crossover block

例句：

1. 1. The construction of the crossover block has been completed.
   交叉过道块的建设已经完成。
2. 2. The traffic lights at the crossover block are very important for safety.
   交叉过道块的交通灯对安全非常重要。
3. 3. The engineers have designed a new crossover block to improve efficiency.
   工程师们设计了一个新的交叉过道块以提高效率。