indicator/a direction board/sign
Here's your indicator number.
这是您的指示牌号
The sign means that cars cannot enter.
这个指示牌表示汽车不能入内.
Take the escalator over there and turn right.You'll see the sign.
到那边乘坐自动扶梯,然后往右拐,您就会看到指示牌.