Practices for Ensuring the Smoothness of Concrete Bridge Decks (2022) / Chapter Skim
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3 This chapter describes the background information related to this study, the scope of the study, the study approach, the terminology used in the synthesis, and the organization of the synthesis. Background The ride quality of roads and bridge decks is important to users of the highway system.
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4 Practices for Ensuring the Smoothness of Concrete Bridge Decks The MIRI data that are submitted can include the MIRI of bridge decks, but the segments that contain a bridge must be identified by a separate code. The MIRI data submitted to the HPMS are used to assess the condition of the nation's highways by the FHWA and are summarized in a document called Highway Statistics that shows the quantity of miles associated with various MIRI levels (FHWA 2019)
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Introduction 5 A survey of state DOTs in the United States was performed to gather information on the following topics related to the smoothness of bridge decks when they are constructed: • Equipment used to assess or measure the smoothness. • The metric used to assess the smoothness.
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6 Practices for Ensuring the Smoothness of Concrete Bridge Decks The definitions of the following key terms used in this synthesis are presented in this section and are specific to the context of this synthesis: • Blanking Band: A band having a specified width that is placed on the profile collected by a profilograph when computing the Profile Index (PI)
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Introduction 7 after construction, ride quality indices that are used as a metric to indicate the smoothness of bridges, and past studies that have been performed related to bridge roughness. • Chapter 3 -- State of the Practice.
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