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LTPP Directives List
This list shows only active directives. For all directives, go here
AWS (Automated Weather Stations) Directives
Distress Directives
FWD (Falling Weight Deflectometer) Directives
GO (General Operations) Directives
IMS (Information Management System) Directives
Materials Directives
Profile Directives
SPS (Specific Pavement Studies) Directives
SMP (Seasonal Monitoring Program) Directives
Traffic Directives
Notes:
- All items are in PDF format. Where possible, they have been converted from the original electronic file. In some cases the original file was not available, and the paper copy was scanned instead. Pagination and other formatting details may be different than the official paper copies, and these files are provided for informational purposes only.
| Directive | Description | Date | Status | Remarks |
| AWS-02 | AWS Data File Format and CR10 Datalogger Clock | 11/18/1994 | Final | |
| AWS-04 | Check-out Procedure and Calibration of AWS Sensors | 10/8/1996 | Final | Requires revisions/updates; they will be completed in the coming months. |
| AWS-12 | AWS Sensor Tracking and Check Form | 2/17/1998 | Final | |
| AWS-16 | Upgrade of AWSScan Software to Version 1.3 | 12/8/1999 | Final | Supersedes AWS-13 |
| AWS-17 | Upgrade of AWSCheck Software to Version 1.5 | 8/6/2001 | Final | Supersedes AWS-15 |
| AWS-19 | Replacement of AWS Parts | 11/10/2004 | Final | Supersedes AWS-18. Requires revisions/updates; they will be completed in the coming months. |
| AWS-21 | Operation and Maintenance of Automated Weather Stations | 2/19/08 | Final | Supersedes AWS-1, AWS-3, AWS-9, and parts of AWS-4 and AWS-19 |
| D-04 | Distress Problem Report (DISTPR) Form | 3/14/1995 | Final | |
| D-11 | Use of Distress Maps from Prior Surveys | 3/11/1997 | Final | |
| D-17 | Digital Conversion of LTPP Distress Maps | 5/2/2000 | Final | |
| D-19 | Cessation of "Night Time" Manual Distress Surveys | 5/10/2000 | Final | |
| D-28 | Distress Measurements on LTPP Test Sections - Use of Measuring Wheels | 7/1/2002 | Final | Superseded by D-36; work completed. |
| D-30 | Guidance for RSC Time Series Review of Distress Data | 10/4/2004 | Final | |
| D-31 | Storage of LTPP Digital Distress Maps, Photographs and Digital Images | 5/17/2004 | Final | Supersedes D-20 |
| D-36 | Distress Identification Manual for the Long-Term Pavement Performance Program | 10/20/2003 | Final | Supersedes D-26 |
| D-37 | LTPP Distress Data Collection for Surface Treatments such as Spray, Slurry Seal, Skin or Other Thin Patches on Cracks | 02/05/2004 | Final | |
| D-38 | Correction to Data Sheet 10 in LTPP Distress Identification Manual | 08/03/2004 | Final | |
| D-39 | Initial Release of Distress Viewer and Analysis (DiVA) Software, Version 1.0 | 08/30/04 | Final | |
| D-40 | Clarification of LTPP Manual Distress Data Collection Procedures | 10/27/04 | Final | |
| D-42 | Safety Considerations during LTPP Manual Distress Data Collection | 1/05/05 | Final | |
| D-44 | Distress Survey Photographs | Final | Supersedes D-41 | |
| D-45 | Clarification of LTPP Manual Distress Data Collection Procedures for Edge, Fatigue and Block Cracking | 11/02/05 | Final | |
| D-48 | Clarification of LTPP Distress Data Collection Procedures for Patching and Lateral Extent of Test Sections for Survey Purposes | 2/25/09 |
Final | |
| D-49 | LTPP Distress Data Quality - Accreditation of Distress Raters | 10/01/09 | Final | Supersedes D-46 |
| D-50 | Reviewing and Correcting PADIAS and PADIAS42 Data | 10/27/09 | Final | Supersedes D-47 |
| FWD-26 | Upgrade of FWDCAL Software to Version 3.0 | 2/20/2001 | Final | |
| FWD-29 | Updated FWD Guidelines and Software | 4/1/05 | Final | Supersedes FWD-20, -22, -23, -24, -25, -27, -28 |
| FWD-30 | LTPP FWD Measurements Manual 4.1 and Calibration Prcoedure Updates | 11/23/10 | Final | Supersedes FWD-29, partially |
| GO-01 | LTPP www Regional Home Page | 10/24/1996 | Final | |
| GO-03 | Policy on Incorporating Computed Quantities in the LTPP IMS | 12/16/1996 | Final | |
| GO-05 | LTPP Letterhead | 2/3/1998 | Final | |
| GO-07 | Maintenance, Checks and Calibration of LTPP Data Collection Equipment | 4/1/1998 | Final | |
| GO-08 | Documentation of Reasons for Test Section Rehabilitation | 4/24/1998 | Final | |
| GO-14 | Rehabilitation Information Form RI-2 - Monitoring Continuation Form | 9/24/1998 | Final | |
| GO-15 | Data Analysis/Operations Feedback Process | 11/9/1998 | Final | Supersedes Analysis-1 |
