(57) A road sign is stamped from sheet plastics material, comprising a stem portion (22) and a display area (14), the stem portion (22) being adapted to be inserted diagonally within the aperture of a base member (6). The display portion may be curved, such as by a thermo-forming operation, or may be provided with a slot (20) to enable a similar supplementary display portion to be interfitted with the display portion (14). The display portion may carry a light, which is electrically interconnected with a power source provided in the base.