traffic cone
noun [ C ] uk/ˈtræf.ɪk ˌkəʊn/ us/ˈtræf.ɪk ˌkoʊn/
（通常因维修而暂时封闭某片道路用的）交通锥，锥形交通路标
a cone-shaped object that is usually red and white or yellow, used to keep vehicles away from an area of road temporarily, usually because repairs are being done to it
One lane of the road was closed off by traffic cones. 这条道路的一个车道用交通锥封闭了。