This item is one-step mouled,chill-proof,anti-sunburn,anti-impact and not easy to age;When filled with water,the road barrier will be more flexible,if without water,it is wasy to move;The color of the road barrier is brightly orange.At night,its reflective part is more comspicuous.This product is suitable for entries of expressways,turnings of the roads and the tollgates,reminding the drivers to slow down.