HCM6 Vol. 4 Errata Website

HCM 2010 Vol. 4 Errata Website

2003 Access Management Manual Errata Website

NCHRP Research Report 926: Guidance to Improve Pedestrian and Bicyclist Safety at Intersections
Tables 15 through 24 have been updated to match the summary Table 25 in the online version of the report.

NCHRP Web-Only Document 326: Design Guidelines for Test Level 3 through Test Level 5 Roadside Barrier Systems Placed on Mechanically Stabilized Earth Retaining Walls
Table 9-4, p. 251, contained incorrect information in the Second Layer column. The table has been corrected in the web-only document.

NCHRP Synthesis 561: Use of Vehicle Probe and Cellular GPS Data by State Departments of Transportation
In March 2021, the layout of text and figures was altered on Pages 52 through 57 of the online version of the synthesis report. Content remained the same as in the print version.

ACRP Research Report 231: Evaluating the Traveler's Perspective to Improve the Airport Customer Experience
In the Author Acknowledgments, in the second paragraph, the name "Charles Kaduoka" has been changed to "Carlos Kaduoka." In the table listing the peer review committee for ACRP Project 01-40, Jim Peterson’s title, "Director, Customer Experience/Brand Strategy," has been changed to "Senior Manager, Customer Service." These changes have been made in the online version of the report.

ACRP Report 51: Risk Assessment Method to Support Modification of Airfield Separation Standards
In Table 7 on page 25, the LDVO coefficient was changed from -3.088 to -13.088. The online version of the report has been corrected.

NCHRP Research Report 927: Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios
In March of 2021, an errata for this publication was issued. An unrevised version of Appendix I was submitted and published. The provided document is Appendix I as revised per direction to the authors. The document replaces that in the published version.

ACRP Research Report 215: Transportation Network Companies (TNCs): Impacts to Airport Revenues and Operations—Reference Guide
Errata for ACRP Research Report 215 have been issued.

TCRP Synthesis 134: Customer-Focused Service Guarantees and Transparency Practices
Page i of the synthesis omits some of the authors. The correct author list is as follows:

Michael J. Walk
James P. Cardenas
Kristi Miller
Paige Ericson-Graber
Chris Simek

Texas A&M Transportation Institute
Austin, TX

NCHRP Web-Only Document 235: Quantifying the Influence of Geosynthetics on Pavement Performance
Errata for NCHRP Web-Only Document 235 have been issued.

NCHRP Report 797: Guidebook on Pedestrian and Bicycle Volume Data Collection
NCHRP Web-Only Document 205: Methods and Technologies for Pedestrian and Bicycle Volume Data Collection
An errata for NCHRP Report 797 and NCHRP Web-Only Document 205 has been issued.

ACRP Synthesis 54: Electric Vehicle Charging Stations at Airport Parking Facilities
On pages 9 and 10, Figures 3 and 4 were reversed. The online version of the report has been corrected.

Soil Stabilization with Sodium Chloride
The paper, Soil Stabilization with Sodium Chloride, published in Transportation Research Record: Journal of the Transportation Research Board, No. 1673 (pp. 46–54, DOI 10.3141/1673-07) in 1999, has been retracted due to unacknowledged overlap with work previously published by Dr. El-Metwally El-Sekelly in his 1987 thesis titled: “Characterization of Sodium Chloride Stabilized Soils and Soil-Aggregate Mixtures for Low-Volume Roads in Egypt.”

SHRP 2 Report S2-S01C-RW-1: A Multivariate Analysis of Crash and Naturalistic Driving Data in Relation to Highway Factors
The foreword originally contained incorrect information about the project. The text has been corrected in the online version of the report.

NCHRP Report 703: Guide for Pavement-Type Selection
On page 67, in the second bullet point at the bottom of the page, the second to last sentence should read, “To maximize the economic value, the agency should consider alternatives that stimulate competition and incorporate innovative approaches.” The wording has been corrected in the online version of the report.

SHRP 2 Report S2-L03-RR-1: Analytical Procedures for Determining the Impacts of Reliability Mitigation Strategies
On page 80, the reference to Table 2.9 should be to Table 2.5. On page 214, the reference to Table B.30 should be to Table B.38. These references have been corrected in the online version of the report.

SHRP 2 Report S2-C03-RR-1: Interactions Between Transportation Capacity, Economic Systems, and Land Use
Figure 4.3 (p. 23) was cut off along the right edge and did not display all of the information in the bar graph. The figure has been corrected in the online version of the report.

