Legality of Cannabis by U.S. Jurisdiction Secondary route in Namibia C12 roadMajor junctionsSouth end B1 at GrünauMajor intersections C37 near HoloogNorth end B4 at Seeheim LocationCountryNamibia Highway system Transport in Namibia ← C11→ C13 C12 is an untarred highway in southern Namibia. It starts in Seeheim and ends 130 kilometres (81 mi) later in Grünau. In Grünau, the B1 and B3 roads can be accessed. Highways in NamibiaFreeways A1 A2 Trunk routes B1 B2 B3 B4 B6 B8 B10 B11 B14 B15 Secondary routes C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 International routes Trans-Kalahari Corridor Tripoli-Cape Town Highway Walvis Bay-Ndola-Lubumbashi Development Road