Search results
Results From The WOW.Com Content Network
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 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).
Some of the most well-known performance indicators are Pavement Condition Index (PCI), International Roughness Index (IRI) and Present Serviceability Index (PSI), [3] [4] but sometimes a single distress such as rutting or the extent of crack is used.
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]
Many organizations use physical performance indicators to represent levels of service. The graph shows the change in International Roughness Index, a physical performance indicator often used to represent the LOS of road assets. [1] Levels of service (LOS) is a term in asset management referring to the quality of a given service.
These include transversal road profile, macro-texture measurements, longitudinal profile, rut depth, rut width, cross fall, curve radius, cracks, International Roughness Index (IRI), [citation needed] mean profile depth, vehicle speed, position relative to the start point, GNSS position, together with pavement imaging and time-stamping of measurements.
Jacob Kushner and Anthony Langat are Kenya-based reporters for the GroundTruth Project, a non-profit global news service headquartered in the U.S. Sasha Chavkin is a reporter and Michael Hudson is a senior editor at the International Consortium of Investigative Journalists. Produced by Hilary Fung and Shane Shifflett.
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