Details:

Creators:
Martinez, Mark ; Morvant, Mark
Martinez, Mark ; Morvant, Mark Less -
Corporate Creators:
Louisiana Transportation Research Center
Subject/TRT Terms:
[+]
Bridge Approaches Indexing Pavement Distress Ride Quality Roughness
Publication/ Report Number:
SIO No. 30000160 ; LTRC Project No. 11-3P
SIO No. 30000160 ; LTRC Project No. 11-3P Less -
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
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:bbacc6b061716fb1a2425fa68f1e10a88938fa672095c8152368f6a3e5d4a114
Download URL:
https://rosap.ntl.bts.gov/view/dot/28359/dot_28359_DS1.pdf
File Type:

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