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Publication Number: FHWA-HRT-06-132
Date: December 2006

Long-Term Pavement Performance Program Manual for Falling Weight Deflectometer Measurements

Chapter 14. Version History

14.1 VERSION 1.0

The initial version of this manual , the SHRP-LTPP Manual for FWD Testing and Operational Field Guidelines, was released January 1989 (SHRP reference "SHRP-LTPP-OG-002"). This guide included instructions for testing with edition 10 of the Dynatest FWD data collection software only. This guide included only three test plans: flexible, JCP, and CRCP sections, and it was applicable to only GPS testing.


The Pavement Maintenance Effectiveness Program of SHRP published modifications to version 1.0 of the FWD guide for testing at SPS 3 and SPS 4 test sections. The following modifications were published in SHRP report SHRP-H-358 dated November 1993 (pages 134–137); however, the modifications were in effect before that date:

14.3 VERSION 2.0

Major update released May 7, 1993.

14.4 VERSION 3.0

Major update released January 21, 2000.

14.5 VERSION 3.1

Minor update released October 31, 2000.

14.6 VERSION 4.0

Major update released April 1, 2005. This is the first complete rewrite of the LTPP Manual for Falling Weight Deflectometer Measurements since version 1.0.

14.7 VERSION 4.1

Minor update released July 1, 2006.

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