01Why measure a loaded truck
Vehicle fill is where transport money hides. A truck that leaves at 70% volumetric fill hauls 30% air at full cost — fuel, driver, tolls and depreciation all charge by the trip, not by the cubic metre. Yet most operations know fill only as a driver's impression. A truck dimensioning system replaces the impression with a measurement: the cargo space occupied, the space remaining, and a per-vehicle record that planners, customers and auditors can all work from.
The same record serves linehaul billing. Where transport is sold by volume, the GS400's load record is the measurement both sides can point to; where it is sold by the vehicle, fill-rate history is how the next contract's vehicle size and departure frequency get negotiated honestly.
02How the GS400 works
The GS400 is the vehicle-level member of Goodscan's large-freight measuring family, alongside the GS300 pallet dimensioners. Its vision rig surveys the cargo space of the loaded vehicle and reconstructs the load's occupied volume — the stacked, real-world shape of the freight as loaded, not the sum of the pallet footprints it arrived on. The gap between those two numbers is exactly what load planning needs: pallet sums ignore stacking loss, voids above irregular loads, and the unusable corners every real load leaves.
Measured at the dock, per vehicle, the record attaches to the trip: route, vehicle, departure time, fill. Over a season, that data set shows which routes chronically run part-empty, which customers' freight stacks badly, and where a smaller vehicle or a consolidated departure would carry the same freight for less.
03Where truck dimensioning fits
Linehaul and shuttle operations use the GS400 at the loading dock as the last measuring point before departure. 3PL and contract logistics operators use its records to bill volume-based transport and to evidence utilisation to customers. Networks with pallet measuring upstream — GS300Pro systems at intake and outbound — use the GS400 to close the loop: freight measured on the way in, pallets measured at the dock, the vehicle measured as it leaves.
For most operations the realistic sequence is pallets first, vehicle second: pallet records fix billing; vehicle records fix planning. The freight dimensioner page lays out the full range so the sequence can be planned as one programme.