I deliberately chose the image of an old stop sign for my essay “Too Obnoxious; Didn’t Read.” Although the yellow-on-black sign was officially replaced by the reflective white-on-red sign in the the U.S. in 1954, I remember seeing some of the old signs in rural areas of Oklahoma as late as the 1970s. Since that time, the yellow yield signs have similarly changed color and design.
It seems that the largest representation of the old color scheme is the standard school bus. Will they change, too? The sight of a huge vehicle in mango or neon red livery would certainly stop traffic.