NCHRP Report 716: Travel Demand Forecasting: Parameters and Techniques
Table C.4 on page C-12 contained incorrect information. The corrected table is available here.

NCFRP Report 17: Multimodal Freight Transportation Within the Great Lakes–Saint Lawrence Basin
The list of authors on the title page has been updated in the online version to include two authors' names that were inadvertently omitted from the print version of the report.

ACRP Report 71: Guidance for Quantifying the Contribution of Airport Emissions to Local Air Quality
The list of authors from Wyle Laboratories Inc. on the title page has been corrected in the online version.

NCHRP Synthesis 434: Use of the U.S. Census Bureau’s Public Use Microdata Sample (PUMS) by State Departments of Transportation and Metropolitan Planning Organizations
On page iv of this report an incorrect list of Topic Panel members was included. The correct panel list is provided here. The online version has been corrected.

NCHRP Web-Only Document 173: Cast-in-Place Concrete Connections for Precast Deck Systems
The equations in Appendix A did not render properly in the original PDF. They have been corrected.

NCHRP Report 673: A Manual for Design of Hot-Mix Asphalt with Commentary
Page 41, Table 4-7, and page 123, Table 8-10, respectively, should be replaced with a new table.

TRB Special Report 300: Achieving Traffic Safety Goals in the United States: Lessons from Other Nations
Descriptions on pages 56 and 194 of a study by R. B. Noland of the relationship of road design to traffic casualties were incorrect. The correction is available online.

NCHRP Report 708: A Guidebook for Sustainability Performance Measurement for Transportation Agencies
The panel membership for NCHRP Report 708 was corrected in the online PDF version.

SHRP 2 Report S2-R26-RR-2: Guidelines for the Preservation of High-Traffic-Volume Roadways
Table 3.2 (pp. 20-21) contained incorrect information in the following rows; chip seal (single); chip seal (double); and hot in-place recycling. The table has been corrected in the online version of the guide.

NCHRP Synthesis 415: Design Fires in Road Tunnels
On pages 106 and 107, an incorrect reference was cited. In the final paragraph on page 106, the last sentence should read: One study came to the conclusion that, although some minimum water application rates would achieve a certain objective, a marginally higher rate would not necessarily improve the situation (79). The figure caption for Figure 35 at the bottom of page 107 should read: FIGURE 35 NFPA 13, NFPA 15, and other International Water Application Rates (79).

The added reference is as follows: 

79. Harris, K., “Water Application Rates for Fixed Fire Fighting Systems in Road Tunnels,” Proceedings from the Fourth International Symposium on Tunnel Safety and Security, A. Lönnermark and H. Ingason, Eds., Frankfurt am Main, Germany, Mar. 17–19, 2010.

NCHRP Report 612: Safe and Aesthetic Design of Urban Roadside Treatments
Tables 19 and 20 on p. 43 of NCHRP Report 612 include incorrect information. View the corrected tables.

NCHRP Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements
NCHRP Report 617, published in July 2008, includes incorrect information in two of the AMF treatment summaries in Chapter 5. These AMF treatments are “Add Intersection Lighting” and “Add Roadway Segment Lighting.” Both summaries have been corrected in the online version of the report.

TCRP Report 90: Bus Rapid Transit Volume 2: Implementation Guidelines
On page 4-11, in the top row of Figure 4-7, in the last column, the cross street green for the 80 sec cycle is incorrectly listed as 26 sec. It should be 36 sec.

NCHRP Report 577: Guidelines for the Selection of Snow and Ice Control Materials to Mitigate Environmental Impacts
Page 30 incorrectly lists NYSDEC as the New York State Department of Environmental Concern. The correct word is "Conservation," not "Concern."

NCHRP Report 572: Roundabouts in the United States
Table 3 on page 11 incorrectly lists the input parameters of the Israeli model. The input parameters are circulating flow and diameter (not number of legs, number of lanes, speed limit). Also, the units are specified in "Analysis and Evaluation of the Capacity of Roundabouts" by Polus and Shmueli.

NCHRP Synthesis 361: Visualization for Project Development

NCHRP Synthesis 361 contained incorrect information in two places on page 24. The last line in the paragraph under the heading "Organization" (column one) should read: In 1995, visualization became operational; a formal group was established that is still in place today.

Also, the first line in the final paragraph in column two under the heading "Research and Development" should read: Visualization research is ongoing as the technology evolves.

