def add_road_node(self):
        """
        Call me to get a new node name of this block.
        It is more accurate and recommended to use road_node() to get a node name
        """
        self.ROAD_IDX += 1
        return self.road_node(self.PART_IDX, self.ROAD_IDX - 1)

        Call me to get a new node name of this block.
        It is more accurate and recommended to use road_node() to get a node name
        
metadrive/component/pgblock/pg_block.py