Rutting

Pavement rutting can be defined as a linear surface depression that develops in the wheel-path area. Rutting can be characterized as relatively narrow, or wide, and can be confined to two paths or to multiple paths depending on the nature of the traffic which the roadway is exposed to.

Rutting impacts roadway safety as it can direct vehicles along an unintended path and can also prevent proper drainage and contribute to hydroplaning.

With more than 4,000 measurement points per transverse profile and sub-millimeter vertical accuracy, PavemetricsTM Laser Crack Measurement System (LCMSTM-2) can report rutting with a high level of accuracy and repeatability.

Rut type, width (single or double), depth, cross section area and percentage of deformation can be reported for each road section at user-definable intervals.

As well, rutting depth can be calculated using a wide variety of industry-standard methods including:

  • The ASTM E1703 standard: (Standard Test Method for Measuring Rut-Depth of Pavement Surfaces Using a Straightedge). 
  • The taut wire (string line) method.
  • The Brazilian method.
  • The moving ruler line method.
  • The Five-Point Rut Depth calculation (AASHTO R48-2).

Rutting information is reported in XML format and both depths and measurement locations can be overlaid on a variety of 2D and 3D imaging for reporting.

AASHTO

R87-17; Can determine pavement deformations (Including Provisional Standard PP69)
PP70; Can collect transverse profiles
R48-2; Five-Point Rut Depth calculation

ASTM

E1703; Can compute rutting according to standard
D5340; Can be used for airport condition index surveys
D6433; Can be used for Roads and parking lot pavement condition index survey

FHWA

Distress Indentification Manual for the Long-Term Pavement Performance Program (Rutting)

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