Standard Practice for Computing International Roughness Index of Roads from Longitudinal Profile MeasurementsTranslate name
STANDARD published on 1.2.2021
Designation standards: ASTM E1926-08(2021)
Publication date standards: 1.2.2021
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: American technical standard
Category: Technical standards ASTM
highway performance monitoring system, HPMS, international roughness index, International Roughness Index, longitudinal profile, pavement management systems, pavement roughness, PMS,, ICS Number Code 93.080.99 (Other standards related to road engineering)
|Significance and Use|
5.1ï¿½This practice provides a means for obtaining a quantitative estimate of a pavement property defined as roughness using longitudinal profile measuring equipment.
5.1.1ï¿½The IRI is portable in that it can be obtained from longitudinal profiles obtained with a variety of instruments.
5.1.2ï¿½The IRI is stable with time because true IRI is based on the concept of a true longitudinal profile, rather than the physical properties of a particular type of instrument.
5.2ï¿½Roughness information is a useful input to the pavement management systems (PMS) maintained by transportation agencies.
5.2.1ï¿½The IRI for the right wheel track is the measurement of road surface roughness specified by the Federal Highway Administration (FHWA) as the input to their Highway Performance Monitoring System (HPMS).
5.2.2ï¿½When profiles are measured simultaneously for both traveled wheel tracks, then the MRI is considered to be a better measure of road surface roughness than the IRI for either wheel track.
Note 1:ï¿½The MRI scale is identical to the IRI scale.
5.3ï¿½IRI can be interpreted as the output of an idealized response-type measuring system (see Test Method and Specification ), where the physical vehicle and instrumentation are replaced with a mathematical model. The units of slope correspond to accumulated suspension motions (for example, metres), divided by the distance traveled (for example, kilometres).
5.4ï¿½IRI is a useful calibration reference for response-type systems that estimate roughness by measuring vehicular response (see Test Method and Specification ).
5.5ï¿½IRI can also be interpreted as average absolute slope of the profile, filtered mathematically to modify the amplitudes associated with different wavelengths 1.1ï¿½This practice covers the mathematical processing of longitudinal profile measurements to produce a road roughness statistic called the International Roughness Index (IRI).
1.2ï¿½The intent is to provide a standard practice for computing and reporting an estimate of road roughness for highway pavements.
1.3ï¿½This practice is based on an algorithm developed in the International Road Roughness Experiment sponsored by a number of institutions including the World Bank and reported in two World Bank Technical Papers 1.4ï¿½The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
1.5ï¿½This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6ï¿½This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
Do you want to be sure about the validity of used regulations?
We offer you a solution so that you could use valid and updated legislative regulations.
Would you like to get more information? Look at this page.
Latest update: 2021-04-19 (Number of items: 2 441 306)
© Copyright 2021 NORMSERVIS s.r.o.