In South Africa, a red-bordered circular sign with a black truck symbol prohibits trucks.
The sign is a restriction sign: it tells drivers of goods vehicles or trucks that they may not proceed beyond the sign, subject to the precise vehicle classifications and exceptions in the applicable road rules. The red border signals prohibition.
South African road signs draw on the broader southern African and international sign tradition, using recognizable shapes and symbols to reduce dependence on written language. A truck prohibition is different from a weight-limit sign, which uses a numerical mass value and restricts vehicles according to weight rather than vehicle type.