Main construction contents
Bridge
tunnel
Earth structure
Large-scale update
Expressway By reconstructing the main body structure with the latest technology, we will ensure the same or better performance than the current new structure, and maintain and enhance the performance.
Large-scale repair
Expressway By repairing and reinforcing the main body structure with the latest technology, performance and functions equivalent to or better than those at the beginning of construction will be restored and the service life will be extended.