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This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-RD-98-085

LTPP Guide to Asphalt Temperature Prediction and Correction

Part 1, PDF Version (833 KB)
Part 2, PDF Version (884 KB)

PDF files can be viewed with the Acrobat® Reader®

The use of Falling Weight Deflectometers (FWDs) to provide input to pavement structural designs and rehabilitations has become common, and is expected to increase with the upcoming release of the 2002 Pavement Design Guide.

Because the deflection response of asphalt layers in a pavement structure to loads is strongly influenced by temperature, methods to calculate representative pavement temperatures and temperature correction factors are critical. This guide presents such methods developed using LTPP data. The formal report by FHWA upon which this guide is based is available here in PDF format (Part 1, Part 2).

Click here to begin using the guide.

In addition, an MS Excel 2000 spreadsheet has been developed that implements all of the methods described in the document as functions (you may have to adjust your security settings in order to run these functions). The source code is also available, and should be easy to implement in other environments. The data sets used to develop these functions can also be downloaded.

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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United States Department of Transportation - Federal Highway Administration