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<h1>Understanding Service Codes for Construction: Highways, Railways, Bridges, and More Under Modified UNCPC Classification.</h1> The classification of general construction services related to civil engineering works under different service codes. It includes services for highways, railways, bridges, tunnels, harbors, dams, pipelines, power plants, mines, industrial plants, and outdoor sports facilities. Each service code specifies the type of construction, such as long-distance pipelines, local pipelines, and communication cables. It also covers repair, renovation, and maintenance services for these constructions. The classification is based on a modified version of the United Nations Central Product Classification (UNCPC).