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2. Pavement condition index - Wikipedia

   en.wikipedia.org/wiki/Pavement_Condition_Index

   For large pavement systems, the process may involve surveying a random or representative sample of the entire system with the following steps: Divide the total pavement section into sample units (approximately 5000 square feet). Based on the number of sample units in the total section, a certain number of these units are selected to be tested.

3. R-value (soils) - Wikipedia

   en.wikipedia.org/wiki/R-value_(soils)

   The R-Value test [1] measures the response of a compacted sample of soil or aggregate to a vertically applied pressure under specific conditions. This test is used by Caltrans for pavement design, replacing the California bearing ratio test. Many other agencies have adopted the California pavement design method, and specify R-Value testing for ...

4. International roughness index - Wikipedia

   en.wikipedia.org/wiki/International_roughness_index

   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.). [1] [2] Although a universal term, IRI is calculated per wheelpath, but can be expanded to a Mean Roughness Index (MRI) when both wheelpath profiles are collected.

5. Geometric design of roads - Wikipedia

   en.wikipedia.org/wiki/Geometric_design_of_roads

   A typical cross-section drawing of a roadway. The cross section of a roadway can be considered a representation of what one would see if an excavator dug a trench across a roadway, showing the number of lanes, their widths and cross slopes, as well as the presence or absence of shoulders, curbs, sidewalks, drains, ditches, and other roadway ...

6. Road texture - Wikipedia

   en.wikipedia.org/wiki/Road_texture

   Road surface textures are deviations from a planar and smooth surface, affecting the vehicle/tyre interaction. Pavement texture is divided into: 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).

7. Permeable paving - Wikipedia

   en.wikipedia.org/wiki/Permeable_paving

   Permeable paving demonstration Stone paving in Santarém, Portugal. Permeable paving surfaces are made of either a porous material that enables stormwater to flow through it or nonporous blocks spaced so that water can flow between the gaps. Permeable paving can also include a variety of surfacing techniques for roads, parking lots, and ...

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   mail.aol.com

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9. Road surface - Wikipedia

   en.wikipedia.org/wiki/Road_surface

   As pavement systems primarily fail due to fatigue (in a manner similar to metals), the damage done to pavement increases with the fourth power of the axle load of the vehicles traveling on it. According to the AASHO Road Test , heavily loaded trucks can do more than 10,000 times the damage done by a normal passenger car.