Research notes : new guidance on managing rockfall.
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Research notes : new guidance on managing rockfall.

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  • English

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    • Alternative Title:
      New guidance on managing rockfall.
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    • Abstract:
      Hundreds of millions of dollars are spent annually in the U.S. to construct and maintain rock slopes and reduce rockfall hazards along highways. Rockfall occurs on slopes where rocks may free fall, bounce, roll or slide. Many factors cause rockfall, including discontinuities in the rock, groundwater conditions, climatic change, poor construction practices, trees and weathering. Legal claims and litigation costs resulting from injuries and deaths due to rockfall reach millions of dollars each year.

      One of the principal ways that transportation agencies manage rockfall hazards is to provide “catchment areas” (ditches) along the side of the road. The design of catchment areas is critical to their success in reducing rockfall hazards. The current practice is not consistent throughout the United States, because only limited research has been conducted to provide designers with the data they need to make informed design decisions.

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