I am not sure that the suggested translation "This will point us to the road" is completely correct. According to me a better version with slightly different meaning is "This will point us the road". Can someone tell if I'm right or wrong because neither Italian nor English is native to me.
Neither seems likely to be used in English. I am a native English speaker. The only time that I can see this being used is if you and I were lost in the woods and I had a compass, I might say, "This will point us to the road." But, more than likely I would not use a preposition e.g. "this" but the actual object, "compass" The compass/sign will point us to the road.