(Sec. 4) Grants the NTSB the authority to investigate major marine casualties occurring in all internal U.S. waters, in addition to the current authority to investigate on U.S. navigable waters or territorial seas. Grants the Secretary of the department in which the Coast Guard is operating the authority to investigate transportation accidents not involving Government misfeasance or nonfeasance.
Appoints a Managing Director to the NTSB.
Directs the NTSB to: (1) develop and approve a process for the NTSB's review and comment or approval of documents submitted to the President, Director of the Office of Management and Budget (OMB), or Congress; and (2) develop and implement a process available to all NTSB members that tracks the status of pending NTSB investigations. Directs the NTSB to maintain at least one fulltime employee in each state located more than 1,000 miles from the nearest NTSB regional office to provide initial investigative response to accidents investigated by the NTSB.
(Sec. 5) Directs Amtrak to submit to the NTSB, the Secretary of Transportation, and the Secretary of Homeland Security a plan to address the needs of families of passengers involved in rail passenger accidents involving an Amtrak intercity train and resulting in a loss of life. Prohibits the NTSB, the Secretary, and Amtrak from releasing personal passenger information except to the passengers' families. Limits Amtrak's liability for damages in actions brought in federal or state court arising out of Amtrak's performance in preparing or providing passenger's lists, or in providing train reservation information, unless such liability was caused by Amtrak's conduct. Makes funds available to carry out this section.
(Sec. 6) Designates the Inspector General of the Department of Transportation (DOT) as the Inspector General of the NTSB (current law, has authority to review only business operations of NTSB). Authorizes appropriations.
(Sec. 7) Requires the NTSB to continue to develop and implement internal audit controls for its operations.
(Sec. 8) Directs the Inspector General of the DOT to investigate the contractors and oversight agencies of the Central Artery tunnel project in Boston, Massachusetts.
(Sec. 9) Directs the Administrator of the Federal Aviation Administration (FAA) to report to Congress on why the FAA has not implemented the aviation recommendations in the NTSB's "Most Wanted Transportation Safety Improvements, 2006".
(Sec. 10) Extends the authorization of appropriations for the NTSB through FY2008, including an emergency fund for necessary NTSB expenses for accident investigations.