Longer Combination Vehicles:
Potential Infrastructure Impacts, Productivity Benefits, and Safety Concerns
T-RCED-94-306: Published: Sep 14, 1994. Publicly Released: Sep 14, 1994.
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GAO discussed the safety and economic impacts of longer combination vehicles (LCV) operations. GAO noted that: (1) expanded LCV use would increase infrastructure maintenance costs by up to $20.2 billion and would have the greatest impact on bridges, interchanges, and staging areas; (2) infrastructure maintenance costs could be limited by selecting LCV routes away from major population centers, but benefits would also be reduced; (3) nationwide LCV use could reduce transportation costs by about 3 percent and would benefit most large companies that consolidate shipments; (4) LCV are less stable than single-trailer trucks which makes them a greater safety risk on congested highways; (5) states have limited data and inspection programs to monitor LCV operations and may not recognize emerging problems; and (6) the Federal Highway Administration should include LCV driver qualifications in its motor carrier safety regulations.
Oct 3, 2018
Positive Train Control:
Most Passenger Railroads Expect to Request an Extension and Substantial Work Remains Beyond 2018GAO-19-135T: Published: Oct 3, 2018. Publicly Released: Oct 3, 2018.
Sep 13, 2018
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Positive Train Control:
Most Railroads Expect to Request an Extension, and Substantial Work Remains Beyond 2018GAO-18-692T: Published: Sep 13, 2018. Publicly Released: Sep 13, 2018.
Sep 5, 2018
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Great Lakes-St. Lawrence Seaway:
Assessing Risks and Measuring Performance Could Improve Maritime TransportationGAO-18-610: Published: Sep 5, 2018. Publicly Released: Sep 5, 2018.
Jul 30, 2018
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Public Transit Partnerships:
Additional Information Needed to Clarify Data Reporting and Share Best PracticesGAO-18-539: Published: Jul 30, 2018. Publicly Released: Jul 30, 2018.
Jul 26, 2018
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Aviation Security:
Basic Training Program for Transportation Security Officers Would Benefit from Performance Goals and MeasuresGAO-18-552: Published: Jul 26, 2018. Publicly Released: Jul 26, 2018.
Jul 19, 2018
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Highway and Transit Projects:
Better Data Needed to Assess Changes in the Duration of Environmental ReviewsGAO-18-536: Published: Jul 19, 2018. Publicly Released: Jul 19, 2018.
Jul 12, 2018
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Aviation Security:
Actions Needed to Better Identify and Track U.S.-Bound Public Charter Operations from CubaGAO-18-526: Published: Jul 12, 2018. Publicly Released: Jul 12, 2018.
May 31, 2018
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Capital Investment Grants Program:
FTA Should Address Several Statutory ProvisionsGAO-18-462: Published: May 31, 2018. Publicly Released: May 31, 2018.
May 29, 2018
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Interstate Pipeline Inspections:
Additional Planning Could Help DOT Determine Appropriate Level of State ParticipationGAO-18-461: Published: May 29, 2018. Publicly Released: May 29, 2018.
May 24, 2018
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Small Unmanned Aircraft Systems:
FAA Should Improve Its Management of Safety RisksGAO-18-110: Published: May 24, 2018. Publicly Released: May 24, 2018.
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