roadway element failure

例句：

1. 1.The roadway element failure caused the trafficto slow down.
   路基故障导致交通减速。
2. 2. The engineers were investigating the causeof the roadway element failure.
   工程师们正在调查路基故障的原因。
3. 3. The failureof the roadway element could have seriousconsequences for the transportation system.
   路基元素的故障可能会对交通系统产生严重后果。