AASHTO Designation: R 48-08 pdf free download

Standard  Practice  for

Determining  Rut  Depth  in Pavements

AASHTO Designation: R 48-08


AASHTO Designation: R 48-08 pdf free download

1.1.This practice  describes a method for estimating rut depth in pavement surfaces from transverse profile measurements.

Five transverse profile points are the minimum number of points required to determine rut depth.

While this practice is based on a five-measurement transverse profile, more than five measurements greatly improves the accuracy and

enhances the likelihood  of identifying

the maximum rut depth given survey vehicle wander and various rut configurations.

Note 1-A    rut is a longitudinal surface depression  in the wheelpath(s) of a pavement surface measured between the width limits of the lane.

1.2.Procedures are defined for measuring a transverse profile and deriving a rut depth,  but detailed specifications  are not included for equipment, instruments,

or software used to make the measurements.

Any equipment and/or procedure, which can measure as specified,  with the accuracy stipulated herein and which can be adequately calibrated,  is acceptable for this method.

1.3.This practice does not purport to address all of the safety concerns,  if any, associated with its use.

It is the responsibility of the user of this protocol to establish appropriate safetyand health

practices and determine  the applicability of regulatory limitations related to and prior to its use.

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