NCHRP Report 507 contained incorrect information in Figure 47 and Table 29. The corrected versions of Figure 47 and table 29 appear here in PDF format.

NCHRP Report 525, Volume 4, included a companion CD (CRP-CD-55).. Two Powerpoint slides (28 and 50) within Chapter II on the CD contained errors, and have been corrected on the revised CD ISO image that can be downloaded.

NCHRP Synthesis 352 was published on December 8, 2005. An incorrect version of Figure 14 was included on page 33. This has been corrected in the on-line version of the report.

On Page 42, in the section on cost, the amount should read $0.26 to $0.85 per foot. This has been corrected in the on-line version of the report.

On the title page the affiliation of the consultant, Frank W. Venezia, was inadvertently misspelled. The correct spelling is: Lea+Elliott, Inc. The title page in TCRP Synthesis 54 online document has been corrected.

In Table 40, some cells are in the wrong row. Attached is the revised Table 40 (document pages 76-78) in PDF format.

Greene (16) measured the color-naming performance of color-normal and -deficient observers to LEDs of various dominant wavelengths [the dominant wavelength of a colored light is defined in Rea (8) as the wavelength of a monochromatic source that, mixed with a suitable proportion of light from a reference white source, will match the appearance of the colored light] and offered preliminary conclusions that dominant wavelengths of 623 nm for red, 591 nm for yellow, and 494 nm for green were probably acceptable for traffic-signal identification.

• "Performance of Flexible Pavement Maintenance Treatments in the Long-Term Pavement Performance SPS-3 Experiment" (03-4526), pp. 47-54.

On page 51, "(1 – α) x 4" should have read, "(1 – α)⁴."

• "Performance of Rigid Pavement Rehabilitation Treatments in the Long-Term Pavement Performance SPS-6 Experiment" (03-4510), pp. 64-72.

On page 68, "(1 – α)" should have read, "(1 – α)⁷," and the reference callout, "(7)" should have been deleted from the end of the sentence.

• "Performance of Flexible Pavement Rehabilitation Treatments in the Long-Term Pavement Performance SPS-5 Experiment" (03-4523), pp. 93-101.

On page 96, "(1 – α)" should have read, "(1 – α)⁴," and the reference callout, "(4)" should have been deleted from the end of the sentence.

In the paper by Tom Burnham, "Seasonal Load Response Behavior of a Thin Portland Cement Concrete Pavement" (LVR8-1055), pp. 251-261, a paragraph from page 259 was repeated on page 260, replacing another paragraph of text. Corrected pages for 259, 260, and 261 are provided in PDF format.

Table 13 (on page 26) has been corrected in the on-line version of the report.

P. 14: In Equation 16, "Horizontal Tensile Stress" should read "Horizontal Tensile Strain."

P. 38: On top of the graph shown as Figure 38, the word "Confined" should read "Unconfined."

Page 78 has corrected callouts. Download Page 78 (PDF)

In the paper by B. J. Dempsey, Development and Performance of Interlayer Stress-Absorbing Composite in Asphalt Concrete Overlays, pp. 175-183, Figure 13 (p. 181) should show 1.83 mm joint displacement for Product A and Product B, as described in the text on p. 179. A corrected page is provided in PDF format.

n = [log10(1 + r*W18/365*ESAL)]/log10(1 + r)

The paper by Martin P. Burke, Jr., and Joseph S. Seif was published under the title, "AASHTO's Load and Resistance Factor Design Specifications for Transverse Braces: Adverse Effects on Integrity and Durability of Reinforced Concrete Deck Slabs"
(pp. 118–125).

The correct title of the paper by Burke and Seif is:
Adverse Effect of AASHTO's LRFD Specifications for Transverse Braces on Integrity and Durability of Reinforced Concrete Deck Slabs

The table of contents, p. iv, should read:

Adverse Effect of AASHTO's LRFD Specifications for Transverse Braces on
Integrity and Durability of Reinforced Concrete Deck Slabs 118
Martin P. Burke, Jr., and Joseph S. Seif

Coauthors Colin J. Apelt and Mark A. Jempson, Department of Civil Engineering, University of Queensland, Queensland, Australia, were inadvertently omitted from the author list on the title page. The title page should read:

NCHRP Report 445
Debris Forces on Highway Bridges

Arthur C. Parola
University of Louisville
Louisville, KY

and

Colin J. Apelt
Mark A. Jempson
University of Queensland
Queensland, Australia