郊区公路由于照明条件限制,晚上能见度较差,在弯道、叉路、桥头等危险路段很容易出交通事故。为此,有不少先进国家,已采用公路定向反光标志。公路定向反光标志能在汽车灯光照射下,在数百米前就能反出明亮的标志及符号,从而大大提高了行车 Suburban roads due to lighting conditions, poor visibility at night, in the corners, fork roads, bridgeheads and other dangerous sections is easy to be a traffic accident. To this end, many advanced countries have adopted road-oriented reflective signs. Highway directional reflective signs can be illuminated in the car, hundreds of meters away before the bright signs and symbols can be reversed, which greatly improved driving