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TRB Policy Study Letter Reports and Other Brief Reports

Letter Reports present the results of periodic or continuing reviews of specific transportation research and technology programs.

Active Committees Sunsetted Committees Sunsetted Committees
 Sunsetted Committees
Long-Term Infrastructure Program
  • Letter Report, January 23, 2018
  • Letter Report, January 30, 2019
Research & Technology Coordination Committee (Federal Highway Administration)
  • Letter Report, November 6, 2018
  • Report: September 6, 2016
  • Letter Report: January 2015
  • Letter Report March 24, 2014
  • Letter Report July 9, 2013
  • Letter Report March 5, 2012
  • Letter Report October 4, 2010
  • Letter Report, September 18, 2007

Transit Research Analysis Committee (TRAC)
  • Letter Report of August 24, 2018
  • Letter Report of June 5, 2017
  • Letter Report of November 11, 2016
  • Letter Report of November 16, 2011
  • Letter Report of October 21, 2010
  • Letter Report of May 26, 2009
  • Letter Report of June 4, 2008
  • Letter Report of May 4, 2007
  • Letter Report of September 27, 2006
  • Letter Report of March 10, 2006
  • Letter Report of June 2, 2005

    Alaska’s Oil and Gas Infrastructure: Risk Assessment Peer Review
    • Letter Report, September 29, 2009
    Assessment of Federal High-Speed Ground Transportation R&D
    • Letter Report of December 23, 1997
    • Letter Report of May 9, 1997
    • Letter Report of December 30, 1996
    • Letter Report of March 27, 1996
    Developing a Regional Concept for Managing Surface Transportation Operations
    • Letter Report of June 30, 2003
    Developing Aviation Environmental Design and Aviation Environmental Portfolio Management Tools (AEDT/APMT)
    • Letter Report of April 20, 2005
    • Letter Report of November 2, 2004
    Estimating Demand for the National Advanced Driving Simulator
    • Summary
    Future of the Federal Highway Administration's (FHWA's) Freight Analysis Framework (FAF)
    • Letter Report of February 9, 2004

    Implementing the Research Results of the Second Strategic Highway Research Program (SHRP 2)

    • Letter Report, January 20, 2015
    • Letter Report, August 18, 2014
    • Letter Report, February 20, 2014
    • Letter Report, August 6, 2013
    • Letter Report, January 23, 2013
    • Letter Report, September 19, 2012
    • Letter Report, March 19, 2012

    Intelligent Construction Systems and Technology: Program Review

    • Letter Report, November 26, 2013
    • Letter Report, May 13, 2013

    Long-Term Bridge Performance Committee

    • Letter Report #7: July 5, 2016
    • Letter Report #6: February 23, 2016
    • Letter Report #5: February 20, 2015 
    • FHWA Response to Letter Report #4
    • Letter Report #4, January 27, 2014
    • FHWA Response to Letter Report #3
    • Letter Report #3, February 19, 2013         
    • Letter Report #2, August 3, 2012
    •  FHWA Response to Letter Report #1
    • Letter Report #1, March 16, 2012

