What is the overarching safety purpose of NBIS as applied to highway bridges?

• A. To regulate bridge tolls.
• B. To require inspections but not standardized.
• C. To require regular, standardized inspections of all highway bridges to identify structural deficiencies and safety risks.
• D. To rate bridges based on aesthetics.

Answer: (C)

The safety aim is to protect the traveling public by ensuring every highway bridge is checked regularly using uniform methods so problems are found before they become safety risks. NBIS establishes routine, standardized inspections across all bridges, with a defined frequency and a common rating system, so deficiencies are identified consistently and actions like maintenance, repairs, or load restrictions can be taken in a timely manner. This national, standardized approach—rather than nonstandard inspections or focusing on tolls or aesthetics—lets agencies compare data, prioritize work, and keep the bridge inventory safe.