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The rideability of a deflected bridge approach slab (LTRC project 02-2GT continuation : phase II) : [tech summary].

File Language:
English


Details

  • Creators:
    Martinez, Mark ; Morvant, Mark
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Publication/ Report Number:
    SIO No. 30000160 ; LTRC Project No. 11-3P
  • Resource Type:
    Brief
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    DOTD has made attempts to use the standard international roughness index (IRI) to index bridge bumps. However, it was ; discovered that IRI has problems indexing localized roughness. A research eff ort was undertaken to investigate if there might ; be a means to overcome the aforementioned problem. As a result of this eff ort, completed in 2009, DOTD was able to develop ; the Posted-Speed Localized Roughness Index (LRIPS), which attempted to overcome the problems by returning to a response-type road roughness measuring systems (RTRRMS) approach. It was then discovered that the LRIPS could isolate the positions ; of localized roughness phenomena. However, with it being an RTRRMS, it did suff er from “transportability” and “suspension ; degradation” problems, which prevented it from being a tool adequate for measuring distress magnitude. The profi ling ; community had also recognized that the standard IRI has problems coping with localized roughness. Through their eff orts, the ; so-called 25-ft. moving base-length method of evaluating localized roughness (IRI25-ft) was developed. Louisiana’s attempts to ; use the IRI25-ft approach met with some diffi culty, however. While the IRI25-ft methodology ; indexed bumps adequately, DOTD had diffi culty using it to locate the position of bumps on ; the pavement. This research sets details as to how the IRI25-ft method and the LRIPS method ; can be used in a complementary fashion to overcome the limitations of each.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/28359/dot_28359_DS1.pdf
  • File Type:
    Filetype[PDF - 126.44 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:bbacc6b061716fb1a2425fa68f1e10a88938fa672095c8152368f6a3e5d4a114
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