away from home for multi-day trips.
How a Relay Network Works
- Long-haul lane is divided into feasible driver segments.
- Relay hubs/exchange points are positioned along the corridor.
- Driver A moves the load to a hub.
- Driver B takes the load onward while Driver A returns toward base or takes another load.
- The process repeats until destination.
Potential Benefits
- Near-continuous freight movement.
- Shorter driver trips and fewer overnight stays.
- Better driver/home-time patterns.
- Potentially improved asset utilization.
- Possibility of shared hub capacity in collaborative networks.
Trade-Offs
- More handoffs and synchronization points.
- Hub-capacity and location requirements.
- Missed connections can propagate delay.
- Trailer/container availability must be controlled.
- Demand imbalance can create empty repositioning.
Network Design Questions
- Where should relay points be located?
- How much throughput capacity is needed?
- Which lanes have sufficient volume?
- What driver-hours and rest rules apply?
- How are delayed loads re-routed?
- Who owns trailers and hub inventory?
KPIs
- Transit time
- Relay connection success %
- Driver hours/overnight stays
- Empty-kilometre %
- Hub dwell time
- Cost per load/km
- On-time delivery
Recent peer-reviewed research continues to model hub-based relay networks as a way to balance freight speed, cost, driver working conditions and emissions. The concept is promising, but performance depends heavily on network density, hub capacity and reliable handoffs.
References: Hu, Askin & Hu (2019), “Hub relay network design for daily driver routes,” International Journal of Production Research; Wen et al. (2026), “Relay transport network design for sustainable trucking industry considering carbon emissions and driver working conditions,” Transport Policy.
