In-road sensors can measure a vehicle’s weight
Researchers in Norway are developing a system that can check and weigh HGVs whilst they are in motion.
The aim of the project is to make commercial road haulage more efficient by ensuring that only incorrectly loaded vehicles are stopped for inspection.
The technology used involves a Weigh-in-Motion sensor system which measures the weight of the vehicle using a special cable countersunk into the road surface.
The sensor in the cable utilises piezo technology. The cable generates an electrical voltage when subjected to pressure, and in this way can record the weight of a vehicle passing over it.
The recorded information is then sent to a computer, before automatic number plate recognition technology is used to assess whether a vehicle has exceeded its permitted load.
