The Gangbyeon Expressway (Korean: 강변북로) is an eight-lane highway located in Seoul, South Korea. It is part of National Route 46 and National Route 77. This route connects Seoul to Namyangju, with a total length of 37.37 km (23.22 mi). The highway is directly connected with the Jayu Motorway (자유로) in the border city located on the Gayang Bridge. The Mapo Bridge–Namyangju section has been designated as National Route 46, while the Yanghwa Bridge–Goyang section is specified as National Route 77. The highway is the main arterial road that connects northern Seoul with satellite cities such as Goyang, Paju, and Namyangju.