Cape Town, like most South African cities, uses Metropolitan or "M" routes for important intra-city routes, a layer below National (N) roads and Regional (R) routes. Each city's M roads are independently numbered. Most are at-grade roads. However, the M3 splits from the N2 and runs to the south along the eastern slopes of Table Mountain, connecting the City Bowl with Muizenberg. Except for a section between Rondebosch and Newlands that has at-grade intersections, this route is a highway. The M5 splits from the N1 further east than the M3, and links the Cape Flats to the CBD. It is a highway as far as the interchange with the M68 at Ottery, before continuing as an at-grade road.