Here's an interesting press release describing the Huguenot Toll Tunnel in the Western Cape, on the South African National Roads Agency Limited's website.
By the way, there is a proposal to rename the tunnel after Dullah Omar, the late minister of transport.
My own opinion is that renaming a tunnel is a fairly harmless waste of time - the business impact will probably be negligible, since confusion is unlikely to arise. Of course, renaming towns and streets is a more troublesome, because it makes navigation more difficult.
I'm not a conservative, but if I was, I'd welcome the idea of politicians wasting time on meaningless activities.