USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Revision Log


This document contains the transmittal memos dating to 1996.

The following log summarizes the changes made to the manual since 2005.

An Archive of some older versions of the PDDM is available within FHWA offices.

Date Transmittal Chapter Description
March 2024 2024 2A New Project Management chapter
July 2018 2018 5 New section 5.4.6 and other minor updates
February 2018 1, 12 Minor updates throughout, expanded Section 1.3 on Risk.
December 2014 16 10 Minor updates throughout, added Section 10.3.8 on Non-Destructive Evaluation.
January 2014 15 1, 3, 4, 6, 7, 9, 12 Updated Sections 1.1.4, 1.1.5, 1.2.5, 1.4.1, 4.3, 4.6 to 4.9, 7.1, 7.3 to 7.5 and much of Chapter 9. Formatting changes, typo fixes, link updates, and units rearranged as US Customary [Metric] was accomplished in all chapters.
January 2014* - 2, 3A, 5, 5A, 8, 10, 11, 13 Formatting changes, typos fixed, link updates, and units rearranged as US Customary [Metric]
March 2008 14 All PDDM completely rewritten. Additional chapters for Pavements (Chapter 11) and Right-of-Way (Chapter 12) added.
June 2005 13 All Previous edition of PDDM converted to dual units (Metric and US Customary). Minor corrections made. Hyperlinks added.
*  Minor change. Date not changed in file.
Last updated: Wednesday, May 15, 2024