cattle grid

noun

1. 拦畜沟栅（铺在公路坑上的金属架，车辆可通过，但牛羊过不去）
   metal bars that are placed over a hole that has been made in the road. Cars can pass over the metal bars but animals such as sheep and cows cannot.

1. 拦畜沟栅(铺在路面上的金属架，防止牲畜通过，人、车可通行)
   A cattle grid is a set of metal bars in the surface of a road which prevents cattle and sheep from walking along the road, but allows people and vehicles to pass.

in AM, use 美国英语用 cattle guard

1. We are installing a cattle grid in the bridge.
   我们正在桥上加装拦牛木栅。
2. Cattle grid please drive slowly
   拦牛木栅车辆慢行

noun

1. a bridge over a ditch consisting of parallel metal bars that allow pedestrians and vehicles to pass, but not cattle

   Synonym:    cattle guard