| GO-22 | Guidelines for Maintenance and Rehabilitation of LTPP Test Sections | 7/30/1999 | Final | Requires revisions/updates; they will be completed in the coming months |
| GO-23 | Guidelines for Signing and Marking of LTPP Test Sections | 7/30/1999 | Final | Requires revisions/updates; they will be completed in the coming months |
| GO-24 | General Specifications for LTPP Digital Cameras | 5/2/2000 | Final | |
| GO-25 | Procedures for Adding Computer Parameters to the LTPP IMS | 5/3/2000 | Final | Page 2 header information requires correction |
| GO-34 | Measurement and Update of Location Coordinates | 03/16/2005 | Final | Supersedes S-10. Requires revisions/updates; they will be completed in the coming months |
| GO-38 | LTPP Pavement Performance Monitoring Adjustments | 3/17/06 | Final | Supersedes GO-21 and D-27 |
| GO-44 | AIMS Electronic Data Format, Submission Standards, and Dates | 9/29/09 | Final | Supersedes GO-43 |
| I-08 | Procedures for Updating Laboratory Identification Codes | 6/8/1993 | Final | |
| I-37 | Processing of Global Positioning Measurements | 12/20/1995 | Final | Requires revisions/updates; they will be completed in the coming months |
| I-48 | Automated Entry of LTPP P46 (Resilient Modulus of Unbound Base, Subbase and Subgrade) Materials Testing Data from the FHWA LTPP Laboratory Testing Contractors | 8/21/1997 | Final | |
| I-51 | Disposition of Superseded Software and IMS Tables | 5/18/1999 | Final | Requires revisions/updates; they will be completed in the coming months |
| I-53 | EXPERIMENT SECTION Definitions | 6/9/1998 | Final | |
| I-56 | LTPP IMS Standards and Conventions | 8/4/1998 | Final | |
| I-58 | Disposition of Obsolete or Rejected LTPP IMS Data and Archiving | 5/13/1999 | Final | Requires revisions/updates; they will be completed in the coming months |
| I-60 | Revision to LTPP IMS Standards and Conventions | 8/28/1998 | Final | |
| I-66 | LTPP Computed Parameters | 3/30/1999 | Final | Supersedes portions of I-60 |
| I-84 | EXPERIMENT_SECTION Change Requests | 11/13/2001 | Final | Supersedes I-54 |
| I-85 | Guidelines for Manual Upgrades to LTPP IMS Quality Control Checks | 3/19/2003 | Final | |
| I-102 | LTPP Data Release Policy | 11/19/2002 | Final | Supersedes GOD-2, GO-11, GO-12, I-25, I-25-A.1 |
| I-123 | Pavement Performance Database Software Performance Reports | 6/10/05 | Final | |
| I-134 | Guidelines for Comments in COMMENTS_GENERAL Table | 6/25/07 | Final | |
| I-138 | Deletion of Data for Rejected Section 32_B420 from LTPP Database | 2/19/08 | Final | |
| I-142 | Deletion of Data for Rejected Section 90_1802 from the LTPP Database | 12/09/08 | Final | |
| I-144 | Deletion of data for rejected sections 13_0501 and 13_0567 from LTPP Database | 05/19/09 | Final | |
| I-146 | IMS Software Release Version 2010.01 | 01/22/10 | Final | Supersedes I-145 |
| I-147 | Data Upload, Release Schedule and Procedures - 2010-2014 | 03/19/10 | Final | Supersedes I-128 |
| M-20 | Coring of Overlaid LTPP Test Sections | 3/15/1999 | Final | |
| M-27 | Materials Operations Problem Report (MOPR) Form | 11/2/06 | Final | |
| M-28 | Long-Term Pavement Performance Program Laboratory Materials Testing and Handling Guide | 11/8/06 | Final | Supersedes I-12, M-04, M-07, M-08, M-09, M-11, M-13, M-14, M-17, M-21, M-22, M-23 |
| P-32 | Implementation of International Cybernetics Corporation Inertial Profilers | 10/9/2002 | Final | Supersedes P-13, P-17 and P-24 |
| P-40 | Wim Smoothness Index Software to Evaluate SPS Traffic Data Collection Pooled Fund Project Sites | 05/09/2005 | Final | |
| P-41 | Upgrade of PROQUAL Software to PROQUAL 2005 Version 5.0 Release 2 Build 2 | 05/09/2005 | Final | Supersedes P-36 |
| P-42 | Initial Release of Profile Export (ProXport) Software Version 1.1 | 05/09/2005 | Final | |
| P-44 | LTPP Manual for Profile Measurements and Processing, April 2008 | 12/18/2008 | Final | Supersedes P-37, P-38 and P-43 |
| TDP-18 | LTPP Traffic Data Collection Guide | 4/18/2000 | Final | Supersedes TDP-10, -11 and -12 |
| TDP-19 | Implementation of Traffic Sheet Entry in the IMS | 03-Mar-01 | Final | |
| TDP-23 | Upgrade of Traffic Sheets 3 and 10 | 3/19/2001 | Final | |
| TDP-40 | Traffic Data Processing Software Performance Reports | 6/10/05 | Final | |
| TDP-43 | Downloading Traffic Data from the Phase II Weigh-In-Motion Installations | 3/20/07 | Final | |
| TDP-51 | Release of LTPP Traffic Analysis Software Version 1.7.3 | 11/18/09 | Final | Supersedes TDP-50 |