U.S. Department of Transportation
Federal Highway Administration
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
| ERRATA |
| This summary report is an archived publication and may contain dated technical, contact, and link information |
 |
| Publication Number: FHWA-HRT-13-078 Date: January 2014 |
Publication Number: FHWA-HRT-13-078 Date: January 2014 |
| Date: | November 26, 2014 | |
| Issuing Office: | Federal Highway Administration—Office of Research, Development, and Technology: Safety R&D | |
| Address: | Turner-Fairbank Highway Research Center, 6300 Georgetown Pike, McLean, VA 22101 | |
| Name of Document: | Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways | |
| FHWA Publication No.: | FHWA-HRT-13-078 |
The following changes were made to the document after publication on the Federal Highway Administration Web site:
| Location | Incorrect Values | Corrected Values |
| Page 3, Column 1, Bullet 7 | (A; A = abs(G1 - G2) | (A; A = abs(G1 - G2)) |
| Page 3, Column 1, Crash Modifications, Paragraph 1, Sentence 2, parenthesis |
design or traffic control | Design and traffic control |
| Page 3, Column 2, (full) Paragraph 1, Sentence 2 |
two-way | two-lane |
| Page 3, Column 2, CMFs for Horizontal Curves and Tangents on Straight Grades, Paragraph 1, Sentence 1 | estimated as follows | provided in figures 2 and 3 |
| Page 3, Column 2, CMFs for Horizontal Curves and Tangents at Type 1 Crest Vertical Curves, Paragraph 1, Sentence 1 | estimated as follows | provided in figures 4 and 5 |
| Page 4, Column 1, Sentence 1 | “crest vertical curves (C1) were estimated as follows:” follows figure 5. | “crest vertical curves (C1) were estimated as follows:” has been moved to Page 3, ahead of Figure 4 |
| Page 4, Column 1, CMFs for Horizontal Curves and Tangents at Type1 Sag Vertical Curves, line 2 | “sag vertical curves (S1) were estimated as follows:” follows figure 7 | “sag vertical curves (S1) were estimated as follows:” has been moved ahead of figure 6 on Page 4. |
| Page 4, Column 1, CMFs for Horizontal Curves and Tangents at Type 1 Sag Vertical Curves, Paragraph 1, Sentence 1 | were estimated as follows | are shown in figures 6 and 7 |
| Page 4, Column 1, CMFs for Horizontal Curves and Tangents at Type 2 Crest Vertical Curves, Paragraph 1, Sentence 1 | were estimated as follows | are shown in figures 8 and 9 |
| Page 4, Column 2, CMFs for Horizontal Curves and Tangents at Type 2 Sag Vertical Curves, Paragraph 1, Sentence 1 | were estimated as follows | are shown in figures 10 and 11 |
| Page 4, Applications of CMFs, Paragraph 1, Sentence 1, “To calculate CMF values…” | To calculate CMF values | To calculate the CMF values |
| Page 4, Applications of CMFs, Bullet 1, Sentence 1, “Any horizontal R…” | Any horizontal R less than 100 ft | Any horizontal curve R less than 100 ft |
| Page 4, Column 1, CMFs for Horizontal Curves and Tangents at Type 2 Crest Vertical Curves, line 1 through Column 2, CMFs for Horizontal Curves and Tangents at Type 2 Crest Vertical Curves, line 1 | “The CMFs for horizontal crest vertical curves (C2) were estimated as follows:” follows figure 9. | “The CMFs for horizontal crest vertical curves (C2) were estimated as follows:” has been moved ahead of Figure 8 on Page 4. |
| Page 4, Column 2, CMFs for Horizontal Curves and Tangents at Type 2 Sag Vertical Curves, line 2 | “Sag vertical curves (S2) were estimated as follows:” follows figure 11 | “Sag vertical curves (S2) were estimated as follows:” has been moved ahead of Figure 10 on Page 4. |
| Page 4, Applications of CMFs, Paragraph 1, Sentence 1, “To calculate CMF values…” | To calculate CMF values | To calculate the CMF values |
| Page 4, Applications of CMFs, Paragraph 1, Bullet 1 | Any horizontal R | Any horizontal curve R |
| Page 5, Column 1, Figure 12 box | The results presented in figure 2
through figure 11 provide separate
CMFs for FI and PDO crashes. CMF for CMFTOT = [(CMFFI - 1.0) x PFI + (CMFPDO - 1.0) x PPDO] + 1.0 Figure 12. Equation. CMF for combined crash severity level. total crashes (i.e., all crash severity levels combined) can be computed as follows: |
The results presented in figure 2
through figure 11 provide separate
CMFs for FI and PDO crashes. CMF for
total crashes (i.e., all crash severity
levels combined) can be computed as
follows: CMFTOT = [(CMFFI - 1.0) x PFI + (CMFPDO - 1.0) x PPDO] + 1.0 Figure 12. Equation. CMF for combined crash severity level. |
| Page 6, Column 2, Item 5 | CurvesHCurve VCurve | HCurve VCurve |
| Page 6, Column 2, Procedure 1 | 1. Open the Microsoft Excel® calculation tool workbook. | 1. Open the Microsoft Excel® tool at http://www.fhwa.dot.gov/publications/ research/safety/hrtm2130/index.cfm |
| Page 8, For More Information, Paragraph 2, Sentence 1 | For more information about HSIS, contact Carol Tan, Ph.D., FHWA HSIS Program Manager, HRDS, 202-493- 3315, carol.tan@dot.gov. | For more information about HSIS, contact Carol Tan, Ph.D., FHWA HSIS Program Manager, HRDS, 202-493- 3315, carol.tan@dot.gov, or Ana Maria Eigen, D.Sc., FHWA HSIS Program Manager, HRDS, 202-493-3315, ana.eigen@dot.gov. |
| Page 8, Footer, Sentence 4 | The HSIS is issued by | The HSIS is used by |
