Road Roughness Is Measured Using Which Instrument

Contact between the instrument and the object being measured e g.

Road roughness is measured using which instrument.

Microtexture with wavelengths from 0 mm to 0 5 millimetres 0 020 in macrotexture with wavelengths from 0 5 millimetres 0 020 in to 50 millimetres 2 0 in and megatexture with wavelengths from 50 millimetres 2 0 in to 500 millimetres 20 in. This performance measure has less stochasticity and subjectivity in comparison to other pavement performance. The work to be executed under this specification consists of collecting data using a laser profiler to. The iri was developed in 1986 using the results of the international road roughness experiment performed in brazil in 1982.

Different international standards and surface texture or surface finish specifications recommend the use of different roughness filters. Pavement texture is divided into. Measuring the roughness of a surface involves applying a roughness filter. The international roughness index iri is the roughness index most commonly obtained from measured longitudinal road profiles it is calculated using a quarter car vehicle math model whose response is accumulated to yield a roughness index with units of slope in mi m km etc.

M922 measurement of roughness rutting and texture by laser profilometer. Road surface textures are deviations from a planar and smooth surface affecting the vehicle tyre interaction. A roughness tester shows the measured roughness depth rz as well as the mean roughness value ra in micrometers or microns µm. The main advantages of the iri are that it is stable over time and transferable throughout the world.