The layout of geomantic omen should be people-oriented, in line with people's physical and mental health, and at the same time follow the needs of certain spiritual and psychological hints.
I don't know whether you are talking about the road facing the gate or crossing the road. As long as the road is a road, it doesn't matter what material.
First, it doesn't matter if it's across the door, as long as it's not too close and it's a passage (that is, not just a short distance in front of the door).
Second, facing the gate, it is not appropriate to build a prominent road. Scientifically speaking, artificially defining a straight line in front of the door as a route will waste other areas outside the road and form an implied "closed" in front of the door. People come in and out from the same line, and the airflow will let the dirty logistics reach home. From the perspective of geomantic omen, "opening the door with an arrow through the heart" is a kind of "blunt evil spirit". Specifically, "gun-shaped evil spirit" will exert a subtle influence on the director's senses, which deserves attention.
I hope the above words can help you.