boundary line of road construction

例句：

1. 1.The boundary line between the two countries isclearly marked on the map.
   两国之间的边界线在地图上清晰可见。
2. 2. The demarcation line was drawn to ensure safety duringconstruction.
   为了确保施工安全，划定了分界线。
3. 3. Thedividing line betweenthe old and new areas hasbeen redrawn to improve trafficflow.
   为了改善交通流，重新划定了新旧区域的分界线。