For what reason? So that vehicles on the road would not be crossing railroad tracks at the wrong moment and be struck by a speeding train.
(‏ ب )‏ أَيُّ إِرْشَادٍ مُنْقِذٍ لِلْحَيَاةِ يَحْصُلُ عَلَيْهِ شَعْبُ ٱللهِ ؟‏