In this regard, the South African government support for the Walvis Bay Spatial Development Initiative (SDI) was initially pledged in early 2000 after consultation between the two Heads of State. At the same time, the Walvis Bay Corridor, forming part of the Trans-Kalahari Highway and stretching from the port of Walvis Bay to the Border Post (Buitepos) with Botswana, was being promoted by the Walvis Bay Corridor Group ' a public private partnership.