Road Condition Analysis
Computes the IRI for a continuously increasing segment given a road pr...
Computes the IRI for fixed length segments (e.g. 100m segments) given ...
Computes the IRI for fixed length overlapping segments (e.g. 100 m seg...
precomputed coeficients 100 mm segments (lazily evaluated promise)
precomputed coeficients 250 mm segments (lazily evaluated promise)
Computation of the International Roughness Index (IRI) given a longitudinal road profile. The IRI can be calculated for a single road segment or for a sequence of segments with a fixed length (e. g. 100m). For the latter, an overlap of the segments can be selected. The IRI and likewise the algorithms for its determination are defined in Sayers, Michael W; Gillespie, Thomas D; Queiroz, Cesar A.V. 1986. The International Road Roughness Experiment (IRRE) : establishing correlation and a calibration standard for measurements. World Bank technical paper; no. WTP 45. Washington, DC : The World Bank. (ISBN 0-8213-0589-1) available from <http://documents.worldbank.org/curated/en/326081468740204115>.