U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedIn

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

 
ERRATA
This report is an archived publication and may contain dated technical, contact, and link information
Back to Publication List        
Publication Number:  FHWA-HRT-13-077    Date:  January 2014
Publication Number: FHWA-HRT-13-077
Date: January 2014

 

Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways

Date: November 16, 2014
Issuing Office: Federal Highway Administration—Office of Research, Development, and Technology: Safety Research and Development
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-13-077

The following changes were made to the document after publication:

Location Incorrect Values Corrected Values
Page i, Block 21 63 68
Page 4, SAFETY EFFECTS OF HORIZONTAL ALIGNMENT, Paragraph 1, Sentence 1, Line 2 follows shown in figure 2
Page 4, SAFETY EFFECTS OF HORIZONTAL ALIGNMENT, Paragraph 1, Sentence 1, Figure 2 N = [1.55 (LC)(V) + 0.014(D)(V) − 0.012(S)(V)](0.978)W − 30 N = [1.55 (LC)(V) + 0.014(D)(V) − 0.012(S)(V)](0.978)W − 30
Page 5, Paragraph 3, Sentence 2 in the following form: shown in figure 3:
Page 5, Paragraph 6, Sentence 1 in the following form: as shown in figure 4:
Page 8, Paragraph 1, Sentence 10 (A = abs(G1 – G2)) [A = abs(G1 – G2)]
Page 9, DESCRIPTIVE STATISTICS, Paragraph 1, Sentence 1 (million vehicle miles traveled in the 6-year period (MVMT)) [million vehicle miles traveled in the 6-year period (MVMT)]
Page 14, Paragraph 2, Bullet 2 (this is a standard analysis of variance (ANOVA) using an NB distribution and a log link) [this is a standard analysis of variance (ANOVA) using an NB distribution and a log link]
Page 16, Paragraph 2, Sentence 1 follows shown in figure 6 and figure 7
Page 16, Paragraph 4, Bullet 1,Sentence 2 follows shown in figure 8
Page 17, Horizontal Curves and Tangents on Straight Grades, Paragraph 1,Sentence 1, Bullet 1 (number of roadway segments (N) = 8,095 and total roadway length = 595 mi) [number of roadway segments (N) = 8,095 and total roadway length = 595 mi]
Page 17, Horizontal Curves and Tangents on Straight Grades, Paragraph1, Sentence 1 (i.e., number of roadway sections); total roadway length; and minimum, maximum, mean, and median values for specific parameters) (i.e., number of roadway sections; total roadway length; and minimum, maximum, mean, and median values for specific parameters)
Page 18, Paragraph 1, Sentence 1 follows shown in figure 10 and figure 11
Page 20, Paragraph 5, Sentence 1 follows shown in figure 12, figure 13, and figure 14
Page 23, Paragraph 1, Sentence 1 as follows shown in figure 16 and figure 17
Page 25, Paragraph 2, Sentence 1 follows shown in figure 18 and figure 19
Page 26, Paragraph 1, Sentence 2 follows shown in figure 20 and figure 21
Page 28, Paragraph 1, Sentence 1 follows shown in figure 23 and figure 24
Page 29, Paragraph 5, Sentence 1 follows shown in figure 25 and figure 26
Page 30, Paragraph 2, Sentence 3 follows shown in figure 27 and figure 28
Page 32, Paragraph 1, Sentence 1 follows shown in figure 30 and figure 31
Page 33, Paragraph 4, Sentence 1 follows shown in figure 32 and figure 33
Page 36, Paragraph 1, Sentence 1 follows shown in figure 35 and figure 36
Page 37, Paragraph 4, Sentence 1 follows shown in figure 37 and figure 38
Page 39, HORIZONTAL CURVES AND TANGENTS ON STRAIGHT GRADES, Paragraph 1, Sentence 1 follows shown in figure 39 and figure 40
Page 42, HORIZONTAL CURVES AND TANGENTS AT TYPE 1 CREST VERTICAL CURVES, Paragraph 1, Sentence 1 follows shown in figure 43 and figure 44
Page 44, HORIZONTAL CURVES AND TANGENTS AT TYPE 1 SAG VERTICAL CURVES, Paragraph 1, Sentence 1 follows shown in figure 47 and figure 48
Page 46, HORIZONTAL CURVES AND TANGENTS AT TYPE 2 CREST VERTICAL CURVES, Paragraph 1, Sentence 1 follows shown in figure 51 and figure 52
Page 48, HORIZONTAL CURVES AND TANGENTS AT TYPE 2 SAG VERTICAL CURVES, Paragraph 1, Sentence 1 follows shown in figure 55 and figure 56
Page 50, CMFs FOR COMBINED CRASH SEVERITY LEVELS, Paragraph 1, Sentence 3 follows shown in figure 59

 

Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101