如上所述，对目标块 中边界节点进行逆向广度优先拓展可以获取各路段到该块

如上所述，对目标块 中边界节点进行逆向广度优先拓展可以获取各路段到该块的正向最优路标志；同理，对目标块边界节点进行正向拓展则可以获取各有向节点对到该块的逆向最优路标志。有向节点对 到目标节点 的最优路标志 及节点对到目标块的 逆向最优路标志位 如式（19）和（20）所示。

結果 (英文) 1:

As mentioned above, the reverse breadth of the target block boundary nodes are expanded sections can be obtained to the best sign that the block is same, to forward the target block boundary nodes each node are expanded you can to reverse-best road mark in the block. -Best road mark to node to the destination node and node to the target block reverse-best road mark (19) and (20) below.

結果 (英文) 2:

As described above, the boundary of the target block to expand breadth-first node can obtain the inverse of the forward section of the optimal path of the block mark; Similarly, the boundary of the target block can be expanded forward nodes have access to the nodes Optimal reverse the path of the block flag. To the node with the optimal path to the target node and the node flag to the target block on the optimal path reverse flag of formula (19) and (20) shown in Fig.

結果 (英文) 3:

As mentioned above, the boundary of target block node reverse breadth first expansion can obtain the optimal way to forward each section of the block logo; similarly, the target block boundary nodes were positive development can obtain the marked nodes on the optimal way to reverse to the block. Directed node to target node optimal road signs and nodes on the optimal way to reverse the target block flag as the formula (19) and (20) are shown.