    Long-Term Pavement Performance Committee

    • Long-Term Pavement Performance and Long-Term Bridge Performance Committees Joint Letter Report: March 14, 2017
    • Letter Report #38: May 16, 2016
    • Letter Report #37: February 26, 2016
    • Letter Report #36: August 3, 2015
    • Letter Report #35, December 15, 2014
    • Letter Report #34, August 13, 2014
    • FHWA Response to Letter Report #33
    • Letter Report #33, January 2, 2014
    • FHWA Response to Letter Report #32
    • Letter Report #32, August 8, 2013
    • FHWA Response to Letter Report #31
    • Letter Report #31, February 12, 2013
    • FHWA Response to Letter Report #30
    • Letter Report #30, August 3, 2012
    • FHWA Response to Letter Report #29
    • Letter Report #29, March 5, 2012
    • FHWA Response to Letter Report #28
    • Letter Report #28, August 5, 2011
    • FHWA Response to Letter Report #27
    • Letter Report #27, January 20, 2011
    • FHWA Response to Letter Report #26
    • Letter Report #26, June 21, 2010
    • FHWA Response to Letter Report #25
    • Letter Report #25, December 2, 2009
    • FHWA Response to Letter Report #24
    • Letter Report #24, June 17, 2009
    • FHWA Response to Preserving and Maximizing the Utility of the Pavement Performance Database
    • Preserving and Maximizing the Utility of the Pavement Performance Database
    • FHWA Response to Letter Report #23
    • Letter Report #23, December 23, 2007
    • Letter Report #22, December 18, 2006
    • Letter Report #21, August 22, 2006
    • FHWA Response to Letter Report #20
    • Letter Report #20, February 3, 2006
    • Letter Report #19, August 16, 2005
    • FHWA Response to Letter Report #18
    • Letter Report #18, April 5, 2005
    • FHWA Response to Letter Report #17
    • Letter Report #17, February 20, 2004
    • Letter Report #16, July 29, 2003
    • Letter Report #15, February 24, 2003
    • Letter Report #14, June 25, 2002
    • Fulfilling the Promise of Better Roads: A Report of the LTPP, 2001
    • Letter Report #13, November 13, 2001
    • Letter Report #12, July 31, 2001
    • Letter Report #11, December 19, 2000
    • Letter Report #10, December 4, 2000
    • Letter Report #9, June 24, 2000
    • Letter Report #8, December 7, 1999
    • Letter Report #7, July 13, 1999
    • Letter Report #6, May 6, 1999
    • Letter Report #5, April 1, 1999
    • Letter Report #4, June 29, 1998
    • Letter Report #3, February 19, 1998
    • Letter Report #2, September 8, 1997
    • Letter Report #1, March 25, 1997

      Long-Term Stewardship of Safety Data from the Second Strategic Highway Research Program (SHRP 2)

      • Letter Report, October 14, 2013
      • Letter Report, May 3, 2013

      Pavement Technology Review and Evaluation

      • Letter Report, January 15, 2010
      • Letter Report, March 12, 2009
      • Letter Report, February 4, 2008
      • Letter Report, February 23, 2007
      Polar Icebreaker Cost Assessment Committee

      Research and Technology Coordinating Committee (RTCC)

      • Letter Report, August 2, 2006
      • Letter Report, August 2, 2006 - Strategic Research Develoopment and Technology Plan 2006-2010
      • Letter Report of December 29, 2005
      • Letter Report, June 30, 2005
      • Letter Report of May 2, 2005
      • Letter Report of January 14, 2005
      • Letter Report of August 6, 2004
      • Letter Report of April 9, 2004
      • Letter Report of December 4, 2003
      • Letter Report of September 15, 2003
      • Letter Report of November 30, 2002
      • Letter Report of August 20, 2002
      • Letter Report of December 18, 2001
      • Letter Report of July 12, 1999
      • Letter Report of November 11, 1998
      • Letter Report of April 21, 1999

      Review Implementation of the United States Flag Registry

                                            


      Review of Federal Estimates of the Relationship of Vehicle Weight to Highway Fatality and Injury Risk


      Review of the Federal Transportation Science and Technology Strategy

      • Letter Report of September 3, 1999
      • Letter Report of September 30, 1998

      Review of the Intelligent Vehicle Initiative

      • Letter Report of April 28, 2003
      • Letter Report of July 26, 2001
      • Letter Report of August 14, 2000
      • Letter Report of June 18, 1999

      Review of the National Transportation Science and Technology Strategy

      • Letter Report of January 8, 2001
      • Letter Report of March 28, 2000

        Review of the U.S. Department of Transportation's Intelligent Transportation Systems Standards Program

