Bridges & Structures

Questions and Answers on the National Bridge Inspection Standards, 23 CFR Part 650, Subpart C

Published March 1, 2023
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Below are frequently asked questions and answers (Q&As) for the National Bridge Inspection Standards (NBIS) regulation, 23 CFR part 650, subpart C. If your question is related to the NBIS and not addressed by one of Q&As below, please send your question to: NBIS_SNBI_Questions@dot.gov. Responses will be provided to the requesters and, as appropriate, posted in the Q&A section of our website. We intend to periodically update these Q&As as new questions arise.

In these Q&As, any reference to the “final rule” or “NBIS” means the regulation as published in the Federal Register on May 06, 2022 (87 FR 27396), unless stated otherwise. Any reference to “prior regulation” is referring to any version of this regulation, prior to this rulemaking, unless stated otherwise.

Except for the statutes and regulations cited, the contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

These Questions & Answers replace Questions and Answers on the National Bridge Inspection Standards 23 CFR 650 Subpart C, last updated on May 21, 2013.

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