This document specifies the product model, metrological requirements, technical requirements, layout requirements, installation conditions and maintenance requirements, WIM function and data requirements, test methods, inspection rules, as well as signs, packaging, transportation and storage etc. This document is applicable to the use of single or multiple flat-panel modules installed in the weighing control area, flush with the road surface, to simultaneously or separately support the entire measured axle or axle group to measure the wheel load of a moving road vehicle (if applicable), Axle load, axle group load, vehicle load, and then obtain the automatic weighing device of the total weight of the vehicle.