guidepost

n.路标；路牌；准则

The life does not have the guidepost, all directions decided by you. 人生没有路标，一切方向由你决定。

The driver gets lost in the dense fog in the evening , sees that the roadside has a guidepost indistinctly,he stops down the vehicle dimly. 司机大雾天晚上迷了路，隐隐约约看见路边有一个路标，就把车停下来看。