Land & Road Freight
Over-Dimensional Cargo (ODC) by Road: A Practical Guide
5 min read
Over-dimensional cargo (ODC) is freight that exceeds normal legal limits for length, width or height. Machinery, transformers, wind-turbine parts and industrial plant often fall into this category and need specialised road transport.
What counts as ODC
ODC is cargo that projects beyond the standard dimensions a vehicle can legally carry on public roads. Because it can affect other traffic and infrastructure, it is regulated and needs special handling, equipment and approvals.
Equipment, permits and planning
- Specialised trailers such as low-bed, multi-axle or hydraulic modular trailers.
- Movement permits from the relevant road authorities.
- Pilot or escort vehicles, and sometimes police escort, for safety.
- A route survey to check bridges, overpasses, turns and clearances.
Why planning is everything
ODC moves are slow and tightly planned, often travelling at night or off-peak. A route survey done in advance avoids blocked bridges, low clearances and tight turns that could halt the load. Good planning is the difference between a smooth move and an expensive standstill.