The following Transportation Research Circulars were released on the web prior to TRB's conversion to a new web-based content managment system. Circulars released after March 2002 are avilable online in a different format.
E-C036 - "Airport Modeling and Simulation for Environmental Analyses," March 2002 (PDF: 4.5 MB / 64 Pages + 13 linked slide presentations)
E-C035 - Airport-Airspace Simulations for Capacity Evaluation, August 2001 (PDF: 235KB + 16 linked slide presentations)
E-C034 - Aviation Gridlock - Phase III: Weather and Weather Technology, July 2001 (PDF: 5.5MB + 8 linked slide presentations)
E-C033 - This is Light Rail Transit, July 2001 (PDF: 1.0 MB / 28 Pages)
E-C032 - Aviation Gridlock - Phase II: Airport Capacity and Infrastructure, May 2001 (PDF: 1.5MB + 7 linked slide presentations)
E-C031 - "Expediting Implementation of Air Traffic Management System Improvements", May 2001 (PDF: 248 KB + 2 linked slide presentations)
E-C030 - "Utility Safety: Mobilized for Action and State, City, and Utility Initiatives in Roadside Safety", April 2001 (PDF: 3MB)
E-C029 - "Aviation Gridlock Understanding the Options and Seeking Solutions", March 2001 (PDF: 1.7MB)
E-C028 - "National Conference on Transportation and Environment for the 21st Century: Proceedings", April 2001 (PDF: 820KB)
E-C027 - "Airports in the 21st Century: Proceedings of a Conference", March 2001 (PDF: 343KB / 70 pages + 3 linked slide presentations)
E-C026 - "Personal Travel: The Long and Short of It," March 2001 (PDF: 4.3 MB / 565 pages in 37 individual files linked from the Table of Contents)
E-C025 - "Safety-Conscious Planning", January 2001 (PDF: 59KB / 14 Pages)
E-C024 - "Driver Education at the Crossroads", January 2001 (PDF: 136KB / 39 Pages)
E-C023 - "Women's Issues in Transportation: Research Problem Statements", December 2000 (PDF: 159KB / 36 Pages)
E-C022 - "Maintenance Research Master Planning Workshop", November 2000 (PDF: 280KB / 76 Pages)
E-C021 - "Evaluation of the Paper Review and Publication Process of the Transportation Research Board", September 2000 (PDF: 111KB / 28 Pages)
E-C020 - "Issues and Methods in the Detection of Alcohol and Other Drugs", September 2000 (PDF: 1.3MB / 156 Pages)
E-C019 - "Urban Street Symposium: Conference Proceedings, December 2000
(PDF: 16MB in 39 individual files linked from the Table of Contents)
E-C018 - "Fourth International Symposium on Highway Capacity," June 2000
(PDF: 7MB in 46 individual files linked from the Table of Contents)
E-C017 - "Automation in Transportation System Construction and Maintenance," April 2000 (PDF: 845 KB / 28 Pages)
E-C016 - "Loaded Wheel Testers in the United States," July 2000 (PDF: 1.5 MB / 21 Pages)
E-C015 - "Statewide Transportation Planning," April 2000 (PDF: 4.4 MB in 8 individual files linked from the Table of Contents)
E-C014 - "Traffic Analysis Software Tools," September 2000 (PDF: 250 KB / 39 Pages)
E-C013 - "Presentations from the 12th Equipment Management Workshop," January 2000 (PDF: 1MB / 146 Pages)
E-C012 - "Use of Artificial Neural Networks in Geomechanical and Pavement Systems," December 1999 (PDF: 66 KB / 21 Pages)
E-C011 - "Statewide Travel Demand Forecasting, Conference Proceedings," September 1999 (PDF: 3.29 MB / 220 Pages in 16 individual files linked from ec011.pdf) Note: Ignore Acrobat complaints about WPTypographic symbol fonts.
E-C010 - "Glossary of Highway Quality Assurance Terms", has been revised and updated as
TR Circular E-C037
E-C009 - "Research Directions for In-Vehicle Computing: Delivering an Integrated Suite of ITS Applications for Driver Assistance and Mobile Services & Information," June 1999 (PDF: 615 KB / 52 Pages)
E-C008 - "Transport Surveys: Raising the Standard - Proceedings of an International Conference on Transport Survey Quality and Innovation," August 2000 (PDF: 4.2 MB in 25 individual files linked from the Table of Contents)
E-C007 - "Fifty Years of TRB Bridge Committees," March 1999 (HTML File)
E-C006 - "Paving Fabric Interlayer as a Pavement Moisture Barrier," Committee on Geosynthetics, March 1999 (HTML File)
E-C005 - "Open-Graded Friction Course: State of the Practice, Committee on Characteristics of Bituminous Aggregate Combinations to Meet Surface Requirements," December 1998 (PDF: 268 KB / 20 Pages)
E-C004 - "Interim Report on Accelerated Pavement Testing (APT) Data Survey" (HTML)
E-C003 -
"International Symposium on Highway Geometric Design Practices", Aug 30 - Sept 1, 1995 (PDF Files)
E-C002 - "Future Directions in Roadside Safety," Proceedings of a Workshop Held, July 27-30, 1997 (HTML File)
E-C001 - "Workshop on a Conceptual Framework for Simultaneous Vehicle and Infrastructure Design (SVID)," December 17-18, 1997 (HTML File)
Printed Circulars
503 - "Perpetual Bituminous Pavements," December 2001 (PDF: 2.8 MB / 117 Pages)
498 - "Presentations from the 8th International Bridge Management Conference," June 2000 (PDF: 53 individual files linked from the Table of Contents)
488 - "Transportation Technology Transfer: A Primer on the State of Practice," May 1998 (PDF: 6.9 MB / 105 Pages in 12 individual files linked from the Table of Contents)
477 - "Assessing the Economic Impact of Transportation Projects," October 1997 (PDF: 160 KB / 34 Pages)
474 - June 1997, "2nd National Symposium on Integrated Transportation Management Systems," May 8-10, 1995 (HTML File)
. There is limited availability of the hard copy of this electronic publication.)