N18 (South Africa)  The N18 is a national route in South Africa which runs from Warrenton through Vryburg and Mahikeng to Ramatlabama on the border with Botswana. The N18 National Route of South Africa is part of the Trans-African Highway Network no. 4 extension (Cairo-Cape Town Highway), which connects Cairo with Cape Town. The N18 begins as a t-junction with the N12 in Warrenton. The road heads west as the town's main road, leaving it to the north-west and crossing the Vaal River before turning northwards. Passing the Ganspan Airport to the west, the N18 enters Jan Kempdorp from the south and meets the R370 and the R708. Leaving the town, it continues northwards, passing Hartswater. Shortly afterwards it crosses into North West Province. It reaches Taung, where the R372 intersects from the west. It continues northwards, passing Pudimoe and after some distance, it enters Vryburg from the south as Moffat Street. Inside the town, it continues north, crossing the east-west N14 Market Street before leaving the town. Continuing north-east for 159km, through Stella (where it meets the R377 at a staggered junction) and Setlagole, it enters Mafikeng from the south-west as the Vryburg Road. Crossing the railway into the town, it becomes the one-way Main Street before reaching a t-junction in the centre of town. Turning north-west as Nelson Mandela Drive from the junction with the R503, it heads through the northern suburbs of Mafikeng and heads northwards for 24km to the Botswana border and the Ramatlabama Border post. On the Botswana Side, it becomes the A1 highway to Lobatse.