Practical Guide for Quality Management of Pavement Condition Data Collection
22
adequate equipment can be used to collect the images, but they are to be collected
utilizing a platform traveling at or near the prevailing highway speed.
• AASHTO PP 69, Determining Pavement Deformation Parameters and Cross Slope from
Collected Transverse Profile. Describes a method for deriving pavement deformation
parameters such as rut depth and cross-slope in pavement surfaces using a transverse
profile. Any equipment or procedure with the acceptable accuracy can be used, and the
data will typically be processed using a collection of algorithms in a computer.
• AASHTO PP 70, Collecting the Transverse Pavement Profile. Describes a method for
collecting pavement transverse profile, including its relationship to a level horizontal
reference, in pavement surfaces using automated measurement devices. The profile can
subsequently be used to quantify cross-slope, edge drop off, and pavement distresses such
as rut depth. Any equipment or procedure with the acceptable accuracy can be used;
however, this standard addresses data collection using a measurement device traveling at
or near the posted speed limit.
• AASHTO R 36, Evaluating Faulting of Concrete Pavements. Describes a method for
estimating faulting in the outside wheelpath in jointed concrete pavements using either
manual or automated measurements. Requires reporting of the maximum fault value, to
the nearest mm, and total number of transverse joints and transverse cracks with
measurable faulting over a summary interval of 0.06 m (0.1 km).
• AASHTO R 40, Standard Practice for Measuring Pavement Profile Using a Rod and
Level. Describes a method for collecting pavement profile using conventional survey
equipment. Profiles are measured using relative elevation differences.
• AASHTO R 41, Standard Practice for Measuring Pavement Profile Using a Dipstick®.
Describes a method for collecting pavement prolife using the Face Technologies
Dipstick. Profiles are measured using relative elevation differences.
• AASHTO R 43, Quantifying Roughness of Pavements. Describes a method for
estimating roughness from a single longitudinal profile in each wheelpath. IRI is
calculated from each profile and the average of the two is reported as the roughness for
the section. This standard references ASTM E950, Standard Test Method for Measuring
the Longitudinal Profile of Traveled Surfaces with an Accelerometer Established Inertial
Profiling Reference as the method by which to measure the profile. It requires reporting
in metric units to the nearest 6.3 in/mi (0.1 m/km) over a summary interval of 0.06 mi
(0.1 km). Requires agencies to develop a plan that includes, at a minimum, personnel
qualification and training, equipment accuracy and calibration records, and ongoing QC
program. Additional, non-mandatory guidelines are given for development of a plan,
including agency certification of data collection personnel, equipment maintenance and
testing program, regular testing of verification sections, and time-series comparisons of
IRI data.
• AASHTO R 48, Determining Rut Depth in Pavements. Describes a method for
estimating rut depth in pavement surfaces from transverse profile measurements using a
minimum of five points and the wire method for calculation. Any equipment or
procedure with the acceptable accuracy can be used. It requires reporting of maximum
and average rut depth to the nearest mm and rut depth stratification (2, 3, or 4 level) for
each summary interval of 0.06 mi (0.1 km).