cone something off
phrasal verb with cone verb UK uk/kəʊn/ us/koʊn/
用锥形路标封闭（道路或区域）
to prevent traffic from using a road or area by putting special objects that are shaped like cones on it
Part of the road had been coned off for repair work. 部分道路用锥形路标封闭起来以便维修。