        • Letter Report of June 24, 2003
        • Letter Report of September 12, 2002
        • Letter Report of January 29, 2002
        • Letter Report of September 12, 2001

        Review of the U.S. Department of Transportation Report on Connected Vehicle Initiative Communications Systems Deployment

        • Letter Report, April 28, 2015 

        Review of the U.S. Department of Transportation Strategic Plan for Research, Development, and Technology

                                                       

        Review of the U.S. Department of Transportation Strategic Plan for Research and Development 

                                                                 

          Review of U.S. Department of Transportation (USDOT) Study and Implementation of Changes to the Section 4(f) Process

          • Letter Report of September 15, 2011
          • Letter Report of April 7, 2009
          • Letter Report of June 9, 2008

          Review of U.S. Department of Transportation Truck Size and Weight Study

          • First Report: Review of Desk Scans, March 31, 2014
          • Second Report: Review of USDOT Technical Reports

          Review of Travel Demand Modeling by the Metropolitan Washington Council of Governments (MWCOG)

          • Letter Report of May 10, 2004 (Appendix)MWCOG Response
          • Letter Report of September 8, 2003MWCOG Response

          Review the Bureau of Transportation Statistics' Survey Programs

          • Letter Report of March 20, 2003 (Commodity Flow Survey)
          • Letter Report of November 5, 2002 (Omnibus Survey Program)
          • Letter Report of June 18, 2002 (National Household Travel Survey)

          Study of a Motor Vehicle Rollover Rating System

          • Letter Report of July 20, 2001

          Review of the Federal Transportation Science and Technology Strategy

          • Letter Report of September 3, 1999
          • Letter Report of September 30, 1998

          Review of the Intelligent Vehicle Initiative

          • Letter Report of April 28, 2003
          • Letter Report of July 26, 2001
          • Letter Report of August 14, 2000
          • Letter Report of June 18, 1999

          Review of the National Transportation Science and Technology Strategy

          • Letter Report of January 8, 2001
          • Letter Report of March 28, 2000

            Review of the U.S. Department of Transportation's Intelligent Transportation Systems Standards Program

            • Letter Report of June 24, 2003
            • Letter Report of September 12, 2002
            • Letter Report of January 29, 2002
            • Letter Report of September 12, 2001

            Review of the U.S. Department of Transportation Report on Connected Vehicle Initiative Communications Systems Deployment

            • Letter Report, April 28, 2015 

            Review of the U.S. Department of Transportation Strategic Plan for Research, Development, and Technology

            • Letter Report of April 30, 2013

            Review of the U.S. Department of Transportation Strategic Plan for Research and Development 

              • Letter Report of August 2, 2006

              Review of U.S. Department of Transportation (USDOT) Study and Implementation of Changes to the Section 4(f) Process

              • Letter Report of September 15, 2011
              • Letter Report of April 7, 2009
              • Letter Report of June 9, 2008

              Review of U.S. Department of Transportation Testing of Electronically Controlled Pneumatic (ECP) Breaks

              • Letter Report of September 29, 2017
              • Letter Report of February 17, 2017
              • Letter Report of October 26, 2016

              Review of U.S. Department of Transportation Truck Size and Weight Study

              • First Report: Review of Desk Scans, March 31, 2014
              • Second Report: Review of USDOT Technical Reports

              Review of Travel Demand Modeling by the Metropolitan Washington Council of Governments (MWCOG)

              • Letter Report of May 10, 2004 (Appendix)MWCOG Response
              • Letter Report of September 8, 2003MWCOG Response

              Review the Bureau of Transportation Statistics' Survey Programs

              • Letter Report of March 20, 2003 (Commodity Flow Survey)
              • Letter Report of November 5, 2002 (Omnibus Survey Program)
              • Letter Report of June 18, 2002 (National Household Travel Survey)

              Study of a Motor Vehicle Rollover Rating System

              • Letter Report of July 20, 2001

               


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