Road Roughness Is Measured Using Which Instrument

Road roughness measurement techniques and statndardisation of rtrrms devices.

Road roughness is measured using which instrument.

The main advantages of the iri are that it is stable over time and transferable throughout the world. Pavement texture is divided into. A roughness tester shows the measured roughness depth rz as well as the mean roughness value ra in micrometers or microns µm. The iri was developed in 1986 using the results of the international road roughness experiment performed in brazil in 1982.

Road surface textures are deviations from a planar and smooth surface affecting the vehicle tyre interaction. Contact between the instrument and the object being measured e g. 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. Measuring the roughness of a surface involves applying a roughness filter.

Since then the iri has become a well recognized standard for the measurement of road roughness. The work to be executed under this specification consists of collecting data using a laser profiler to. Different international standards and surface texture or surface finish specifications recommend the use of different roughness filters. M922 measurement of roughness rutting and texture by laser profilometer.