Infrasense Provides Pavement Structure Evaluation for 29 Miles of US Highway 26 in Idaho

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Infrasense has recently performed pavement subsurface evaluations on US highway 26 in Idaho using ground penetrating radar (GPR). The GPR survey results will be integrated into a GIS database and be combined with other data as part of a larger study to determine the remaining life of the pavement.

The Infrasense high-speed GPR vehicle survey took place along US highway 26

Infrasense has recently completed a GPR pavement structure survey of 29 miles of US highway 26 in Idaho. The project is part of a larger subsurface study that has included Falling Weight Deflectometer (FWD) testing and pavement coring at regular intervals along the highway to determine the remaining life of the pavement. The GPR results will be integrated into a GIS database and combined with the other data to more efficiently determine appropriate rehabilitation strategies.

Infrasense has played a key role in the development and implementation of GPR for pavement assessments over the past 26 years. Currently, the most common application of this state-of-the-art technology is the determination of pavement layer thickness because, unlike traditional coring, GPR requires no lane closures and provides a timely and cost-effective means of collecting continuous thickness data. This data may be used for network-level pavement management, project-level rehabilitation design, or quality assurance of newly constructed pavements. Infrasense surveys have covered over 10,000 lane miles of pavement. Projects range in size from less than 100 miles along the Pennsylvania Turnpike to a survey of 3,500 miles for the Oklahoma Department of Transportation.

At the network level, GPR can provide layer structure data used to identify homogeneous sections and to compute the remaining life of segments of the network. Computation of remaining life enables highway agencies to optimize their programming and planning of pavement rehabilitation. A number of agencies have implemented GPR at the network level, including the California Department of Transportation (CalTrans) and the Oklahoma DOT. Infrasense recently completed a network-level pavement structure investigation to supplement FWD testing of over 1500 miles of county roads throughout North Dakota.

Many GPR pavement thickness studies focus on supporting FWD operations. Pavement strength evaluations using a Falling Weight Deflectometer (FWD) provide useful data to pavement engineers for estimating remaining life and planning rehabilitation. Accurate pavement layer thickness data enhances FWD pavement strength evaluations, since thickness data is required for calculation of the pavement moduli. Thus, the availability of GPR data can provide a better estimate of the remaining life of a particular pavement and can enable more accurate planning decisions.

About Infrasense, Inc.
Since 1987, Infrasense, Inc. has applied state-of-the-art technologies to address the most difficult challenges in subsurface scanning. Infrasense’s engineers are able to nondestructively extract critical information from a diverse range of structures. In addition to providing ongoing subsurface evaluation services to clients across the country, the firm has also conducted numerous research programs to advance the field of subsurface detection and non-destructive evaluation.

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Sarah Kelly
Infrasense, Inc.
+1 (781) 648-0440
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Infrasense, Inc.

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