BS EN 13036-5:2019
$198.66
Road and airfield surface characteristics. Test methods – Determination of longitudinal unevenness indices
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 56 |
This document specifies the mathematical processing of digitized longitudinal profile measurements to produce evenness indices. The document describes the calculation procedure for the International Roughness Index (IRI), Root Mean Square (RMS) and Longitudinal Profile Variance (LPV) from three separate wavelength bands and the ?WLP and ?WLP from the Weighted Longitudinal Profile (WLP). The purpose of this document is to provide a standard practice for calculating and reporting estimates of road evenness from digitized longitudinal profiles. Other aims with this document are to facilitate the comparison of evenness measurement results carried out with different profiling instruments in European countries. The evenness range covered in this document is defined as the wavelength range 0,5 m to 50 m. It is noted that both shorter and longer wavelengths can also influence the driving comfort but those are not covered in this document. The quantified evenness indices derived from this document are useful support for pavement management systems. The output can also be used for type approval and performance control of new and old pavements. The indices can be used on rigid, flexible and gravel road surfaces. This document doesn’t define from what position on the road the longitudinal profile should be obtained. The derived indices are portable in the sense that they can be obtained from longitudinal profiles measured with a variety of instruments.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Symbols and abbreviations 5 Calculation of evenness indices |
| 12 | 6 International Roughness Index (IRI) 6.1 General |
| 13 | 6.2 Representation of the obtained results 7 Wave band analysis 7.1 General |
| 14 | 7.2 Wave band indices 8 Weighted Longitudinal Profile (WLP) analysis 8.1 General 8.2 Prerequisites |
| 15 | 9 Reporting |
| 16 | Annex A (normative)Calculation of the IRI A.1 The IRI calculation A.2 Moving Average Filter A.3 The quarter-car simulation parameters defining IRI |
| 17 | A.4 Solving the differential equation |
| 20 | Annex B (informative)Example code for IRI calculation |
| 22 | Annex C (informative)Wave band analysis using bi-octave bands and RMS C.1 General C.2 Resampling and filtering C.3 Three bands filtering to the profile C.3.1 The short wave band, Psw |
| 23 | C.3.2 The medium wave band, Pmw C.3.3 The long wave band, Plw C.3.4 Calculation of indices and reporting length C.4 Filter parameter specifications C.4.1 Octave filters (according to ANSI-S1-11-2004-07-27 and ISO 8608) |
| 24 | C.4.2 Bi-octave band |
| 25 | C.5 Filter coefficients |
| 27 | C.6 Wave band filter response curves |
| 28 | C.7 Root Mean Square value of the pre-processed profile elevations per wave band C.8 C++ code for calculation of energy profiles filtered by wave band |
| 44 | Annex D (informative)Wave band analysis using LPV over selected wavelengths D.1 Overview of Longitudinal Profile Variance (LPV) calculation D.2 Pre-processing D.3 Filtering D.4 Calculation of filter coefficients |
| 45 | D.5 Calculation of the width of the filter D.6 Calculation of high-pass coefficients |
| 46 | D.7 Application of the coefficients to filter the profile data D.8 Enhanced variance |
| 47 | Annex E (informative)Calculation of the WLP E.1 The WLP calculation E.1.1 Pre-processing E.1.2 Fourier transformation E.1.3 Limiting the wavelength range |
| 48 | E.1.4 Weighting of the Fourier Transform E.1.5 Octave-band filtering |
| 49 | E.1.6 Inverse Fourier Transform E.1.7 Calculating the WLP |
| 50 | E.1.8 Characterizing the WLP E.1.9 Example code for WLP calculation |
| 54 | Annex F (informative)Indicator implementation check |
