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Ride Quality & Construction
Services Since 1990, the Federal Highway
Administration (FWHA) has required the states to report road
roughness on the IRI (International Roughness Index) scale for
inclusion in the Highway Performance Monitoring System
(HPMS). Today, Inertial Profilers are the choice for
the FHWA, State Highway Projects,
Private and State Turnpike/Tollway Authorities,
and Urban Arterial Construction
Projects. Each owner agengy had developed
specifications that incorporate the validation and calibration of
the equipment, to produce the ride indices (IRI, PI, RN) that meet
their smoothness requirements. These new devices offer
greater accuracy and higher production rates of measuring surface
roughness and at the same time record the data in the IRI and PI
mathematical format. AASHTO has already placed the required
certification minimum standards to operate an inertial profiler in
its latest publication.
Ride
Quality Testing Measuring Principle: The longitudinal profile measurement is
based on the "Dakota" method. An accelerometer is used to obtain
vertical vehicle movement, and a laser sensor is used for measuring
displacement between the vehicle body and pavement. Road profile
measurements are then obtained by separating the body movement with
the appropriate body displacements. IRI is calculated in accordance
with World Specifications. The Measured longitudinal profile meets
the Class 1 profile and bias specifications as defined by ASTM
E-950. The Dynatest Road Surface Profiler (RSP) is
carefully designed to provide an advanced, automated, high-quality
pavement roughness and related measurements solution for engineers
nationwide. The RSP is capable of real-time continuous
highway-speed measurements of longitudinal profile (International
Roughness Index (IRI) and Ride Number (RN)), transverse profile,
bumps, profile index (PI) number, rut depth, faulting, macro
texture and geometrics (cross-fall, curvature and gradient).
Measurements can be referenced with linear chainage or GPS,
allowing easy integration to GIS. Advantages of Using
RoadTrac: • Guaranteed high accuracy
according to rigorous standards.
• All indices are computed in
real-time.
• Measurements taken at all traffic
speeds.
• Data collection in urban areas with
"stop and go" feature.
• Easy calibration feature.
• Dynatest worldwide support
network.
• Designed by pavement specialists.
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Services:
RoadTrac's purpose is
to provide a certified testing service to general contractors
working under their State's smoothness requirements. We have
Offices in Texas and Colorado and serve clients all over the United
State's Mid-Region. From Georgia to New Mexico and as far
North as Wyoming RoadTrac's commitment to quality, support
and product integration will continue to play an essential part in
RoadTrac's strategy.
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E-mail us for more information
about
our road-testing services for ride quality and
construction. |
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| 704 E. Ikard, Henrietta, TX 76365 |
3773 Cherry Creek North Drive, Suite 575, Denver, CO 80209
email: dcovert@roadtracinc.com,
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