Where the extent of the road works and the volume of traffic justify it, the limits of the works shall be marked by setting up continuous or discontinuous barriers painted with alternate red and white, red and yellow, black and white, or black and yellow stripes, and in addition, at night, if the barriers are not reflectorized, by lights and reflecting devices. Reflecting devices and fixed lights used for this purpose shall be red or dark yellow and flashing lights shall be dark yellow.
