With its inherent limitation, the economic regulation of highway transportation can play its role only by combining the social management with the construction of legal system.
公路运输经济管制必需与社会管制和法制建设相结合，才能发挥作用，其本身也存在局限性。
2
It is obvious that water transportation features social nature, flowability and decentralization, linkage, as well as limitation by natural environment.