国道3号越南语Quốc lộ 3國路3)是越南河内到中越广西边界的一条公路[1],全长350.44千米,沿途设有88座桥梁。起点是河内市嘉林县的一座橋樑,与国道1号相接。向北经过太原省[2]:383北𣴓省高平省,终点是广西水口口岸(越方是高平省驮隆口岸)。

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