Here is a Newly updated map on how to get to King Shaka International Airport. It shows Directions to King shaka international from both the N2 and R102. There is no access to the airport from the M4 via La Mercy. The old road only leads to the local chicken farm, now

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GPS coordinates for the terminal building are:
29.36'52"S 31.06'59"E / 29.61444S 31.11639E