Ключевые слова: abstract, art, blackboard, cartoon, chalk, chalkboard, change, circular, control, creative, crossing, danger, doodle, drawing, electricity, global, go, green, idea, interface, lamp, light, panel, protect, ready, red, regulation, round, safety, semaphore, sign, signal, start, stop, stoplight, street, streetlight, symbolic, traffic, traffic light, vehicles, warning, word, world, yellow,