U.S. Department of Transportation
Federal Highway Administration
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Washington, DC 20590

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Bridges & Structures



The geotechnical hazards for transportation applications covered under this technical area include method, procedural and policy guidance for seismic design and retrofit, extreme events, abandoned underground mines, and for evaluating bridges with unknown foundations.


  • National Strategy for Landslide Loss Reduction NEW
    Landslide hazards are present in all 50 States and most U.S. territories, and they affect lives, property, infrastructure, and the environment. Landslides are the downslope movement of earth materials under the force of gravity. They can occur without any obvious trigger. Widespread or severe landslide events are often driven by such hazards as hurricanes, earthquakes, volcanic eruptions, heavy rain events, flooding, and wildfires. Landslides can also cause their own cascading consequences, such as the spread of hazardous materials or the creation of devastating local tsunamis.

    This strategy document, published by the U.S. Geological Survey's Landslide Hazards Program, fulfills the requirements of the National Landslide Preparedness Act (Public Law 116-323) for the publication of a national strategy for landslide hazards, risk reduction, and response. The document was prepared in coordination with a Federal interagency working group that included FHWA. It incorporates input and feedback from a 3-day workshop held virtually on June 22-24, 2021.

    The document presents a vision of how to equitably produce, communicate, and apply landslide data and science to support a broad range of land management, infrastructure, planning, and emergency response decisions.

  • Abandoned Underground Mines Resources
  • Unknown Foundations




Training & Workshops



Updated: 05/12/2023
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000