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The roughness scale that was defined and tested was eventually named the International Roughness Index. [8] The IRI is used in managing pavement assets, as well as sometimes in evaluating new construction to determine bonus/penalty payments for contractors or for identifying specific locations where repairs or improvements (e.g., grinding or ...
The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]
Pavement performance models could be developed to predict a single distress such as a crack or the aggregate pavement condition index. Schematic deterioration of the condition of a road over time The increase in the IRI of a road in Texas. The blue dots on the curve represent maintenance actions.
The present serviceability index (PSI) is a pavement performance measure.Introduced by the American Association of State Highway and Transportation Officials (AASHTO), the PSI is one of the most widely used pavement performance indicators after pavement condition index (PCI) and international roughness index (IRI).
Nesting index: index corresponding to the cut-off wavelength of a linear filter, or to the scale of the structuring element of a morphological filter. Under 25178, industry-specific taxonomies such as roughness vs waviness are replaced by the more general concept of "scale limited surface" and "cut-off" by "nesting index".
Roughness length, roughness as applied in meteorology; International Roughness Index, the roughness of a road; Hydraulic roughness, the roughness of land and waterway features; Roughness (psychophysics) in psychoacoustics refers to the level of dissonance; The 'roughness' of a line or surface, measured numerically by the Hausdorff dimension
This article has been rated as Low-importance on the project's importance scale. This article would benefit from a picture of a quarter car suspension system. 188.121.68.1 ( talk ) 08:27, 8 March 2010 (UTC) [ reply ]
In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor f D, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.