Cuts the cost of inspection because all the data is provided digitally by a software, and will send out a notice if health of the bridge is declining.
Prevents the costs and repairs that would occur from failure of the structure caused by nature. When a structure collapses, the material needed to demolish and then rebuild the structure is very expensive.
The SHM system allows engineers to monitor the structure and detect small issues before they become big ones. Repair a small issue is a lot less cheaper then waiting for the issue to become major and repairing it then.
There is little to no downtime needed on a structure with SHM.
Because the structure is inspected with a software, you can preplan for an inspector and close down portions of the structure during off hours.
When issues do arise, preventative maintenance can be preplanned because of the monitoring system. The maintenance can be done on off hours to prevent any major closures.
Maintenance and inspections are on a more periodic schedule, compared to a chaotic one that may occur without SHM.
Structures without SHM usually detect critical issues and then fix them, which lowers the total life span.
With SHM, issues are detected early, so they do not become critical issues which may effect the life span of the structure.
SHM allows structure to perform at their optimal function, so you get the most out of the structure for the longest time.