The N1 begins in central Cape Town at the northern end of Buitengracht Street, outside the entrance to the Victoria & Alfred Waterfront. The first section of the N1 is shared with the beginning of the N2; it is a four-lane elevated freeway that runs along a strip of land between the city centre and the Port of Cape Town. On the eastern edge of the city centre the two roads split, and the N1 turns east as Table Bay Boulevard, passing the Ysterplaat Air Force Base and Century City before the N7 intersects it on its own way out of the city towards Namibia. Major improvements have been made to the Koeberg Interchange, where the N1 meets the M5, one of the main arterial routes linking Milnerton with the Southern Suburbs.