WIM technology enables troopers to identify overweight vehicles without having to stop and weigh all trucks that pass, thus preventing unnecessary delays in commerce. The WIM is used as a screening device and features sensors embedded in the roadway. Undetectable to the motorist or truck driver, these sensors automatically transmit data on each vehicle passing over them.
Troopers access the data via their laptop computers.
They obtain readings that show what lane a vehicle is in, the number of axles it has and the weight exerted on the roadway by each axle. When a trooper detects a potential violator, he or she notifies another trooper, positioned up the road at a weigh station, to stop the truck.