They built the infrastructure in the early 1900, and it eorked fine. They used it until around the time apartheid was ending.
This is a clear case of throwing out the baby with the bathwater.(Edited 6 minutes later.)
Rail gauge should be 2 meters.
@previous (Walt !m2cp3rR5zw)
How much have you actually studied early 20th century South African rail systems?
Their system worked then, it doesn't work now.