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PROFILER VERIFICATION
TRC Transportation Engineering Conference
May 15-17, 2018
Tymli Frierson Advanced Research Engineer
System Information and Research Division
OUTLINE
BACKGROUND
INERTIAL PROFILERS
REQUIREMENTS
VERIFICATION REQUESTS
FUTURE SCOPE
ROAD PROFILE A two-dimensional slice of a road’s
surface
Transverse (lateral)
Superelevation
Crown
Rutting and other distresses
Longitudinal
Design grade, roughness
INERTIAL PROFILERS
INERTIAL PROFILER COMPONENTS
Inertial Profiling Systems (IPS) are used to
establish the profile of the roadway surface.
To accomplish this, the equipment uses 3 instruments:
Accelerometer
Laser Height Sensor
Distance Measurement Device
INERTIAL PROFILERS
Sensors record longitudinal and vertical distances,
accelerometer
Calculate smoothness indices
Lightweight or high-speed
LASERS
Single Point Laser
Triple Laser
Line Laser
ARDOT SPECIFICATIONS
The Contractor shall furnish a California-style profilograph complying with ASTM E 1274 or an automated lightweight profilometer complying with ASTM E 950, Class I and calibrated to the California-style profilograph scale.
The Engineer will verify the calibration of the profilograph equipment as frequently as necessary to assure proper operation.
Scheduling and testing will be coordinated with the Engineer.
JOB REQUEST
Resident Engineer contacts Research.
[email protected] and/or [email protected]
Profiler Verification form sent to RE to complete.
Job scheduled upon receipt of completed form.
Profiler Calibrated before job is profiled.
AT THE JOB SITE
Upon arrival, have everything setup.
Pavement swept
Clean of all debris and loose material
Stations marked and easily located
300 ft of pre-section and 300-500 ft of lead-out
Traffic Control
LWP inertial profilers operates at 12 mph
Traffic Signals
Driveways
The person meeting the operator should know the
following:
Section to be profiled
Any station changes
What the RE wants
Calibration
Performed by the profiler operator
BLOCK TEST
BOUNCE TEST
COMPUTER SETUP
DATA COLLECTION
BETWEEN THE WHEELPATH
TEST RESULTS
10% VERIFICATION
JOBS
6 jobs in 2013
13 jobs in 2014
7 jobs in 2016
20 jobs in 2017
4 jobs in 2018
WHAT ABOUT THE CERTIFICATION COURSE?
CERTIFICATION COURSE
PILOT COURSE May 12, 2015
11 participants
Certification only
CERTIFICATION Operator
Equipment
EXAMS Written
60 Questions
Multiple choice, True/False, etc.
70% minimum passing score
Performance 5 Stations
Block Test
Bounce Test
Distance Verification
Measure Profile – Asphalt Section
Measure Profile – Concrete Section
Re-trial allowed for each test
FUTURE SCOPE
Continue doing verification jobs
Certification Course
THANK YOU! [email protected]
