Routing Overweight Machinery Around Indian Bridge and Axle Limits
An indivisible heavy machine cannot use the direct inland route; how a route survey, axle configuration and state permits decide the discharge port.
Representative scenario, not a specific client engagement. This page describes how a shipment of this kind is genuinely handled — the constraints, the approach, and where it commonly goes wrong. It does not name or describe a real Transeasy customer. Our two documented project moves are the Mexico container move and the India overweight cargo delivery.
The situation
Heavy machinery for a plant site in India often completes the sea leg without difficulty and then meets its real constraint on the last two hundred kilometres. A press frame, a transformer or a mill housing is an indivisible load: it cannot be split across two trailers to get under a weight limit. The whole mass has to cross every bridge, junction and level crossing between the port and the site on one vehicle combination.
The common failure is ordering the shipment to whichever port looks nearest on a map, then discovering during the route survey that a bridge on the direct road carries a load class below the combined gross weight of tractor, trailer and cargo, or that an overhead line sits below the loaded height. At that point the choices are a much longer route, a different discharge port, or civil works, and all three are cheaper to choose before the sea booking is placed.
What made it difficult
- An indivisible load cannot be broken down, so the entire weight travels on one vehicle combination and every structure on the route has to accept it.
- Over-dimensional and over-weight movement permits are issued state by state, so a route crossing three states needs three approvals with different lead times and conditions.
- Bridge load ratings rather than road surfaces are usually the binding constraint, and a rating applies to the combined gross weight of tractor, trailer and cargo.
- Overhead obstructions such as power lines, footbridges and toll canopies fix the maximum loaded height, which in turn fixes the trailer type that can be used.
How it is approached
The sequence that works is route survey first, discharge port second, sea booking third. A physical survey from the site back towards the candidate ports records every bridge with its load class, every overhead clearance, the turning radii at junctions and the width of the narrowest point. Only once that document exists can anyone say which port the cargo should arrive at, and the answer is frequently not the closest one.
Equipment is then selected to satisfy the worst structure on the chosen route rather than the average one. Spreading the load over more axles reduces load per axle, which is what a bridge rating responds to, while a low bed or modular hydraulic trailer keeps loaded height beneath the lowest overhead obstruction. These objectives conflict, since more axles means a longer combination and a wider turning circle, so the configuration is a compromise settled against the survey.
Permits follow the confirmed configuration, because they are issued against specific axle loads, dimensions and a named route. Applications go to each state authority the movement crosses, and the conditions returned typically restrict travel to night hours, require police or pilot escort, and fix crossing arrangements for particular structures. Lead times vary between states, so the permit calendar rather than the vessel schedule usually sets the realistic delivery date.
On the move itself the work is unglamorous. Pilot vehicles run ahead of the combination, a utility crew lifts or de-energises cables where clearance is marginal, median barriers are temporarily removed at tight junctions, and a surveyor travels with the convoy. Speed is low and a day's progress is measured in tens of kilometres. Planning the halts, including secure overnight parking for a loaded trailer, belongs in the route plan rather than in the execution.
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Takeaways
- For heavy indivisible cargo the inland route dictates the discharge port, so the sea booking should be the last decision rather than the first.
- Bridge load classes respond to axle loading, which makes trailer configuration a structural question rather than a procurement preference.
- Permit lead times across multiple states normally govern the delivery date and cannot be compressed by paying more freight.
- A documented route survey is among the cheapest items in a heavy lift budget and the one that prevents the expensive surprises.
Frequently asked
Begin with a route survey from the site back towards the candidate ports, recording bridge load ratings, overhead clearances and turning radii. That survey decides the discharge port, the trailer configuration and the permit applications. The sea leg is then booked to the port the road route can actually serve. Working in the opposite order is the usual cause of cargo stranded at a port.
Over-dimensional and over-weight movements require permits from the transport authority of each state the route crosses, issued against a specified vehicle configuration, axle loading, dimensions and route. Conditions commonly include night-time-only movement, police or pilot escort, and fixed crossing arrangements for particular bridges. Applications cannot be filed until the trailer configuration is final, so equipment selection has to come first.
Both, and they are set by different structures. Bridge load ratings limit gross and axle weight, which pushes towards more axles. Overhead obstructions such as power lines and footbridges limit loaded height, which pushes towards a low bed with fewer axles. The trailer chosen is the compromise that satisfies the worst constraint of each type on the surveyed route.