ODC and Over-Dimensional Cargo Transport in India
Over-dimensional consignments moved by road across India, with the route surveyed and the permits obtained before the trailer is booked.
When a load becomes over-dimensional
A consignment becomes ODC when it exceeds the dimensions a normal vehicle may carry on Indian roads without special permission — broadly, beyond about 2.6 metres wide, 4.2 metres high measured from the road surface, or overhanging the trailer bed. The height figure is the one that catches people, because it includes the trailer deck itself: a three-metre machine on a 1.5-metre deck is an ODC load even though the machine alone is not.
Once a load is ODC it stops being a trucking exercise and becomes a permissions exercise. The vehicle, the route, the timing and the escort all require approval, and each state on the route grants its own.
The route survey is the whole job
Before anything is booked, the route is driven and measured. What we are looking for is every point where the load will not fit: bridge clearances and load ratings, overhead power and telecom lines, toll plaza widths, roundabout radii, gradients that a heavy tractor cannot pull, and level crossings.
The survey routinely changes the plan. A shorter route with a low rail overbridge loses to a longer one without. Sometimes the answer is to lift cables or dismantle a toll booth for a night, which is arrangeable but needs the utility and the authority booked weeks ahead. Sometimes the honest answer is that the piece must go by sea or be split, and we would rather say that at survey than at 2 a.m. under a bridge that turned out to be 200 millimetres too low.
Permits, escorts and the night-movement rule
ODC movements need permission from the RTO in each state crossed, and the permit specifies the vehicle, the route and often the hours. Most heavy ODC moves are night movements, because that is when the roads are clear enough to use both carriageways at a pinch point.
- State-by-state RTO permits for the exact vehicle and route
- Police escort where the dimensions or the road require it
- Utility coordination for cable lifting and temporary line shutdowns
- Highway authority approval for bridge crossings above the rated load
- Pilot vehicles front and rear, with communication between them
- Insurance covering the load, third-party damage and any infrastructure affected
Equipment, and matching it to the piece
The trailer is chosen for the piece rather than the other way round. Low-bed and semi-low-bed trailers reduce the deck height and buy back clearance under bridges. Hydraulic modular trailers spread very heavy loads across many axles, and can be configured in width and length to suit. Extendable trailers carry long pieces such as blades or vessels.
Axle count matters as much as capacity: a load within the trailer’s rated weight can still be refused if the axle loading exceeds what a bridge on the route will take. That is a calculation, not a guess, and it is done before the permit application because the permit is granted against the axle configuration.
Where ODC moves go wrong
In our experience the failures are rarely dramatic. They are a permit that expired because the load left two days late; a cable that was surveyed but not booked for lifting; a piece whose actual dimensions differed from the drawing because someone measured the equipment and not the packing frame; or a consignee with no crane and no hardstanding to receive it on.
All four are prevented the same way — by measuring the packed piece rather than the drawing, by sequencing the permits against a realistic departure, and by surveying the delivery site as carefully as the route.
Asked often about this service
How long does an ODC move take to arrange?
Two to four weeks for a routine interstate move, longer where multiple states, utility shutdowns or bridge approvals are involved. The transport itself is often the shortest part: a night movement covering 300 kilometres may take three nights, while the permits took three weeks.
Can you handle the lifting at both ends?
Yes — crane selection, ground-bearing assessment and the lift plan are part of the scope. The delivery site matters more than people expect: a piece that travelled 800 kilometres safely can be stuck at the gate because the hardstanding will not take a crane outrigger.
What if the piece is too large for Indian roads entirely?
Then it moves by sea or river, or it is split. Coastal movement to a port near the site, followed by a short road leg, is often cheaper and always lower-risk than a very long ODC haul. We will price both honestly rather than defaulting to the one we can arrange fastest.
Who is liable if infrastructure is damaged?
The transporter, and by extension the consignment. That is why the survey and the insurance both matter: cover must extend to third-party infrastructure, not just the cargo, and the survey is what stops the claim happening in the first place.