Code of Federal Regulations Title 49. Transportation § 49.831.30 Authority of NTSB in highway investigations

(a) Scope. The NTSB is responsible for the investigation of selected highway accidents (e.g., collisions, crashes and explosions), including at railroad grade-crossing accidents. Such investigations will be conducted in cooperation with the designated authorities of the state or local jurisdiction in which the accident occurred.

(b) Authority to examine or test. Pursuant to § 831.9 of this part, a credentialed employee of the NTSB is authorized to examine or test any item, including any vehicle, part of a vehicle, equipment, or contents of any vehicle or equipment involved in an accident subject to the NTSB's authority. Examination or testing will be conducted—

(c) Any Federal, state, or local agency that conducts an investigation of the same highway accident the NTSB is investigating shall provide the results of its investigation to the NTSB.